阅读说明：本技术 发动机进气、曲轴箱和防冻液预热组合系统及其预热方法 (Engine air inlet and crankcase and antifreeze liquid preheating combined system and preheating method thereof ) 是由 李志勇 高品佳 高志男 刘涌 庞华廷 武振海 严伟 刘立东 刘剑峰 魏了 杨少东 于 2020-06-24 设计创作，主要内容包括：本发明公开了一种发动机进气、曲轴箱和防冻液预热组合系统,包括控制器、空气加热装置、防冻液预热组件和连通用的管道,外界冷空气经过空气加热装置升温后通过管道将高温空气输入至发动机进气管、曲轴箱上的曲轴箱进气通道内,防冻液预热组件将加热升温后的防冻液输入到发动机缸盖及机体中,空气加热装置、防冻液预热组件均与控制器电连接,控制器与车辆上的蓄电池相连实现供电。本发明的预热组合系统独立于车辆,仅利用车辆上蓄电池少量供电和油箱少量供油便可以实现发动机进气高效预热,迅速提升进气温度及防冻液的温度,进而提升发动机缸内温度及曲轴各个摩擦副温度,降低启动扭矩,使得发动机在苛刻的低温条件下顺利启动。(The invention discloses an engine air inlet and crankcase and antifreeze solution preheating combined system which comprises a controller, an air heating device, an antifreeze solution preheating assembly and a pipeline which is used for connection, wherein outside cold air is heated by the air heating device and then is input into an engine air inlet pipe and a crankcase air inlet channel on a crankcase through the pipeline, the antifreeze solution preheating assembly inputs antifreeze solution which is heated and heated into an engine cylinder cover and an engine body, the air heating device and the antifreeze solution preheating assembly are electrically connected with the controller, and the controller is connected with a storage battery on a vehicle to realize power supply. The preheating combination system is independent of the vehicle, and can realize efficient preheating of the air inlet of the engine by only using a small amount of power supplied by a storage battery and a small amount of oil supplied by an oil tank on the vehicle, so that the air inlet temperature and the temperature of the anti-freezing solution are quickly increased, the temperature in the cylinder of the engine and the temperature of each friction pair of a crankshaft are further increased, the starting torque is reduced, and the engine can be smoothly started under a severe low-temperature condition.)

1. The utility model provides an engine air inlet, crankcase and antifreeze preheat combined system which characterized in that: including controller (6), air heating device, antifreeze preheat the subassembly and even general pipeline, outside cold air process air heating device heaies up the back and imports high-temperature air to through the pipeline in crankcase inlet channel (26) on engine intake pipe (12), crankcase (27), antifreeze preheats the subassembly and imports engine cylinder lid and organism with the antifreeze after heating up, air heating device, antifreeze preheat the subassembly all with controller (6) electricity is connected, controller (6) link to each other with the battery on the vehicle and realize the power supply.

2. The engine intake and antifreeze preheating combined system of claim 1, wherein: the air heating device is of a split structure and comprises a combustor (1), a gas-gas heat exchanger (7) and a controller (6), wherein the combustor (1) is electrically connected with the controller (6), a gas outlet (4) of the combustor (1) is communicated with the gas-gas heat exchanger (7) through a pipeline, the gas-gas heat exchanger (7) is respectively communicated with an engine gas inlet pipe (12) and a crankcase gas inlet channel (26) on a crankcase (27) through two parallel pipelines on a heat exchanger gas outlet pipe (10), and the gas-gas heat exchanger (7) is communicated with an antifreeze solution preheating assembly through an exhaust connecting pipe (11);

an air filter (13) is connected to the engine air inlet pipe (12), and high-temperature gas enters the air filter (13) through the engine air inlet pipe (12) and is discharged through an air inlet of the air filter (13) in a time period before the engine is started; the crankcase (27) is also provided with a breather (30) and a special exhaust port, the breather (30) is communicated with an air outlet hole on the engine crankcase through a pipeline, and the breather (30) is communicated with the outside air through a breather air outlet (31).

3. The engine intake, crankcase, and antifreeze preheating combination system of claim 2, wherein: the gas-liquid separator is characterized in that a power line (2), an air inlet (3), an air outlet (4) and an oil pipe (5) are arranged on the combustor (1), the other end of the power line (2) is connected with a storage battery on a vehicle to realize power supply, the air inlet (3) is connected with an air filter on the vehicle through a pipeline, the other end of the oil pipe (5) is connected with an engine oil tank on the vehicle, and the air outlet (4) is connected with an inner cavity air inlet of the gas-gas heat exchanger (7) through a pipeline.

4. The engine intake, crankcase, and antifreeze preheating combination system of claim 3, wherein: a heat exchanger air inlet pipe (9), a heat exchanger air outlet pipe (10) and an exhaust connecting pipe (11) are arranged on the gas-gas heat exchanger (7), one end of the heat exchanger air inlet pipe (9) is communicated with an air inlet of the heat exchanger (7), the other end of the heat exchanger air inlet pipe is communicated with a fan (8), and an air inlet of the fan (8) is connected with an air filter on a vehicle through a pipeline; the input end of the heat exchanger air outlet pipe (10) is connected to the heat exchanger (7), the output end of the heat exchanger air outlet pipe (10) is connected with the engine air inlet pipe (12) and the crankcase air inlet channel (26) in parallel, the input end of the exhaust connecting pipe (11) is connected to the heat exchanger (7), and the output end of the exhaust connecting pipe (11) is directly communicated with the antifreezing solution preheating assembly.

5. The engine intake, crankcase, and antifreeze preheating combination system of claim 4, wherein: the gas-gas heat exchanger (7) is of a double-cavity structure and comprises an inner cavity and an outer cavity, a gas inlet of the inner cavity is connected with the gas outlet (4) of the combustor (1) through a pipeline, one end of the exhaust connecting pipe (11) is communicated with the inner cavity, and the other end of the exhaust connecting pipe (11) is communicated with the antifreeze preheating assembly to output high-temperature exhaust gas after primary cooling; the air inlet of the outer cavity is connected with the heat exchanger air inlet pipe (9), and the air outlet of the outer cavity is connected with the heat exchanger air outlet pipe (10) to output preheated air.

6. The engine intake, crankcase, and antifreeze preheating combination system of claim 5, wherein: the heat exchanger air outlet pipe (10) is communicated with the engine air inlet pipe (12) through an air inlet pipe air inlet connecting pipe (28), and a second gas valve (24) is arranged on the air inlet pipe air inlet connecting pipe (28); the heat exchanger air outlet pipe (10) is connected with the crankcase air inlet channel (26) through a crankcase air inlet connecting pipe (25), and a first gas valve (23) is arranged on the crankcase air inlet connecting pipe (25); the second gas valve (24) and the first gas valve (23) are both electrically connected with the controller (6).

7. The engine intake, crankcase, and antifreeze preheating combination system of claim 1, wherein: the anti-freezing solution preheating assembly comprises a gas-liquid heat exchanger (14), a water pump (16), a machine body water outlet pipe (18) and a cylinder cover water inlet pipe (21), the inner cavity of the gas-liquid heat exchanger (14) is communicated with the inner cavity of the gas-gas heat exchanger (7) through the exhaust connecting pipe (11), and a gas-liquid heat exchanger exhaust port (22) is formed in the inner cavity of the gas-liquid heat exchanger (14); the outer cavity of the gas-liquid heat exchanger (14) is connected with the water pump (16) through a heat exchanger water inlet pipe (15), the water pump (16) is communicated with an anti-freezing liquid cavity in the machine body through the machine body water outlet pipe (18), and the other end of the outer cavity of the gas-liquid heat exchanger (14) is communicated with a cylinder cover water inlet pipe (21) through a heat exchanger water outlet pipe (19).

8. The engine intake, crankcase, and antifreeze preheating combination system of claim 7, wherein: the water pump (16) and the pipeline of the machine body water outlet pipe (18) are provided with a first liquid valve (17), the heat exchanger water outlet pipe (19) is provided with a second liquid valve (20), and the first liquid valve (17) and the second liquid valve (20) are electrically connected with the controller (6).

9. The engine intake, crankcase, and antifreeze preheating combination system of claim 1, wherein: the air heating device is of an integral structure and comprises a combustor (1), a hearth (33), a gas cavity (34) and a connecting pipeline, wherein one end of the combustor (1) is provided with a power line (2), an air inlet (3) and an oil pipe (5), the other end of the power line (2) is connected with a storage battery on a vehicle to realize power supply, the air inlet (3) is connected with an air filter on the vehicle through a pipeline, the other end of the oil pipe (5) is connected with an oil tank on the vehicle, the other end of the combustor (1) extends into the hearth (33), and the gas cavity (34) is wrapped outside the hearth (33); an exhaust port (35) is formed in the hearth (33), and the exhaust port (35) is communicated with the outside air;

a heat exchanger air inlet pipe (9) is arranged at one end of the gas cavity (34), the other end of the heat exchanger air inlet pipe (9) is communicated with a fan (8), an air inlet of the fan (8) is connected with an air filter on a vehicle through a pipeline, and an outlet end of the gas cavity (34) is respectively connected with a crankcase air inlet channel (26) on the crankcase (27) and an engine air inlet pipe (12) through a heat exchanger air outlet pipe (10); the heat exchanger air outlet pipe (10) is connected with the crankcase air inlet channel (26) through a crankcase air inlet connecting pipe (25); the heat exchanger air outlet pipe (10) is communicated with the engine air inlet pipe (12) through an air inlet pipe air inlet connecting pipe (28);

the anti-freezing solution preheating assembly comprises a liquid cavity (32) and a connecting pipeline, the other end of the gas cavity (34) is provided with the liquid cavity (32), one end of the liquid cavity (32) is communicated with a cylinder cover water inlet pipe (21) through a heat exchanger water outlet pipe (19), and a second valve (20) is arranged on the heat exchanger water outlet pipe (19); the other end of the liquid cavity (32) is connected with a water pump (16) through a heat exchanger water inlet pipe (15), the water pump (16) is communicated with an anti-freezing liquid cavity in the machine body through a machine body water outlet pipe (18), and a first valve (17) is arranged on a pipeline of the machine body water outlet pipe (18).

10. A warm-up method using the combined engine intake, crankcase and antifreeze warm-up system according to any of claims 1-9, characterized in that: the method comprises the following steps:

the first process is that the combustor (1) works: by turning on a starting switch of the preheating system, the starting switch is arranged on a control panel of a cab or is controlled by an electric switch on an engine controller, the system starts the normal work of the combustor (1) under the control of the controller (6) to produce high-temperature exhaust gas, and the high-temperature exhaust gas is discharged through the air outlet (4);

and in the second process, the gas-gas heat exchanger (7) works: high-temperature exhaust gas generated in the first process enters an inner cavity of the gas-gas heat exchanger (7) through a pipeline communicated with the gas outlet (4), cold air enters an outer cavity of the gas-gas heat exchanger (7) through the heat exchanger gas inlet pipe (9) under the action of the fan (8), heat of the high-temperature exhaust gas is transferred to the cold air in the outer cavity, and the cold air is heated to form high-temperature gas; the exhaust gas after primary temperature reduction is discharged into the antifreezing solution preheating assembly through an exhaust connecting pipe (11);

and step three, preheating of engine air inlet, a crankcase and antifreeze liquid: in the second process, high-temperature gas in the outer cavity of the gas-gas heat exchanger (7) is divided into two branches for output through a gas outlet pipe (10) of the heat exchanger under the driving action of a fan (8);

preheating of engine intake air: in the second process, under the driving action of a fan (8), the high-temperature gas in the outer cavity of the gas-gas heat exchanger (7) outputs preheated high-temperature gas through a heat exchanger gas outlet pipe (10) and enters an engine gas inlet pipe (12) through a second gas valve (24) and a gas inlet connecting pipe (28), and when the engine is started, the high-temperature gas enters the cylinder, so that mixed gas is smoothly ignited, and the cold start of the engine is completed; in the time period before the engine is not started, high-temperature gas is discharged through an air inlet of an air filter (14);

preheating a crankcase: the other path of the air flow enters a crankcase (27) of the engine through a first air valve (23), a crankcase air inlet connecting pipe (25) and a crankcase air inlet channel (26), and after each friction pair and cylinder sleeve piston in the crankcase are heated to set time, the air flow is exhausted from a breather air outlet (31) or a special exhaust port through a cylinder cover (29) and a breather (30) of the engine;

preheating the antifreeze solution: the exhaust gas after primary temperature reduction in the inner cavity of the gas-gas heat exchanger (7) is output to the inner cavity of the gas-liquid heat exchanger (14) through an exhaust connecting pipe (11), and then is subjected to heat exchange with the antifreeze solution in the outer cavity of the gas-liquid heat exchanger (14) and then is exhausted to the atmosphere through an exhaust port (22) of the gas-liquid heat exchanger;

under the action of a water pump (16), antifreeze in the engine body enters an outer cavity of a gas-liquid heat exchanger (14) through an engine body water outlet pipe (18) and a first liquid valve (17), is heated through the heat exchange effect, enters an engine cylinder cover through a heat exchanger water outlet pipe (19), a second liquid valve (20) and a cylinder cover water inlet pipe (21), enters the engine body through the cylinder cover, and finally returns to the water pump (16) through the engine body water outlet pipe (18), so that the heating circulation of the antifreeze is realized.

Technical Field

The invention relates to the technical field of automobile power systems, in particular to an engine air inlet and crankcase and antifreeze solution preheating combined system and a preheating method thereof.

Background

When the engine is started smoothly, two conditions need to be met, firstly, the compressed gas in the cylinder must reach the ignition temperature of fuel oil to enable the fuel oil mixed gas to be ignited smoothly, and secondly, the rotating speed of the engine must reach the set requirement. However, in an extremely cold area, the air temperature in the cylinder is extremely low, if auxiliary heating measures are not adopted, the final compression temperature in the cylinder of the engine cannot meet the requirement, at present, the common measures for increasing the air inlet temperature are to additionally arrange a preheating plug, an air inlet preheating resistance wire and the like in the cylinder, but the air inlet preheating resistance wire is low in heating power due to the fact that the storage battery is insufficient in power, the contact area with the air is small, and the air inlet temperature is difficult to increase in a short time to meet the starting requirement. In addition, at low temperature, the viscosity of lubricating oil is increased, the frictional resistance between engine moving parts is increased, and the power of a starter is insufficient due to the insufficient power of a storage battery caused by low temperature, so that the starting speed of the engine is reduced, and the engine is difficult to start smoothly. The anti-freezing liquid and the crankcase are heated, so that the cylinder wall and the lower bottom surface of the cylinder cover can be heated, the temperature of a combustion chamber can be increased, meanwhile, the engine oil is also heated by the anti-freezing liquid in the oil cooler, and the heated engine oil can be preferentially supplied to each friction pair of the main oil duct and the crankshaft when the engine is started, so that the starting torque is reduced. The crankcase heating can also promote the temperature of cylinder liner and piston except the temperature that can promote each friction pair of bent axle, further reduces frictional resistance, does benefit to promote the start-up rotational speed. Therefore, the air inlet system, the crankcase and the antifreeze of the engine are simultaneously preheated by adopting the air inlet and crankcase and antifreeze preheating combined device, the air inlet temperature can be quickly increased, the starting torque is reduced, and the engine can be smoothly started in an extremely cold area.

Disclosure of Invention

Before the engine is started, the air inlet, crankcase and antifreeze solution preheating combination device provides large-flow hot air for the engine air inlet system and the crankcase by burning fuel oil and utilizing combustion flame and high-temperature exhaust heat through the gas-gas heat exchanger, and simultaneously heats antifreeze solution through the gas-liquid heat exchanger, so that the air inlet temperature is greatly increased at low temperature, the compression end temperature in a cylinder is further raised, and the crankcase and antifreeze solution are heated, so that the temperature of engine oil is raised, the resistance of each friction pair of the crankshaft, the cylinder sleeve and the piston is reduced, the starting rotating speed is raised, and conditions are provided for smooth starting of the engine.

In order to solve the technical problems, the invention adopts the following technical scheme:

the invention discloses an engine air inlet, crankcase and antifreeze liquid preheating combined system which comprises a controller, an air heating device, an antifreeze liquid preheating assembly and a pipeline for connection, wherein external cold air is heated by the air heating device and then is input into an engine air inlet pipe and a crankcase air inlet channel on a crankcase through the pipeline, the antifreeze liquid preheating assembly inputs antifreeze liquid heated by heating into an engine cylinder cover and an engine body, the air heating device and the antifreeze liquid preheating assembly are electrically connected with the controller, and the controller is connected with a storage battery on a vehicle to realize power supply.

Preferably, the air heating device is of a split structure and comprises a burner, a gas-gas heat exchanger and a controller, wherein the burner is electrically connected with the controller, an air outlet of the burner is communicated with the gas-gas heat exchanger through a pipeline, the gas-gas heat exchanger is respectively communicated with an engine air inlet pipe and a crankcase air inlet channel on a crankcase through two parallel pipelines on a heat exchanger air outlet pipe, and the gas-gas heat exchanger is communicated with the antifreeze solution preheating assembly through an exhaust connecting pipe; the air inlet pipe of the engine is connected with an air filter, and high-temperature gas enters the air filter through the air inlet pipe of the engine and is discharged through an air inlet of the air filter in a time period before the engine is started; the crankcase is also provided with a breather and a special exhaust port, the breather is communicated with an air outlet hole on the engine crankcase through a pipeline, and the breather is communicated with the outside air through a breather air outlet.

Preferably, the combustor is provided with a power line, an air inlet, an air outlet and an oil pipe, the other end of the power line is connected with a storage battery on the vehicle to realize power supply, the air inlet is connected with an air filter on the vehicle through a pipeline, the other end of the oil pipe is connected with an engine oil tank on the vehicle, and the air outlet is connected with an inner cavity air inlet of the gas-gas heat exchanger through a pipeline.

Preferably, the gas-gas heat exchanger is provided with a heat exchanger gas inlet pipe, a heat exchanger gas outlet pipe and an exhaust connecting pipe, one end of the heat exchanger gas inlet pipe is communicated with a gas inlet of the heat exchanger, the other end of the heat exchanger gas inlet pipe is communicated with a fan, and the gas inlet of the fan is connected with an air filter on a vehicle through a pipeline; the input end of the heat exchanger air outlet pipe is connected to the heat exchanger, the output end of the heat exchanger air outlet pipe is simultaneously connected with the engine air inlet pipe and the crankcase air inlet channel in parallel, the input end of the exhaust connecting pipe is connected to the heat exchanger, and the output end of the exhaust connecting pipe is directly communicated with the antifreezing solution preheating assembly.

Preferably, the gas-gas heat exchanger is of a double-cavity structure and comprises an inner cavity and an outer cavity, a gas inlet of the inner cavity is connected with the gas outlet of the burner through a pipeline, one end of the exhaust connecting pipe is communicated with the inner cavity, and the other end of the exhaust connecting pipe is communicated with the antifreeze preheating assembly to output high-temperature exhaust gas after primary cooling; the air inlet of the outer cavity is connected with the air inlet pipe of the heat exchanger, and the air outlet of the outer cavity is connected with the air outlet pipe of the heat exchanger to output preheated air.

Preferably, the air outlet pipe of the heat exchanger is communicated with the air inlet pipe of the engine through an air inlet connecting pipe of the air inlet pipe, and a second gas valve is arranged on the air inlet connecting pipe of the air inlet pipe; the heat exchanger air outlet pipe is connected with the crankcase air inlet channel through a crankcase air inlet connecting pipe, and a first gas valve is arranged on the crankcase air inlet connecting pipe; the second gas valve and the first gas valve are both electrically connected with the controller.

Preferably, the antifreeze solution preheating assembly comprises a gas-liquid heat exchanger, a water pump, a machine body water outlet pipe and a cylinder cover water inlet pipe, an inner cavity of the gas-liquid heat exchanger is communicated with an inner cavity of the gas-liquid heat exchanger through the exhaust connecting pipe, and an exhaust port of the gas-liquid heat exchanger is arranged on the inner cavity of the gas-liquid heat exchanger; the outer cavity of the gas-liquid heat exchanger is connected with the water pump through a heat exchanger water inlet pipe, the water pump is communicated with an anti-freezing liquid cavity in the machine body through the machine body water outlet pipe, and the other end of the outer cavity of the gas-liquid heat exchanger is communicated with a cylinder cover water inlet pipe through a heat exchanger water outlet pipe.

Preferably, a first liquid valve is arranged on a pipeline between the water pump and the water outlet pipe of the machine body, a second liquid valve is arranged on the water outlet pipe of the heat exchanger, and the first liquid valve and the second liquid valve are electrically connected with the controller.

Preferably, the air heating device is of an integral structure and comprises a burner, a hearth, a gas cavity and a connecting pipeline, wherein one end of the burner is provided with a power line, an air inlet and an oil pipe, the other end of the power line is connected with a storage battery on a vehicle to realize power supply, the air inlet is connected with an air filter on the vehicle through a pipeline, the other end of the oil pipe is connected with an oil tank on the vehicle, the other end of the burner extends into the hearth, and the gas cavity is wrapped outside the hearth; an exhaust port is arranged on the hearth and is communicated with the outside air;

one end of the gas cavity is provided with a heat exchanger gas inlet pipe, the other end of the heat exchanger gas inlet pipe is communicated with a fan, a gas inlet of the fan is connected with an air filter on a vehicle through a pipeline, and an outlet end of the gas cavity is respectively connected with a crankcase gas inlet channel on the crankcase and an engine gas inlet pipe through a heat exchanger gas outlet pipe; the heat exchanger air outlet pipe is connected with the crankcase air inlet channel through a crankcase air inlet connecting pipe; the heat exchanger air outlet pipe is communicated with the engine air inlet pipe through an air inlet pipe air inlet connecting pipe;

the anti-freezing solution preheating assembly comprises a liquid cavity and a connecting pipeline, the other end of the gas cavity is provided with the liquid cavity, one end of the liquid cavity is communicated with a cylinder cover water inlet pipe through a heat exchanger water outlet pipe, and a second valve is arranged on the heat exchanger water outlet pipe; the other end of the liquid cavity is connected with a water pump through a heat exchanger water inlet pipe, the water pump is communicated with the anti-freezing liquid cavity in the machine body through the machine body water outlet pipe, and a first valve is arranged on a pipeline of the machine body water outlet pipe.

A preheating method using the combined engine intake, crankcase and antifreeze preheating system as described above, comprising the following processes:

the first process and the operation of a combustor: by turning on a starting switch of the preheating system, the starting switch is arranged on a control panel of a cab or is controlled by an electric switch on an engine controller, the system starts to work normally under the control of the controller to produce high-temperature exhaust gas, and the high-temperature exhaust gas is discharged through the air outlet;

and in the second process, the gas-gas heat exchanger works: high-temperature exhaust gas generated in the first process enters an inner cavity of the gas-gas heat exchanger through a pipeline communicated with a gas outlet, cold air enters an outer cavity of the gas-gas heat exchanger through a gas inlet pipe of the heat exchanger under the action of the fan, heat of the high-temperature exhaust gas is transferred to the cold air in the outer cavity, and the cold air is heated to high-temperature gas; the exhaust gas after primary cooling is discharged into the antifreezing solution preheating assembly through an exhaust connecting pipe;

and step three, preheating of engine air inlet, a crankcase and antifreeze liquid: in the second process, the high-temperature gas in the outer cavity of the gas-gas heat exchanger is divided into two branches through the gas outlet pipe of the heat exchanger to be output under the driving action of the fan;

preheating of engine intake air: high-temperature gas in the outer cavity of the gas-gas heat exchanger in the second process is output and preheated through the gas outlet pipe of the heat exchanger under the driving action of the fan and enters the gas inlet pipe of the engine through the second gas valve and the gas inlet connecting pipe of the gas inlet pipe, and when the engine is started, the high-temperature gas enters the inside of the cylinder, so that mixed gas is smoothly ignited, and the cold start of the engine is completed; in the time period before the engine is not started, high-temperature gas is discharged through an air inlet of an air filter;

preheating a crankcase: the other path of the air flow enters the crankcase of the engine through a first air valve, a crankcase air inlet connecting pipe and a crankcase air inlet channel, and after each friction pair and cylinder sleeve piston in the crankcase are heated to set time, the air flow is discharged from an air outlet or a special air outlet of a respirator through a cylinder cover and the respirator of the engine;

preheating the antifreeze solution: the exhaust gas after primary temperature reduction in the inner cavity of the gas-liquid heat exchanger is output to the inner cavity of the gas-liquid heat exchanger through an exhaust connecting pipe, and then is subjected to heat exchange with the antifreeze in the outer cavity of the gas-liquid heat exchanger and then is exhausted to the atmosphere through an exhaust port of the gas-liquid heat exchanger; under the action of the water pump, antifreeze in the engine body enters an outer cavity of the gas-liquid heat exchanger through the engine body water outlet pipe and the first liquid valve, is heated through the heat exchange effect, enters the engine cylinder cover through the heat exchanger water outlet pipe, the second liquid valve and the cylinder cover water inlet pipe, enters the engine body through the cylinder cover, and finally returns to the water pump through the engine body water outlet pipe, so that the heating circulation of the antifreeze is realized.

Compared with the prior art, the invention has the beneficial technical effects that:

the invention relates to an engine air inlet, crankcase and antifreeze liquid preheating combined system, which comprises a cold air preheating assembly, an antifreeze liquid preheating assembly and a plurality of pipelines which are connected with each other, wherein the cold air preheating assembly comprises a burner, an air-air heat exchanger and a controller; the gas-gas heat exchanger is communicated with the antifreezing solution preheating assembly through an exhaust connecting pipe, wherein the antifreezing solution assembly comprises a gas-liquid heat exchanger, a water pump, a machine body water outlet pipe, a heat exchanger water outlet pipe and a cylinder cover water inlet pipe, and the components are communicated with the machine body and a cylinder cover antifreezing solution cavity to form a self-heating circulation loop so as to realize the preheating operation of the antifreezing solution. The design of the combustor and the heat exchanger realizes a process of converting cold air into a high-temperature heat source, the temperature of the cold air at minus 40 ℃ can be raised to be above 100 ℃, the efficient preheating of the inlet air of the engine is realized, the inlet air temperature is rapidly raised, and the final temperature of the compression in the cylinder is further raised; meanwhile, the crankcase is heated, the temperature of each friction pair of the crankshaft, the temperature of the piston and the cylinder sleeve are raised, the starting torque is reduced, the anti-freezing solution is heated through the gas-liquid heat exchanger, the temperature of engine oil is raised, the resistance of each friction pair of the crankshaft is further reduced, the starting rotating speed is raised, conditions are provided for the smooth starting of the engine, and the engine is smoothly started under the harsh low-temperature condition; when cold air enters, the cold air is filtered through an air filter on the vehicle, so that the cleanliness is higher, the working environment of the equipment is maintained more conveniently, and the service life of the equipment is prolonged; in addition, compared with the prior art, the water content is very high in the high temperature exhaust of conventional preheating, approximately account for gas mixture more than 5%, a large amount of steam can produce the dilution to the lubricating oil between the spare part, can further increase the frictional force between the spare part of high-speed operation, thereby reduce the life of equipment, this system's of preheating natural air heat exchange intensifies the temperature the back, water content greatly reduced approximately accounts for below 0.05% of high-temperature air, be less than the requirement of machine oil water content, effectively guaranteed the life of equipment.

In general, before the engine is started, a combustor starts to burn by using a small amount of power supplied by a storage battery and a small amount of oil supplied by an oil tank on a vehicle, high-temperature mixed gas after burning is connected with an inner cavity of a gas-gas heat exchanger through an air outlet to heat natural air in the outer cavity of the gas-gas heat exchanger, and the heated high-temperature gas enters an air inlet pipe of the engine to provide large-flow hot air for the engine, so that the compression end temperature in a cylinder is improved, and a temperature condition is provided for smooth ignition of; meanwhile, the high-temperature gas quickly preheats the crankshaft and the bearing bush in the crankcase, so that the frictional resistance between the piston and the engine body is effectively reduced; and when the engine is started, the heated engine oil is preferentially supplied to the main oil duct and each friction pair of the crankshaft, so that the temperature of each friction pair of the crankshaft and the piston of the cylinder sleeve is increased, the starting torque of the engine is reduced, and the starting rotating speed is increased.

The preheating combined system is independent of a vehicle, and can realize efficient preheating of air inlet of an engine by only utilizing a small amount of power supplied by a storage battery and a small amount of oil supplied by an oil tank on the vehicle, so that the temperature of a crankcase and an antifreeze of an air inlet system is quickly increased, the temperature of each friction pair of a crankshaft is further increased, the starting torque is reduced, and the engine can be smoothly started under a severe low-temperature condition.

Drawings

The invention is further illustrated in the following description with reference to the drawings.

FIG. 1 is a first schematic diagram of the operation of an engine intake, crankcase and antifreeze preheating combined system of the present invention;

FIG. 2 is a second schematic diagram of the operation of the combined intake, crankcase and antifreeze preheating system of the engine of the present invention;

description of reference numerals: 1. a burner; 2. a power line; 3. an air inlet; 4. an air outlet; 5. an oil pipe; 6. a controller; 7. a gas-gas heat exchanger; 8. a fan; 9. a heat exchanger air inlet pipe; 10. an air outlet pipe of the heat exchanger; 11. an exhaust connecting pipe; 12. an engine intake duct; 13. an air cleaner; 14. a gas-liquid heat exchanger; 15. a heat exchanger water inlet pipe; 16. a water pump; 17. a first liquid valve; 18. a water outlet pipe of the machine body; 19. a water outlet pipe of the heat exchanger; 20. a second liquid valve; 21. a cylinder cover water inlet pipe; 22. an exhaust port of the gas-liquid heat exchanger; 23. a first gas valve; 24. a second gas valve; 25. a crankcase air inlet connecting pipe; 26. a crankcase air intake passage; 27. a crankcase; 28. an air inlet connecting pipe of the air inlet pipe; 29. a cylinder head cover; 30. a respirator; 31. a respirator outlet; 32. a liquid chamber; 33. a hearth; 34. a gas chamber; 35. and (7) an exhaust port.

Detailed Description

As shown in fig. 1 and 2, an engine intake, crankcase and antifreeze solution preheating combined system includes a controller 6, an air heating device, an antifreeze solution preheating assembly and a pipeline for connection, after the temperature of external cold air is raised by the air heating device, high-temperature air is input into the engine intake pipe 12 and the crankcase intake passage 26 on the crankcase 27 through the pipeline, the antifreeze solution preheating assembly inputs the heated antifreeze solution into the cylinder head and the engine body of the engine, the air heating device and the antifreeze solution preheating assembly are both electrically connected with the controller 6, and the controller 6 is connected with a storage battery on the vehicle to realize power supply.