阅读说明：本技术 一种发动机预热方法与系统 (Engine preheating method and system ) 是由 朱红娜 于洋洋 江红辉 张月匣 于 2020-05-28 设计创作，主要内容包括：本发明涉及发动机技术领域,尤其涉及一种发动机预热方法与系统,其包括发动机、电加热器、水泵、发动机冷却系统及水箱,电加热器、水泵、发动机冷却系统与发动机之间通过冷却液管路连通,电加热器及水泵侧冷却液管路构成发动机预热系统,发动机两侧分别安装有第一及第二电磁转换阀,发动机冷却系统及预热系统分别接通不同的电磁转换阀位,水箱安装于第一电磁转换阀与电加热器之间为发动机预热系统补水,水箱上安装有水位传感器,水箱与电加热器连接的供水管路上安装有常开电磁阀及温度与水位传感器总成。本发明提供的系统与结构简单,操作简便,效率较高,能够有效解决冬季发动机启动困难、磨损较大问题。(The invention relates to the technical field of engines, in particular to an engine preheating method and an engine preheating system, which comprise an engine, an electric heater, a water pump, an engine cooling system and a water tank, wherein the electric heater, the water pump, the engine cooling system and the engine are communicated through cooling liquid pipelines, the electric heater and the cooling liquid pipelines on the side of the water pump form the engine preheating system, the two sides of the engine are respectively provided with a first electromagnetic conversion valve and a second electromagnetic conversion valve, the engine cooling system and the preheating system are respectively communicated with different electromagnetic conversion valve positions, the water tank is arranged between the first electromagnetic conversion valve and the electric heater to supplement water for the engine preheating system, the water tank is provided with a water level sensor, and a water supply pipeline connected with the electric heater and the water tank is. The system and the structure provided by the invention are simple, the operation is simple and convenient, the efficiency is higher, and the problems of difficult starting and larger abrasion of the engine in winter can be effectively solved.)

1. An engine warm-up method is characterized by comprising the following procedures:

a preparation stage:

firstly, a vehicle is powered on, initialized and processed;

secondly, collecting the water level of a water tank;

thirdly, collecting the ambient temperature and judging whether the engine needs to be preheated; the next step is needed, and the engine is directly started without the need;

preheating process:

fourthly, switching on a preheating system through two electromagnetic directional valves when preheating is needed, and closing a cooling system;

fifthly, turning on an electric heater and a water pump to heat the cooling liquid;

sixthly, collecting the temperature in the preheating system, wherein the temperature in the preheating system reaches a set value, and closing a normally open valve;

an engine temperature acquisition process:

collecting the temperature in the engine, and judging whether the preheating of the engine is finished;

and eighthly, finishing preheating the engine, turning off the electric heater and the water pump, finishing acquisition of the temperature and the water level in the preheating system, turning off the preheating system by reversing the two electromagnetic reversing valves, and switching on the cooling system.

2. The engine preheating method according to claim 1, wherein in the seventh step, if the engine preheating is not completed, the engine preheating enters a water supplementing process, the water level in the system pipeline is collected, whether water is required to be supplemented in the pipeline is judged, if water is required to be supplemented, a normally open valve is opened, water enters the preheating system pipeline, the normally open valve is closed within a set time, and if water is not required, the engine preheating returns to the seventh step, and the engine temperature is collected.

3. The engine preheating system is characterized by comprising an engine, an electric heater, a water pump, an engine cooling system and a water tank, wherein the electric heater, the water pump, the engine cooling system and the engine are respectively communicated through cooling liquid pipelines, the electric heater and the cooling liquid pipeline on the side of the water pump form the engine preheating system, a first electromagnetic change-over valve and a second electromagnetic change-over valve are respectively installed on two sides of the engine, the engine cooling system and the engine preheating system are respectively communicated with different electromagnetic change-over valve positions, the water tank is installed between the first electromagnetic change-over valve and the electric heater to supplement water for the engine preheating system, a water level sensor is installed on the water tank, and a normally open electromagnetic valve and a temperature and water level sensor assembly are installed on a water supply pipeline.

Technical Field

The invention relates to the technical field of engines, in particular to an engine preheating method and system.

Background

The environmental temperature is lower in winter, the mobility of lubricating oil in the engine is poor, the frictional resistance among all parts is large, the engine is difficult to start, and the abrasion to the engine is large. Therefore, when a parked vehicle is started for a long time, the vehicle needs to be warmed up, and when the temperature of the engine reaches a certain temperature and the vehicle is started, the performance of the vehicle can reach the optimal state. The traditional engine preheating system is relatively complex in structure and long in preheating time.

Disclosure of Invention

The invention aims to solve the technical problem of providing an engine preheating method and system which are simple in structure, simple and convenient to operate and high in efficiency and can effectively solve the problems of difficulty in starting and high abrasion of an engine in winter.

The invention is realized by the following technical scheme:

an engine warm-up method, comprising the following steps:

a preparation stage:

firstly, a vehicle is powered on, initialized and processed;

secondly, collecting the water level of a water tank;

thirdly, collecting the ambient temperature and judging whether the engine needs to be preheated; the next step is needed, and the engine is directly started without the need;

preheating process:

fourthly, switching on a preheating system through two electromagnetic directional valves when preheating is needed, and closing a cooling system; fifthly, turning on an electric heater and a water pump to heat the cooling liquid;

sixthly, collecting the temperature in the preheating system, wherein the temperature in the preheating system reaches a set value, and closing a normally open valve;

an engine temperature acquisition process:

collecting the temperature in the engine, and judging whether the preheating of the engine is finished;

and eighthly, finishing preheating the engine, turning off the electric heater and the water pump, finishing acquisition of the temperature and the water level in the preheating system, turning off the preheating system by reversing the two electromagnetic reversing valves, and switching on the cooling system.

And further, in the seventh step, if the preheating of the engine is not completed, entering a water supplementing flow, acquiring the water level in a system pipeline, judging whether water is required to be supplemented in the pipeline, opening a normally open valve if water is required to be supplemented, entering the preheating system pipeline, closing the normally open valve within a set time, and returning to the seventh step if water is not required to be supplemented, so as to acquire the temperature of the engine.

The engine preheating system comprises an engine, an electric heater, a water pump, an engine cooling system and a water tank, wherein the electric heater, the water pump, the engine cooling system and the engine are communicated through cooling liquid pipelines respectively, the electric heater and the cooling liquid pipeline on the side of the water pump form the engine preheating system, a first electromagnetic conversion valve and a second electromagnetic conversion valve are installed on two sides of the engine respectively, the engine cooling system and the engine preheating system are communicated with different electromagnetic conversion valve positions respectively, the water tank is installed between the first electromagnetic conversion valve and the electric heater to supplement water for the engine preheating system, a water level sensor is installed on the water tank, and a normally open electromagnetic valve and a temperature and water level sensor assembly are installed on a water supply pipeline connected with the electric heater.

Advantageous effects of the invention

The invention provides an engine preheating method and system, which mainly aim at personnel wearing protective equipment and have the following advantages:

1. the system adopts electric heating, and the structure is simple;

2. the amount of cooling liquid required to be heated during preheating is small, the preheating time is short, the power consumption is low, and the efficiency is high;

3. the required added hardware is simple, the quantity is less, and the cost performance is higher;

4. the system reliability is high.

Drawings

FIG. 1 is a schematic flow diagram of an engine warm-up system;

FIG. 2 is a functional block diagram of an engine warm-up system;

in the figure, 1, an engine, 2, a first electromagnetic conversion valve, 3, an electric heater, 4, a water pump, 5, a second electromagnetic conversion valve, 6, an engine cooling system, 7, an engine preheating system, 8, a water tank, 801, a water level sensor, 9, a normally open electromagnetic valve, 10 and a temperature and water level sensor assembly are arranged.

Detailed Description

An engine warm-up method, comprising the following steps:

a preparation stage:

firstly, a vehicle is powered on, initialized and processed;

secondly, collecting the water level of a water tank; judging whether the cooling liquid needs to be supplemented or not, displaying the cooling liquid on a screen in the cab, and supplementing the cooling liquid in time if necessary;

thirdly, collecting the ambient temperature and judging whether the engine needs to be preheated; the next step is needed, and the engine is directly started without the need;

preheating process:

fourthly, switching on a preheating system through two electromagnetic directional valves when preheating is needed, and closing a cooling system;

fifthly, turning on an electric heater and a water pump to heat the cooling liquid; the electric heater is used for heating the cooling liquid, and the water pump is used for circulating the cooling liquid in the system.

Sixthly, collecting the temperature in the preheating system, wherein the temperature in the preheating system reaches a set value, and closing a normally open valve;

an engine temperature acquisition process:

collecting the temperature in the engine, and judging whether the preheating of the engine is finished;

and eighthly, finishing preheating the engine, turning off the electric heater and the water pump, finishing acquisition of the temperature and the water level in the preheating system, turning off the preheating system by reversing the two electromagnetic reversing valves, and switching on the cooling system.

And further, in the seventh step, if the preheating of the engine is not completed, entering a water supplementing flow, acquiring the water level in a system pipeline, judging whether water is required to be supplemented in the pipeline, opening a normally open valve if water is required to be supplemented, entering the preheating system pipeline, closing the normally open valve within a set time, and returning to the seventh step if water is not required to be supplemented, so as to acquire the temperature of the engine.

An engine preheating system comprises an engine 1, an electric heater 3, a water pump 4, an engine cooling system 6 and a water tank 8, wherein the electric heater, the water pump, the engine cooling system and the engine are communicated through cooling liquid pipelines respectively, the electric heater and the cooling liquid pipeline on the water pump side form an engine preheating system 7, a first electromagnetic change-over valve 2 and a second electromagnetic change-over valve 5 are installed on two sides of the engine respectively, the engine cooling system and the engine preheating system are communicated with different electromagnetic change-over valve positions respectively, the water tank is installed between the first electromagnetic change-over valve and the electric heater to supplement water for the engine preheating system, a water level sensor 801 is installed on the water tank, and a normally open electromagnetic valve 9 and a temperature and water level sensor assembly 10 are installed on a water supply pipeline connected with.

The first electromagnetic conversion valve and the second electromagnetic conversion valve are communicated with the engine cooling system under the normal state, and are disconnected with the engine cooling system after being reversed and communicated with the preheating system. After preheating is finished, the electromagnetic conversion valve is switched to be disconnected with the preheating system and is connected with the engine cooling system.

The sequence of the coolant circulation pipeline of the preheating system is engine → first electromagnetic change-over valve → electric heater → water pump → second electromagnetic change-over valve → engine.

The water pump is arranged between the outlet and the inlet of the engine to form water circulation.

Set up the water tank on the pipeline, electric heater closes normally open solenoid valve after with the cooling liquid heating to have mobility, and electric heater only heats the inside cooling liquid of microcirculation, preheats efficiently.

When the water level sensor detects that the cooling water amount in the small circulation is small, the normally open electromagnetic valve is switched on to open water supplement, and the normally open electromagnetic valve is switched on for set time and then is switched off to stop water supplement.

The position of the water tank is higher than that of the preheating system pipeline, and after the normally open electromagnetic valve is switched on, cooling liquid in the water tank flows into the pipeline due to gravity, so that water is supplemented in the pipeline.

A water level sensor is arranged in the water tank, and when water shortage in the water tank is detected, the water tank gives an alarm to prompt water adding.

The engine preheating system protected by the invention has the advantages of simple structure, simplicity and convenience in operation and higher efficiency, and can effectively solve the problems of difficulty in starting and larger abrasion of the engine in winter.

Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.