CN110700950A - Control system and control method for reducing engine flameout process jitter through in-cylinder brake control - Google Patents
Control system and control method for reducing engine flameout process jitter through in-cylinder brake control Download PDFInfo
- Publication number
- CN110700950A CN110700950A CN201911195988.0A CN201911195988A CN110700950A CN 110700950 A CN110700950 A CN 110700950A CN 201911195988 A CN201911195988 A CN 201911195988A CN 110700950 A CN110700950 A CN 110700950A
- Authority
- CN
- China
- Prior art keywords
- engine
- control
- cylinder
- cylinder brake
- exhaust valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/04—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation using engine as brake
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The invention discloses a control system and a control method for reducing engine flameout process jitter through in-cylinder brake control. The control system for reducing the shaking of the engine flameout process through the in-cylinder brake control comprises: an engine having a plurality of cylinders, and a valve rocker arm, an exhaust valve drive axle, and an exhaust valve provided on each cylinder; the cylinder brake is arranged on the exhaust valve and used for driving the exhaust valve to open or close; the in-cylinder brake electromagnetic valve is connected with the in-cylinder brake; and the electric control unit is in control connection with the in-cylinder brake solenoid valve and can control the in-cylinder brake solenoid valve to drive the in-cylinder brake to open or close the exhaust valve according to different running conditions of the engine. The control system and the control method thereof for reducing the shaking in the flameout process of the engine through in-cylinder brake control inhibit and consume the rotation energy of the flywheel, so that the shaking and reverse rotation phenomena can not be generated.
Description
Technical Field
The invention relates to the field of engines, in particular to a control system and a control method for reducing engine flameout process jitter through in-cylinder brake control.
Background
At present, in the process of flameout and shutdown of a general diesel engine, the engine is reduced from the idle speed (generally 600r/min-900r/min) to 0r/min through the self friction resistance, and the larger the self friction resistance is, the shorter the shutdown time is. The rear end of the engine is generally provided with a flywheel, the flywheel has certain rotational inertia in the rotating process, the rotational inertia is related to the self weight of the flywheel and the rotating speed of the flywheel, and the heavier the flywheel is, the higher the rotating speed is, the larger the rotational inertia is generated by the flywheel. Through a large number of practices, the rotation of the flywheel still drives the engine to complete four work cycles of air suction, compression, work application and exhaust in the rear section (namely about 150r/min-0r/min) of flameout rotation speed reduction of the engine, in the work application process, although the engine does not inject oil, compressed high-pressure gas still applies work to a piston to generate thrust, the more fresh air is sucked in the air suction process, the greater expansion power is generated in the work application process, the greater the expansion power is, the greater the impact is generated in the flameout process, and the phenomena of vibration, shaking or resonance are generated in the flameout and shutdown processes of the engine and the whole vehicle, so that the comfort is influenced.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide a control system and a control method for reducing the shaking of an engine in the flameout process through in-cylinder brake control, which have simple and reasonable structure.
To achieve the above object, the present invention provides a control system for reducing engine stall jitter through in-cylinder brake control, comprising: an engine having a plurality of cylinders, and a valve rocker arm, an exhaust valve drive axle, and an exhaust valve provided on each cylinder; the cylinder brake is arranged on the exhaust valve and used for driving the exhaust valve to open or close; the in-cylinder brake electromagnetic valve is connected with the in-cylinder brake; and the electric control unit is in control connection with the in-cylinder brake solenoid valve and can control the in-cylinder brake solenoid valve to drive the in-cylinder brake to open or close the exhaust valve according to different running conditions of the engine.
In a preferred embodiment, an in-cylinder brake solenoid valve is provided on the rocker arm or the exhaust valve drive axle.
In a preferred embodiment, the air intake end of the engine is provided with an engine intake manifold, a supercharger, a throttle valve, and an air cleaner.
The invention also provides a control method of the control system for reducing the shake of the engine in the flameout process through in-cylinder brake control, in the flameout and shutdown process, the in-cylinder brake electromagnetic valve is controlled by the electric control unit to drive the in-cylinder brake to open the exhaust valve in advance in the compression and expansion strokes of the engine, so that the compressed gas in the cylinder is released, the impact of the expansion work in the working stroke is reduced, and the balance is further achieved with the mechanical resistance in the flameout and shutdown process of the engine to eliminate the vibration.
Compared with the prior art, the control system and the control method for reducing the engine flameout process jitter through in-cylinder brake control have the following beneficial effects: according to the control system and the control method for reducing the engine stalling process jitter through in-cylinder brake control, in the stalling and stopping process, the exhaust valve is opened through the in-cylinder brake in the compression and expansion strokes to reduce and release compressed gas in the cylinder, the impact of expansion work in the working stroke is reduced, and therefore the mechanical resistance in the engine stalling and stopping process is balanced to eliminate vibration.
Drawings
Fig. 1 is a schematic diagram of a control system for reducing engine stall process judder by in-cylinder brake control according to a first embodiment of the invention.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
The shake of the engine in the flameout process is caused by the fact that the gas compression and expansion work accelerates the rotation of the flywheel due to the action of highly compressed gas on the piston in the work stroke of the engine, and the rotating speed of the engine is reduced due to the action of mechanical resistance, so that the shake is caused by the imbalance of the gas expansion work and the mechanical resistance in the flameout process. The larger the work of gas expansion is, the larger the vibration is probably caused, and the work of gas expansion is related to the amount of fresh air sucked in the suction stroke of the engine or the amount of gas released in the compression stroke of the engine, and the more the gas enters the cylinder, the larger the work of expansion is.
To solve the above problems, as shown in fig. 1, a specific structure of a control system for reducing the judder during the engine stall through in-cylinder brake control according to a preferred embodiment of the present invention includes: the system comprises an engine 1, an electronic control unit 8, an in-cylinder brake electromagnetic valve and an in-cylinder brake 9. The compression and working strokes control the in-cylinder brake electromagnetic valve and the in-cylinder brake 9 through the electric control unit 8, so that the exhaust valve is closed later or the exhaust valve is opened in advance to release gas, the impact of expansion work of the working stroke is reduced, and the mechanical resistance in the flameout and shutdown processes of the engine is balanced to eliminate vibration.
Specifically, the engine 1 has a plurality of cylinders, and a rocker arm, an exhaust valve drive axle, and an exhaust valve provided in each cylinder, and the rocker arm drives the exhaust valve to open or close via the exhaust valve drive axle.
Preferably, an intake end of the engine 1 is provided with an engine intake manifold 4, a supercharger 5, a throttle valve 6, and an air cleaner 7.
An in-cylinder brake 9 is mounted on the exhaust valve for actuating the exhaust valve to open or close.
The in-cylinder brake electromagnetic valve is arranged on the valve rocker or the exhaust valve drive axle, is connected with the in-cylinder brake 9 and is used for driving the in-cylinder brake to control the exhaust valve to open or close.
The electric control unit 8 is connected with the in-cylinder brake solenoid valve in a control mode, opening and closing of the exhaust valve required under various working conditions can be flexibly controlled according to different running working conditions of the engine, in four working strokes of the engine, when the engine is in a compression stroke and an expansion stroke, the in-cylinder brake is opened through the solenoid valve, the exhaust valve is opened by one opening degree to release gas, and therefore high-pressure compressed gas cannot be formed in the opened cylinder of the exhaust valve of the expansion stroke engine, and expansion work cannot be performed.
The control method for reducing the engine stall process judder through in-cylinder brake control according to the preferred embodiment of the invention specifically includes: in the flameout and shutdown process, the electric control unit 8 controls the in-cylinder brake electromagnetic valve to drive the in-cylinder brake 9 to open the exhaust valve in advance in the compression and expansion strokes of the engine, so that the compressed gas in the cylinder is released, the impact of the expansion work in the working stroke is reduced, and the mechanical resistance in the flameout and shutdown process of the engine is balanced to eliminate vibration. Namely, the electronic control unit utilizes the exhaust valves of the compression stroke and the expansion stroke to open and release gas in the flameout and shutdown process of the engine, reduces the gas compression and expansion work, even negative expansion work, to inhibit and consume the rotation energy of the flywheel, does not do expansion work, and the operation performance of the engine is well balanced with the mechanical resistance, thereby avoiding the phenomena of shaking and reversion.
In conclusion, in the flameout and stop process of the control system and the control method thereof for reducing the engine flameout process jitter through the in-cylinder brake, the exhaust valve is opened through the in-cylinder brake in the compression and expansion stroke to reduce and release the compressed gas in the cylinder, so that the impact of the expansion work in the working stroke is reduced, and the mechanical resistance in the flameout and stop process of the engine is balanced to eliminate the vibration.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (4)
1. A control system for reducing engine stall process judder through in-cylinder brake control, comprising:
an engine having a plurality of cylinders, and a valve rocker arm, an exhaust valve drive axle, and an exhaust valve provided on each cylinder;
the cylinder brake is arranged on the exhaust valve and used for driving the exhaust valve to open or close;
the in-cylinder brake electromagnetic valve is connected with the in-cylinder brake; and
and the electric control unit is in control connection with the in-cylinder braking electromagnetic valve and can control the in-cylinder braking electromagnetic valve to drive the in-cylinder brake to open or close the exhaust valve according to different running conditions of the engine.
2. The control system for reducing engine stall process jitter through in-cylinder braking control of claim 1, wherein the in-cylinder braking solenoid valve is disposed on the valve rocker arm or exhaust valve drive axle.
3. A control system for reducing engine misfire process jitter through in-cylinder brake control as recited in claim 1 wherein the intake end of the engine is provided with an engine intake manifold, a supercharger, a throttle valve and an air cleaner.
4. A control method of a control system for reducing the shake of an engine during the flameout process through in-cylinder brake control according to any one of claims 1 to 3, characterized in that during the flameout process, an in-cylinder brake solenoid valve is controlled by an electronic control unit to drive an in-cylinder brake to open an exhaust valve in advance during the compression and expansion strokes of the engine, so as to release the compressed gas in the cylinder, reduce the impact of the expansion work during the power stroke, and further reach the balance with the mechanical resistance during the flameout process of the engine to eliminate the vibration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911195988.0A CN110700950A (en) | 2019-11-29 | 2019-11-29 | Control system and control method for reducing engine flameout process jitter through in-cylinder brake control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911195988.0A CN110700950A (en) | 2019-11-29 | 2019-11-29 | Control system and control method for reducing engine flameout process jitter through in-cylinder brake control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110700950A true CN110700950A (en) | 2020-01-17 |
Family
ID=69206905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911195988.0A Pending CN110700950A (en) | 2019-11-29 | 2019-11-29 | Control system and control method for reducing engine flameout process jitter through in-cylinder brake control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110700950A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113719362A (en) * | 2021-08-02 | 2021-11-30 | 东风康明斯发动机有限公司 | Diesel engine flameout jitter mitigation method, control system and computer storage medium |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004060537A (en) * | 2002-07-29 | 2004-02-26 | Toyota Motor Corp | Exhaust emission control device and exhaust emission control method for internal combustion engine |
| US20100108027A1 (en) * | 2005-12-28 | 2010-05-06 | Hitachi,Ltd. | Variable valve actuation system of internal combustion engine |
| CN103758645A (en) * | 2013-12-20 | 2014-04-30 | 联合汽车电子有限公司 | Hybrid electric vehicle engine control method and device |
| CN104421009A (en) * | 2013-08-30 | 2015-03-18 | 上海尤顺汽车部件有限公司 | Method for improving low-speed performance of multi-cylinder engine |
| CN109882295A (en) * | 2019-03-20 | 2019-06-14 | 陕西重型汽车有限公司 | A kind of control system that engine quickly stops working |
| CN210858956U (en) * | 2019-11-29 | 2020-06-26 | 广西玉柴机器股份有限公司 | Control system for reducing engine flameout process jitter through in-cylinder brake control |
-
2019
- 2019-11-29 CN CN201911195988.0A patent/CN110700950A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004060537A (en) * | 2002-07-29 | 2004-02-26 | Toyota Motor Corp | Exhaust emission control device and exhaust emission control method for internal combustion engine |
| US20100108027A1 (en) * | 2005-12-28 | 2010-05-06 | Hitachi,Ltd. | Variable valve actuation system of internal combustion engine |
| CN104421009A (en) * | 2013-08-30 | 2015-03-18 | 上海尤顺汽车部件有限公司 | Method for improving low-speed performance of multi-cylinder engine |
| CN103758645A (en) * | 2013-12-20 | 2014-04-30 | 联合汽车电子有限公司 | Hybrid electric vehicle engine control method and device |
| CN109882295A (en) * | 2019-03-20 | 2019-06-14 | 陕西重型汽车有限公司 | A kind of control system that engine quickly stops working |
| CN210858956U (en) * | 2019-11-29 | 2020-06-26 | 广西玉柴机器股份有限公司 | Control system for reducing engine flameout process jitter through in-cylinder brake control |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113719362A (en) * | 2021-08-02 | 2021-11-30 | 东风康明斯发动机有限公司 | Diesel engine flameout jitter mitigation method, control system and computer storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0610222B1 (en) | Engine operation using fully flexible valve and injection events | |
| JP6128081B2 (en) | Internal combustion engine system | |
| CN102200061B (en) | Turbocharged engine and the method controlling this turbocharged engine | |
| CN105849398B (en) | Improvements to engine shutdown and restart | |
| JPH02294522A (en) | Cycle convertible engine and its control device | |
| CN210858956U (en) | Control system for reducing engine flameout process jitter through in-cylinder brake control | |
| US20150292399A1 (en) | Altering Engine Combustion Cycle Using Electric Motor-Driven Exhaust and Intake Air Pumps | |
| US5205152A (en) | Engine operation and testing using fully flexible valve and injection events | |
| CN110700950A (en) | Control system and control method for reducing engine flameout process jitter through in-cylinder brake control | |
| US20130340709A1 (en) | Method for controlling an internal combustion engine | |
| JP2011236871A (en) | Control device of internal combustion engine | |
| CN210858953U (en) | Control system for reducing engine flameout process jitter through throttle control | |
| CN201461111U (en) | Cylinder deactivating and oil saving device for engine | |
| JP4007073B2 (en) | Turbocharged engine | |
| CN110761905A (en) | Control system and control method for reducing engine flameout process jitter through throttle control | |
| CN210858954U (en) | Control system for reducing engine flameout process jitter through exhaust throttle control | |
| CN113279866B (en) | Shutdown position finding control method for motorcycle idle speed start-stop system | |
| CN108301892A (en) | The variable inlet and exhaust valve system and control method of internal combustion engine | |
| JP3878572B2 (en) | Method for facilitating starting of an internal combustion engine | |
| JP3030365B2 (en) | Internal combustion engine | |
| CN110714840A (en) | Control system and control method for reducing engine flameout process jitter through exhaust throttle valve control | |
| CN100523462C (en) | Engine motion active control | |
| WO2012062165A1 (en) | Engine having novel structure and working method thereof | |
| CN102003268A (en) | Air-supplementing supercharged four-stroke engine | |
| CN201496115U (en) | Continuous variable gas distribution control system of spark ignition engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200117 |