阅读说明：本技术 一种油气分离器的控制方法、控制装置及乘用车 (Control method and control device for oil-gas separator and passenger vehicle ) 是由 张国宇 张蒙 刘正勇 李安 于 2021-08-25 设计创作，主要内容包括：本发明属于汽车技术领域,公开了一种油气分离器的控制方法、油气分离器及乘用车,该控制方法用于控制乘用车的油气分离器的分离功率,从而实现降低发动机油耗和噪声的目的,通过发动机的制动平均有效压力和发动机的转速控制油气分离器的叠片的转速,以调整油气分离器的分离功率；通过电磁阀控制润滑油进入油气分离器的流量,以控制油气分离器的叠片的转速,从而控制油气分离器的分离功率。该油气分离器的油气分离效率高。(The invention belongs to the technical field of automobiles, and discloses an oil-gas separator control method, an oil-gas separator and a passenger car, wherein the control method is used for controlling the separation power of the oil-gas separator of the passenger car, so that the aims of reducing the oil consumption and the noise of an engine are fulfilled, and the rotating speed of a lamination of the oil-gas separator is controlled through the braking average effective pressure of the engine and the rotating speed of the engine so as to adjust the separation power of the oil-gas separator; the flow rate of the lubricating oil entering the oil-gas separator is controlled through the electromagnetic valve so as to control the rotating speed of the lamination of the oil-gas separator and further control the separation power of the oil-gas separator. The oil-gas separation efficiency of the oil-gas separator is high.)

1. A control method of an oil separator for controlling a separation power of an oil separator (1) of a passenger car, characterized by comprising the steps of:

s1, obtaining the brake average effective pressure of the engine of the passenger car and the rotating speed of the engine;

s2, controlling the rotating speed of the lamination of the oil-gas separator (1) within a preset range according to the brake mean effective pressure of the engine and the rotating speed of the engine so as to control the separating power of the oil-gas separator (1).

2. A control method of an oil separator as claimed in claim 1, characterized in that the rotation speed of the lamination of the oil separator (1) is controlled to 2800rpm to 3200rpm when the brake mean effective pressure of the engine is less than or equal to 10bar and the rotation speed of the engine is less than or equal to 3500 rpm.

3. A control method of an oil separator as in claim 1 characterized by controlling the rotation speed of the lamination of the oil separator (1) at 4800 rpm-5200 rpm when the brake mean effective pressure of the engine is less than or equal to 10bar and the rotation speed of the engine is greater than 3500 rpm.

4. A control method of an oil separator as claimed in claim 1 wherein the rotation speed of the laminations of the oil separator (1) is controlled at 3800rpm to 4200rpm when the brake mean effective pressure of the engine is greater than 10bar and the rotation speed of the engine is less than or equal to 3500 rpm.

5. A control method of an oil separator as claimed in claim 1, characterized in that the rotation speed of the lamination of the oil separator (1) is controlled between 6700rpm and 7300rpm when the brake mean effective pressure of the engine is more than 10bar and the rotation speed of the engine is more than 3500 rpm.

6. The control method of the oil-gas separator according to any one of claims 1-5, wherein the passenger vehicle comprises an electromagnetic valve (2) and an ECU control module, the electromagnetic valve (2) is electrically connected with the ECU control module, and the oil passage of the oil-gas separator (1) is communicated with a main oil passage (3) of lubricating oil of the engine through the electromagnetic valve (2) and a pipeline; the step S2 includes:

the ECU control module controls the opening of the electromagnetic valve (2) to control the flow of lubricating oil entering the oil-gas separator (1) so as to control the rotating speed of the lamination of the oil-gas separator (1).

7. A control method of an oil-gas separator as claimed in claim 6, characterized in that the electromagnetic valve (2) is a proportional electromagnetic valve, and the duty ratio of the proportional electromagnetic valve is adjusted by the ECU control module to control the flow of the lubricating oil into the oil-gas separator (1).

8. A control method for an oil separator as claimed in claim 7, wherein the lubricating oil is filtered using a filter assembly before the lubricating oil drives the lamination stack to rotate.

9. A control apparatus of an oil separator, characterized in that the control apparatus comprises:

the engine rotating speed detection module is used for detecting the rotating speed of the engine;

the engine brake mean effective pressure detection module is used for detecting the brake mean effective pressure of the engine;

and the lamination rotating speed control module is used for controlling the rotating speed of the laminations of the oil-gas separator (1) according to the brake mean effective pressure and the rotating speed.

10. Passenger vehicle, characterized in that it comprises a vehicle body, an engine and an oil-gas separator (1), the oil-gas separator (1) controls the separation power of the oil-gas separator (1) by using the control method of the oil-gas separator according to any one of claims 1-8.

Technical Field

The invention relates to the technical field of automobiles, in particular to a control method and a control device of an oil-gas separator and a passenger vehicle.

Background

Crankcase ventilation systems are important components of engines, and piston blow-by gas needs to be effectively separated before entering a combustion chamber for re-combustion, so that the carrying amount of engine oil is reduced as much as possible, and the consumption of the engine oil is reduced. With the increasing strictness of emission regulations, crankcase ventilation systems are becoming the subject of the regulations. Meanwhile, along with the gradual rise of the compression ratio of the engine, the carrying amount of the engine oil is reduced, and the engine knock tendency is also inhibited.

At present, an oil-gas separator is used as a core part of a crankcase ventilation system, and the technical scheme in a passenger vehicle is mostly labyrinth type or cyclone type, the two schemes are simple in structure and low in cost, but the problem of low separation efficiency exists; at present, an active oil-gas separator is adopted in a medium-heavy diesel engine, so that the separation efficiency of the oil-gas separator can be greatly improved; the active oil-gas separator for the conventional medium and heavy diesel engine realizes two functions by sharing one external auxiliary power, namely filtering impurities in engine oil and separating oil from gas so as to solve the problem of poor separation effect of the conventional oil-gas separator.

Disclosure of Invention

According to one aspect of the invention, a control method of an oil-gas separator is provided, so that the separation power of an active oil-gas separator can be adjusted according to requirements.

In order to achieve the purpose, the invention adopts the following technical scheme:

the invention provides a control method of an oil-gas separator, which is used for controlling the separation power of the oil-gas separator of a passenger vehicle, and comprises the following steps:

s1, obtaining the brake average effective pressure of the engine of the passenger car and the rotating speed of the engine;

and S2, controlling the rotating speed of the lamination of the oil-gas separator within a preset range according to the brake average effective pressure of the engine and the rotating speed of the engine so as to control the separating power of the oil-gas separator.

Preferably, when the average effective braking pressure of the engine is less than or equal to 10bar and the rotating speed of the engine is less than or equal to 3500rpm, the rotating speed of the lamination of the oil-gas separator is controlled to be 2800 rpm-3200 rpm.

Preferably, when the average effective pressure of the engine during braking is less than or equal to 10bar and the rotating speed of the engine is greater than 3500rpm, the rotating speed of the lamination of the oil-gas separator is controlled to be 4800 rpm-5200 rpm.

Preferably, when the average effective pressure of the engine during braking is more than 10bar and the rotating speed of the engine is less than or equal to 3500rpm, the rotating speed of the lamination of the oil-gas separator is controlled to be 3800 rpm-4200 rpm.

Preferably, when the average effective braking pressure of the engine is more than 10bar and the rotating speed of the engine is more than 3500rpm, the rotating speed of the lamination of the oil-gas separator is controlled to be 6700 rpm-7300 rpm.

Preferably, the passenger car comprises an electromagnetic valve and an ECU control module, the electromagnetic valve is electrically connected with the ECU control module, and an oil passage of the oil-gas separator is communicated with a main oil passage of lubricating oil of the engine through the electromagnetic valve and a pipeline; the step S2 includes:

the ECU control module controls the opening of the electromagnetic valve to control the flow of lubricating oil entering the oil-gas separator so as to control the rotating speed of the lamination of the oil-gas separator.

Preferably, the electromagnetic valve is a proportional electromagnetic valve, and the ECU control module adjusts the duty ratio of the proportional electromagnetic valve to control the flow of the lubricating oil entering the oil-gas separator.

The proportional electromagnetic valve can accurately open the size of the valve according to a control instruction sent by the ECU control module, so that the flow of lubricating oil entering the oil-gas separator is accurately controlled, and the separation power of the oil-gas separator is accurately regulated.

Preferably, the lubricating oil is filtered using a filter pack before the lubricating oil drives the laminations to rotate.

This filter subassembly can filter drive oil and gas separator lamination pivoted lubricating oil to impurity in the preventing lubricating oil causes the damage to the spare part in the oil and gas separator, has promoted oil and gas separator's life-span.

According to another aspect of the present invention, there is provided a control device of an oil separator, the control device including:

the engine rotating speed detection module is used for detecting the rotating speed of the engine;

the engine brake mean effective pressure detection module is used for detecting the brake mean effective pressure of the engine;

and the lamination rotating speed control module is used for controlling the rotating speed of the laminations of the oil-gas separator according to the brake average effective pressure and the rotating speed.

According to another aspect of the invention, the passenger vehicle comprises a vehicle body, an engine and an oil-gas separator, wherein the oil-gas separator controls the separation power of the oil-gas separator by adopting a control method of the oil-gas separator.

The invention has the beneficial effects that:

the invention provides a control method of an oil-gas separator, which comprises the steps of firstly obtaining the braking average effective pressure and the rotating speed of an engine of a passenger car through a control device of the passenger car; and then the control device controls the rotating speed of the lamination of the oil-gas separator within a preset range according to the braking average effective pressure of the engine and the rotating speed of the engine so as to control the separating power of the oil-gas separator and control the rotating speed of the oil-gas separator within a reasonable range, thereby achieving the purpose of reducing the oil consumption and the noise of the engine and further improving the performance of the passenger vehicle.

Drawings

FIG. 1 is a control logic diagram of a control method of an oil-gas separator proposed by the present invention;

FIG. 2 is a connection relation diagram of the oil-gas separator, the electromagnetic valve and the main oil gallery of the engine;

fig. 3 is a schematic diagram of a control device according to the present invention.

In the figure:

1. an oil-gas separator; 2. an electromagnetic valve; 3. a main oil gallery;

11. an air inlet; 12. and an air outlet.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

Example one

In the development of modern engines, energy-saving and emission-reducing design becomes an important mark for evaluating the technical advancement of the engines, and how to reduce oil consumption and reduce emission through lean design becomes a problem which is increasingly concerned by designers at present. In the past, the engine adopting the active oil-gas separator has the defects that the air leakage amount is small when the engine is in a medium-low speed working condition due to the fact that the rotating speed cannot be controlled, but the oil-gas separator has high rotating speed, surplus separating capacity, high energy consumption and large noise. How to balance energy consumption and oil-gas separator efficiency and realize control according to needs is more and more concerned by designers.

In view of the above, the present embodiment provides a method for controlling a separation power of an oil separator of a passenger vehicle, so as to achieve a balance between oil consumption of an engine and separation efficiency of the oil separator, thereby reducing oil consumption and noise of the engine, and enabling the oil separator to operate efficiently.

In the embodiment, the passenger vehicle executes the control method through the control device thereof to control the oil-gas separator; specifically, the control method comprises the steps of firstly acquiring the Brake Mean Effective Pressure (BMEP) of an engine of a passenger car and the rotating speed of the engine through a control device of the passenger car; and then the control device controls the rotating speed of the lamination of the oil-gas separator within a preset range according to the braking average effective pressure of the engine and the rotating speed of the engine so as to control the separating power of the oil-gas separator and control the rotating speed of the oil-gas separator within a reasonable range, thereby achieving the purpose of reducing the oil consumption and the noise of the engine and further improving the performance of the passenger vehicle.

It should be mentioned that the control method of the oil-gas separator can preset the brake average effective pressure of the engine and the rotating speed of the engine in advance to provide reference for the rotating speed of the control lamination of the ECU control module; specifically, as shown in fig. 1, when the brake average effective pressure of the engine is less than or equal to 10bar and the rotating speed of the engine is less than or equal to 3500rpm, the control device controls the rotating speed of the lamination of the oil-gas separator to 2800 rpm-3200 rpm; when the average effective braking pressure of the engine is less than or equal to 10bar and the rotating speed of the engine is greater than 3500rpm, the control device controls the rotating speed of the lamination of the oil-gas separator to be 4800 rpm-5200 rpm; when the average effective braking pressure of the engine is more than 10bar and the rotating speed of the engine is less than or equal to 3500rpm, the control device controls the rotating speed of the lamination of the oil-gas separator to be 3800 rpm-4200 rpm; when the average effective braking pressure of the engine is more than 10bar and the rotating speed of the engine is more than 3500rpm, the control device controls the rotating speed of the lamination of the oil-gas separator to be 6700 rpm-7300 rpm.

In order to realize the control of the oil-gas separator, the control device in the embodiment comprises a lamination rotating speed control module, a lamination rotating speed control module and a lamination rotating speed control module, wherein the lamination rotating speed control module is used for controlling the rotating speed of the lamination of the oil-gas separator according to the brake average effective pressure and the rotating speed of the engine; specifically, the lamination rotating speed control module comprises an electromagnetic valve 2 and an ECU control module, the electromagnetic valve 2 is electrically connected with the ECU control module, an oil duct of the oil-gas separator is communicated with a main oil duct of lubricating oil of an engine through the electromagnetic valve 2 and a pipeline (the oil pressure of the lubricating oil in the main oil duct provides pressure through an oil pump on the engine), and the ECU control module controls the flow rate of the lubricating oil entering the oil-gas separator through the electromagnetic valve 2 so as to control the rotating speed of the lamination of the oil-gas separator.

In order to realize accurate control of the flow rate of the lubricating oil, the electromagnetic valve 2 in the embodiment adopts a proportional electromagnetic valve, and the proportional electromagnetic valve can accurately open the size of the valve according to a control instruction sent by the ECU control module, so that the flow rate of the lubricating oil entering the oil-gas separator is accurately controlled, and the separation power of the oil-gas separator is accurately regulated.

In order to provide reference values for the ECU control module, the control device in the embodiment is further provided with an engine rotating speed detection module and an engine brake average effective pressure detection module, wherein the engine rotating speed detection module is electrically connected with the ECU control module and is used for detecting the rotating speed of the engine; the engine brake average effective pressure detection module is electrically connected with the ECU control module and is used for detecting the brake average effective pressure of the engine.

Because the lubricating oil for driving the lamination to rotate is always circulated in an oil pump and a pipeline of an engine, impurities exist in the lubricating oil and can damage parts in the oil-gas separator to a certain extent under the high-speed rotation of the lamination, and therefore the filtering assembly is arranged in the oil-gas separator and used for filtering the lubricating oil entering the oil-gas separator, and the service life of the oil-gas separator is prolonged.

Example two

The embodiment provides a passenger vehicle which comprises a vehicle body, an engine and an oil-gas separator, wherein the oil-gas separator is controlled by a control device of the oil-gas separator, and the separation power of the oil-gas separator is controlled by adopting the control method of the oil-gas separator in the first embodiment.

Since the oil-gas separator can actively control the separation power, the oil-gas separator is also called as an active oil-gas separator; as shown in fig. 3, the control device of the oil-gas separator comprises an engine rotating speed detection module, an engine brake mean effective pressure detection module and a lamination rotating speed control module; the lamination rotating speed control module comprises a proportional solenoid valve and an ECU control module, the ECU control module respectively detects the rotating speed of the engine and the brake average effective pressure of the engine through an engine rotating speed detection module and an engine brake average effective pressure detection module, and then controls the flow of lubricating oil entering the oil-gas separator through the opening degree of the proportional solenoid valve so as to control the rotating speed of the laminations of the oil-gas separator.

As shown in figure 2, an oil passage of the oil-gas separator 1 is communicated with a main oil passage 3 of lubricating oil of an engine through a proportional solenoid valve and a pipeline, gas in a crankcase of the engine enters the oil-gas separator 1 through an air inlet 11 of the oil-gas separator 1, the lubricating oil enters the oil-gas separator 1 through the main oil passage 3, the pipeline and the proportional solenoid valve, so that the lubricating oil drives laminations of the oil-gas separator 1 to rotate at a high speed to efficiently separate the entering gas, and the separated gas enters an air inlet system of the engine to participate in combustion through an air outlet 12 of the oil-gas separator 1.

It should be mentioned that, when the oil-gas separator 1 works, the lamination rotation speed control module may monitor the rotation speed of the engine, the brake average effective pressure of the engine, and the rotation speed of the laminations of the oil-gas separator 1 in real time, and compare or refer these values with preset values in the control method of the oil-gas separator 1 in the first embodiment, and when the brake average effective pressure of the engine and the rotation speed of the engine are in a certain preset interval in the first embodiment, the ECU control module may adjust the duty ratio of the proportional solenoid valve to adjust the flow rate of the lubricating oil in the oil passage of the oil-gas separator 1, so as to perform closed-loop control on the lamination rotation speed of the oil-gas separator 1, thereby implementing closed-loop control on the separation power of the oil-gas separator 1.

It is understood that the lubricating oil for driving the lamination of the gas-oil separator 1 to rotate can also be hydraulic oil.

The oil-gas separator 1 is simple in structure and easy to realize, intelligent closed-loop control over the oil-gas separator can be realized through the laminated rotating speed control module, and the oil-gas separator 1 can work as required under the working conditions of different piston blow-by amounts of an engine, so that the energy consumption of the oil-gas separator 1 is greatly reduced; meanwhile, under the working conditions of low load and low speed of the engine, the rotating speed of the oil-gas separator 1 can be reduced on the premise of not influencing the oil-gas separation effect, and the noise reduction device has positive significance for reducing the noise of the whole engine.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.