CN109184922B - Engine stop control system, control method and automobile - Google Patents
Engine stop control system, control method and automobile Download PDFInfo
- Publication number
- CN109184922B CN109184922B CN201811116614.0A CN201811116614A CN109184922B CN 109184922 B CN109184922 B CN 109184922B CN 201811116614 A CN201811116614 A CN 201811116614A CN 109184922 B CN109184922 B CN 109184922B
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- China
- Prior art keywords
- engine
- air inlet
- control valve
- control unit
- crankshaft
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D17/00—Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling
- F02D17/04—Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling rendering engines inoperative or idling, e.g. caused by abnormal conditions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0002—Controlling intake air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
- F02D2009/0201—Arrangements; Control features; Details thereof
- F02D2009/024—Increasing intake vacuum
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
- F02D2009/0201—Arrangements; Control features; Details thereof
- F02D2009/0245—Shutting down engine, e.g. working together with fuel cut-off
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The control system comprises a control unit and an air inlet control valve, wherein the air inlet control valve is arranged between an engine throttle valve and an air filter and used for controlling the communication between the throttle valve and the air filter, the air inlet control valve is electrically connected with the control unit, when the control unit receives an engine flameout signal, the control unit controls the air inlet control valve to be closed, and when an engine crankshaft completely stops rotating, the control unit controls the air inlet control valve to be opened. The engine stop control system and the control method can reduce the continuous entering of air when the engine is stopped, prevent the generation of air flow noise and prevent the engine from continuously burning.
Description
Technical Field
The invention relates to the field of engine stop control, in particular to an engine stop control system, a control method for controlling the stop of an engine by adopting the control system and an automobile with the control system.
Background
With the higher and higher requirements of national policy on clean energy, the new energy hybrid power also puts higher requirements on the heat efficiency of the engine; among them, three-cylinder machines (or even two-cylinder, single-cylinder machines) are a very important solution. The three-cylinder machine has small volume, light weight, simple structure and low price. However, the three-cylinder machine has a big problem that the smoothness (riding comfort) of the running and starting shutdown states is poor, and the requirement of a consumer on the riding feeling cannot be met.
When the engine is stopped, the throttle valve of the common plate stops working but is still in an opening state, and the crankshaft of the engine continues to rotate under the action of inertia. Air continues to enter the air passage through the opening of the throttle, and at this time, the air flowing in the air passage can generate noise, and the NVH performance of the engine is not ideal.
Disclosure of Invention
In view of the above, the present invention provides an engine stop control system, an engine stop control method and an automobile, which can reduce the continuous intake of air when the engine is stopped, prevent the generation of air flow noise, and prevent the engine from continuously burning.
The invention provides an engine stop control system which comprises a control unit and an air inlet control valve, wherein the air inlet control valve is arranged between an engine throttle valve and an air filter and used for controlling the communication between the throttle valve and the air filter, the air inlet control valve is electrically connected with the control unit, when the control unit receives an engine flameout signal, the control unit controls the air inlet control valve to be closed, and when an engine crankshaft completely stops rotating, the control unit controls the air inlet control valve to be opened.
Further, the engine stop control system further comprises a BCM, the control unit is an ECU, when the BCM receives an engine flameout signal, the BCM sends the signal to the ECU, and the ECU controls the air inlet control valve to be closed.
Further, the engine stop control system further includes a crank position sensor, and the control unit detects a rotation speed of the engine crankshaft via the crank position sensor, and controls the air intake control valve to be reopened when the engine crankshaft stops rotating.
Furthermore, a first preset time is prestored in the control unit, when the control unit receives the engine flameout signal, the control unit controls the air inlet control valve to be opened again after the first preset time, and the first preset time is greater than or equal to the time from flameout of the engine to complete stop of rotation of the engine crankshaft.
Further, the intake control valve is provided at an end portion of an intake pipe near an end of the air cleaner, or at an end portion of the intake pipe near an end of the throttle valve, or in the intake pipe.
The invention also provides an engine stop control method which is based on the engine stop control system and comprises the following steps:
s1: receiving an engine stall signal;
s2: controlling the air inlet control valve to be closed;
s3: and controlling the air inlet control valve to be opened again after the crankshaft of the engine stops rotating completely.
Further, in the step of controlling the intake control valve to be reopened after the engine crankshaft is completely stopped, the method may further include the steps of: and detecting a signal of a crankshaft sensor, and controlling the opening of the air inlet control valve when the crankshaft of the engine completely stops rotating.
Further, in the step of controlling the intake control valve to be reopened after the engine crankshaft is completely stopped, the method may further include the steps of: and after receiving a first preset time of the engine flameout signal, controlling the air inlet control valve to be opened again, wherein the first preset time is more than or equal to the time from the flameout of the engine to the complete stop of the rotation of the crankshaft of the engine.
The invention further provides an automobile which comprises the engine stop control system.
In summary, in the present invention, by providing an additional air intake control valve outside the throttle valve, after receiving an engine stall signal, the control unit controls the air intake control valve to close, and the air intake control valve prevents outside air from entering the engine, which firstly can eliminate the impact on the engine caused by incomplete closing of the throttle valve and air still entering the engine when the engine is stopped; secondly, the vacuum degree of the intake manifold can be increased, the compression pressure is reduced, and the torsional vibration of the engine is reduced; finally, the pumping loss can be increased, the downtime can be shortened, and the purpose of improving flameout noise can be achieved; further, after the engine crankshaft completely stops rotating, the control unit controls the air inlet control valve to be opened, and the air inlet pipeline is restored to a communicated state, so that the influence on the starting of a subsequent engine is prevented. Finally, because in the invention, the throttle valve can not be completely closed during the stop process of the engine, the impact on the engine when the throttle valve is closed is reduced, and the abnormal sound of the engine is further reduced.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic structural diagram of an engine stop control system according to an embodiment of the present invention.
FIG. 2 is a graph comparing noise improvement in the prior art with engine shutdown control using the engine shutdown control system provided in FIG. 1.
FIG. 3 is a logic control diagram of an engine shutdown control method provided by an embodiment of the present invention.
Detailed Description
To further explain the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description is given with reference to the accompanying drawings and preferred embodiments.
The invention provides an engine stop control system, an engine stop control method and an automobile.
Fig. 1 is a schematic structural diagram of an engine stop control system according to an embodiment of the present invention, and as shown in fig. 1, the engine stop control system according to the present invention includes a control unit 10 and an air intake control valve 20, the air intake control valve 20 is disposed between a throttle valve 31 and an air cleaner 32 of an engine 41, the air cleaner 32 is in communication with the throttle valve 31 and is electrically connected to the control unit 10, the air intake control valve 20 is controlled to be closed to block communication of an intake pipe 33 and prevent air from entering the engine 41 when the control unit 10 receives a stall signal from the engine 41, and the control unit 10 controls the air intake control valve 20 to be opened to restore communication in the intake pipe 33 when a crankshaft of the engine completely stops rotating.
In the present embodiment, an additional air intake control valve 20 is provided outside the throttle valve 31, and when the engine 41 stall signal is received, the control unit 10 controls the air intake control valve 20 to close, and the air intake control valve 20 prevents outside air from entering the engine 41, which can firstly eliminate the impact on the engine 41 caused by incomplete closing of the throttle valve 31 and the gas still entering the engine 41 when the engine 41 is stopped; secondly, the vacuum degree of the intake manifold can be increased, the compression pressure can be reduced, and the torsional vibration of the engine 41 can be reduced; finally, the pumping loss can be increased, the downtime can be shortened, and the purpose of improving flameout noise can be achieved; further, when the engine crankshaft completely stops rotating, the control unit 10 controls the intake control valve 20 to open, and the intake pipe 33 returns to the communicating state to prevent an influence on the subsequent start of the engine 41. Finally, since in the present invention, the throttle valve 31 may not be fully closed during the stop of the engine 41, which in turn reduces the impact on the engine 41 when the throttle valve 31 is closed, further reducing the abnormal noise of the engine 41.
Further, in the present embodiment, the control unit 10 may be an ECM (engine control module, engine 41 control unit 10) that transmits a signal to the ECM when a BCM (body control module, vehicle body control unit 10) receives the engine 41 stall signal, and controls the intake control valve 20 to close to prevent outside air from entering the engine 41.
Further, in the present embodiment, the intake air control valve 20 may be provided at an end portion of the intake pipe 33 near an end of the air cleaner 32, at an end portion of the intake pipe 33 near an end of the throttle valve 31, or in the intake pipe 33, as long as the intake air control valve 20 can be made to block the intake of the outside air into the engine 41 when closed. The intake control valve 20 may be, but is not limited to, a solenoid valve or an electric valve.
Further, the control unit 10 may detect the rotation speed of the engine crankshaft via a crankshaft position sensor, and when the engine crankshaft stops rotating, the control unit 10 controls the intake control valve 20 to be opened again.
In another embodiment of the present invention, the control unit 10 is pre-stored with the first preset time, and the control unit 10 may automatically control the opening of the air intake control valve 20 after the first preset time, for example, 3S, after receiving the engine stall signal. As will be appreciated, the first predetermined time depends on the performance of the engine 41, which requires a time greater than or equal to the time from when the engine 41 stalls until the engine crankshaft stops rotating.
Fig. 2 is a graph comparing noise improvement in the prior art with the control of the stop of the engine 41 using the engine stop control system provided in fig. 1. Fig. 2 shows a graph comparing noise in 3 seconds before the reciprocal of the stop process of the engine 41 in the engine 41 of the prior art 41 and the engine 41 having the engine stop control system provided by the present invention. The abscissa of the graph represents time, and the ordinate represents the amplitude of the engine 41 (i.e., the noise of the engine 41) in the graph, point a represents the timing at which the engine 41 stalls, and point B represents the timing at which the engine crankshaft stops rotating. As can be seen from fig. 2, the engine 41 provided with the engine stop control system provided by the present invention has a significantly reduced amplitude in the stop phase and a reduced stop time to some extent, compared to the prior art.
The invention also provides a method for controlling the stop of the engine 41, which is based on the engine stop control system and comprises the following steps:
s1: receiving a signal that the engine 41 is turned off;
s2: controlling the intake control valve 20 to close;
s3: after the engine crankshaft completely stops rotating, the intake control valve 20 is controlled to be opened again.
Further, the step of controlling the opening of the intake control valve 20 after the engine crankshaft completely stops rotating includes the steps of: the signal of the crank position sensor is detected, and when the crank stops rotating completely, the intake control valve 20 is controlled to open.
In another embodiment, this step includes controlling the intake air control valve 20 to open after a first predetermined time, which is greater than or equal to the time from the stalling of the engine 41 to the complete stop of the rotation of the engine crankshaft, is received upon the stall signal of the engine 41.
As described above, in the present invention, by providing an additional intake control valve 20 in addition to the throttle valve 31, the control unit 10 controls the intake control valve 20 to close after receiving a stall signal of the engine 41, and the intake control valve 20 prevents outside air from entering the engine 41, which can eliminate, first of all, the impact on the engine 41 caused by incomplete closing of the throttle valve 31 and the gas still entering the engine 41 when the engine 41 is stopped; secondly, the vacuum degree of the intake manifold can be increased, the compression pressure can be reduced, and the torsional vibration of the engine 41 can be reduced; finally, the pumping loss can be increased, the downtime can be shortened, and the purpose of improving flameout noise can be achieved; further, when the engine crankshaft completely stops rotating, the control unit 10 controls the intake control valve 20 to open, and the intake pipe 33 returns to the communicating state to prevent an influence on the subsequent start of the engine 41. Finally, since in the present invention, the throttle valve 31 may not be fully closed during the stop of the engine 41, which in turn reduces the impact on the engine 41 when the throttle valve 31 is closed, further reducing the abnormal noise of the engine 41.
The invention also provides a vehicle comprising the engine stop control system, and other technical features of the vehicle are referred to in the prior art and are not described herein again.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. An engine stop control system characterized by: the control device comprises a control unit and an air inlet control valve, wherein the air inlet control valve is arranged between an engine throttle valve and an air filter and used for controlling the communication between the throttle valve and the air filter, the air inlet control valve is electrically connected with the control unit, when the control unit receives an engine flameout signal, the control unit controls the air inlet control valve to be closed, and when an engine crankshaft completely stops rotating, the control unit controls the air inlet control valve to be opened.
2. The engine stop control system according to claim 1, characterized in that: the engine stop control system further comprises a BCM, the control unit is an ECU, when the BCM receives an engine flameout signal, the BCM sends the signal to the ECU, and the ECU controls the air inlet control valve to be closed.
3. The engine stop control system according to claim 1, characterized in that: the engine stop control system further comprises a crankshaft position sensor, the control unit detects the rotating speed of the engine crankshaft through the crankshaft position sensor, and when the engine crankshaft stops rotating, the control unit controls the air inlet control valve to be opened again.
4. The engine stop control system according to claim 1, characterized in that: the control unit is internally pre-stored with a first preset time, when the control unit receives the engine flameout signal, the control unit controls the air inlet control valve to be opened again after the first preset time, and the first preset time is more than or equal to the time from flameout of the engine to complete stop of rotation of the engine crankshaft.
5. The engine stop control system according to claim 1, characterized in that: the air inlet control valve is arranged at the end part of one end, close to the air filter, of the air inlet pipeline, or at the end part of one end, close to the throttle valve, of the air inlet pipeline, or in the air inlet pipeline.
6. An engine stop control method characterized by: the engine stop control method is based on the engine stop control system according to any one of claims 1 to 5, and includes the steps of:
s1: receiving an engine stall signal;
s2: controlling the air inlet control valve to be closed;
s3: and controlling the air inlet control valve to be opened again after the crankshaft of the engine stops rotating completely.
7. The engine stop control method according to claim 6, characterized in that: in the step of controlling the intake control valve to reopen after the engine crankshaft is completely stopped, the method further includes the steps of: and detecting a signal of a crankshaft sensor, and controlling the opening of the air inlet control valve when the crankshaft of the engine completely stops rotating.
8. The engine stop control method according to claim 6, characterized in that: in the step of controlling the intake control valve to reopen after the engine crankshaft is completely stopped, the method further includes the steps of: and after receiving a first preset time of the engine flameout signal, controlling the air inlet control valve to be opened again, wherein the first preset time is more than or equal to the time from the flameout of the engine to the complete stop of the rotation of the crankshaft of the engine.
9. An automobile, characterized in that: the automobile includes the engine stop control system according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811116614.0A CN109184922B (en) | 2018-09-25 | 2018-09-25 | Engine stop control system, control method and automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811116614.0A CN109184922B (en) | 2018-09-25 | 2018-09-25 | Engine stop control system, control method and automobile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109184922A CN109184922A (en) | 2019-01-11 |
| CN109184922B true CN109184922B (en) | 2020-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811116614.0A Active CN109184922B (en) | 2018-09-25 | 2018-09-25 | Engine stop control system, control method and automobile |
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| CN (1) | CN109184922B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111425305B (en) * | 2020-04-01 | 2022-06-07 | 广西玉柴机器股份有限公司 | Air-break valve with high safety |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006258078A (en) * | 2005-03-18 | 2006-09-28 | Toyota Motor Corp | Control device for engine |
| JP5115233B2 (en) * | 2008-02-19 | 2013-01-09 | いすゞ自動車株式会社 | Engine stop control device |
| JP2010014072A (en) * | 2008-07-04 | 2010-01-21 | Toyota Motor Corp | Engine stop control device for hybrid system |
| JP5083417B2 (en) * | 2010-03-25 | 2012-11-28 | 株式会社デンソー | Intake device for vehicle |
| JP6591797B2 (en) * | 2015-06-19 | 2019-10-16 | 株式会社Ｓｕｂａｒｕ | Internal combustion engine |
| CN107237698A (en) * | 2016-03-29 | 2017-10-10 | 牛刚学 | The method and device of internal combustion engine cylinder deactivation oil-break |
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| CN109184922A (en) | 2019-01-11 |
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Effective date of registration: 20190326 Address after: 550014 No. 123 Yunhuan East Road, Baiyun District, Guiyang City, Guizhou Province Applicant after: Guizhou Geely Engine Co., Ltd. Applicant after: Zhejiang Geely Holding Group Co., Ltd. Address before: 310051 No. 1760, Jiangling Road, Hangzhou, Zhejiang, Binjiang District Applicant before: Zhejiang Geely Holding Group Co., Ltd. Applicant before: Guiyang Jili Engine Co., Ltd. |
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