CN111980811A - Engine cylinder deactivation control method for reducing engine oil consumption - Google Patents
Engine cylinder deactivation control method for reducing engine oil consumption Download PDFInfo
- Publication number
- CN111980811A CN111980811A CN202010892991.4A CN202010892991A CN111980811A CN 111980811 A CN111980811 A CN 111980811A CN 202010892991 A CN202010892991 A CN 202010892991A CN 111980811 A CN111980811 A CN 111980811A
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- Prior art keywords
- engine
- cylinder deactivation
- cylinder
- cylinders
- oil consumption
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- 230000009849 deactivation Effects 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims description 14
- 239000010705 motor oil Substances 0.000 title claims description 6
- 239000002912 waste gas Substances 0.000 claims abstract description 7
- 230000006835 compression Effects 0.000 claims description 17
- 238000007906 compression Methods 0.000 claims description 17
- 239000003921 oil Substances 0.000 claims description 16
- 239000007789 gas Substances 0.000 description 7
- 239000000446 fuel Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
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
- F02D13/06—Cutting-out cylinders
-
- 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
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- 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
An ECU of the engine is started simultaneously by controlling an engine braking device and the like when the engine runs in a cylinder deactivation mode in which a part of cylinders are stopped, so that part of waste gas or air is introduced into the stopped cylinders, the vacuum degree of the stopped cylinders is reduced, and the oil consumption is reduced.
Description
Technical Field
The invention relates to an engine cylinder deactivation control method for reducing oil consumption and an engine, and belongs to the technical field of engines.
Background
The technology of engine cylinder deactivation has long appeared, and for multi-cylinder engines, when the engine is under low load, the operation of partial cylinders is stopped, so that the working cylinder can be operated in a region with higher load and better economical efficiency, and the heat radiation of the cylinder to the cooling liquid can be reduced, thereby improving the heat efficiency and reducing the fuel consumption. The most common method for realizing cylinder deactivation is the fuel cut-off and gas cut-off method, which makes the intake valve and exhaust valve of the cylinder stop running through a special cylinder deactivation device to keep the valve closed and cut off the fuel supply of the cylinder at the same time, and makes the cylinder close to vacuum when the engine runs, thereby avoiding the loss of the pump gas and achieving the fuel saving effect.
When the engine works in the cylinder deactivation mode, because the stopped cylinder can generate large vacuum degree (negative pressure) in the cylinder when in operation, lubricating oil in a crankcase is easily sucked into the cylinder through a piston ring gap, and therefore the consumption of engine oil is increased.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides an engine cylinder deactivation control method for reducing oil consumption and an engine.
The engine is provided with a cylinder deactivation device at least at an intake valve, and when the engine enters a cylinder deactivation mode in which a part of cylinders are stopped, the vacuum degree of the stopped cylinders is reduced and the oil consumption is reduced by introducing waste gas or air into the stopped cylinders.
Further, the exhaust valve of the engine is provided with a compression release type engine braking device, the compression release type engine braking device is provided with a valve lift range enabling the exhaust valve to be opened for the second time in the intake stroke, when the engine enters a cylinder deactivation mode that a part of cylinders are stopped to run, an Electronic Control Unit (ECU) of the engine controls the compression release type engine braking device of the stopped cylinders to be started, the exhaust valve generated by the compression release type engine braking device is opened for the second time to suck a part of waste gas into the cylinders, the vacuum degree of the cylinders is reduced, and the oil consumption is reduced.
Further, the engine is provided with cylinder deactivation means for keeping the intake valve closed only at the intake valve, and the ECU of the engine activates the cylinder deactivation means while operating the exhaust valve in the valve lift at the time of normal ignition operation when the engine is operated in the cylinder deactivation mode for partial cylinder deactivation.
When the engine enters the cylinder deactivation mode in which a part of cylinders are stopped, the ECU of the engine controls the cylinder deactivation device to start to enable the air inlet valve of the stopped cylinder to be partially opened and enable the cylinder to suck part of air, so that the vacuum degree of the cylinder is reduced, and the oil consumption is reduced.
The invention also provides an engine, and the engine adopts any one of the engine cylinder deactivation control methods for reducing the oil consumption.
The invention has the beneficial effects that: the invention reduces the vacuum degree of the stop cylinder to avoid excessive lubricating oil entering the cylinder, thereby reducing the oil consumption, avoiding the change of the existing piston ring, reducing the development workload and reducing the cost.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic engine diagram of a first embodiment of the present invention;
FIG. 2 is a schematic exhaust valve lift diagram of a compression-release engine braking apparatus in accordance with a first embodiment of the present invention;
FIG. 3 is a schematic illustration of the lift of an intake valve with a partial opening in cylinder deactivation mode in accordance with a third embodiment of the present invention;
Detailed Description
Fig. 1 to 2 illustrate a first embodiment of the present invention, and as shown in fig. 1, a cylinder deactivation device 1A is provided at an intake valve 1 of an engine, the cylinder deactivation device 1A is connected with and controlled by an ECU of the engine, the intake valve 1 can be deactivated and kept closed, and a compression release engine brake device 2A is provided at an exhaust valve 2 of the engine, the compression release engine brake device 2A is connected with and controlled by the ECU of the engine, the compression release engine brake device 2A has a valve lift 21 for opening the exhaust valve 2 twice in an intake stroke, as shown in fig. 2, according to the compression release engine brake operation principle, the engine compresses gas entering the cylinder and then drops compressed air near a compression top dead center position, so as to realize engine braking, the more gas entering the cylinder generates more braking power, and when the engine brake device is started, the exhaust valve 2 is operated according to a valve lift (fig. 2) for engine braking, and a valve lift 21 for opening the exhaust valve 2 twice is provided in an intake stroke of the engine, so that the exhaust valve 2 is opened to suck part of exhaust gas into the cylinder, thereby increasing braking power. When the engine runs in a cylinder deactivation mode in which a part of cylinders are stopped, the ECU of the engine controls the compression release type engine braking device of the stopped cylinder to be started, partial waste gas is sucked into the cylinder through secondary opening of an exhaust valve generated by the compression release type engine braking device, the vacuum degree of the stopped cylinder during running is reduced, and therefore oil consumption is reduced.
The braking power generated by the compression release type engine braking device is mainly generated by compressing air entering the cylinder through the intake valve in the intake stroke, the secondary opening valve lift 21 of the exhaust valve is not too large generally, and the amount of the sucked exhaust gas is less, so that even if the engine braking device is opened by stopping the cylinder when the engine operates in the cylinder deactivation mode in which part of the cylinder is stopped, the braking power generated by the secondary opening of the sucked exhaust gas only by the exhaust valve is less because the intake valve is closed at the moment, and the normal operation of the engine cannot be greatly influenced.
In a second embodiment of the invention, the engine is provided with cylinder deactivation means for keeping the intake valve closed only at the intake valve, and the ECU of the engine controls the cylinder deactivation means to be activated while operating the exhaust valve of the stopped cylinder in the valve lift at the time of normal ignition operation when the engine is operated in the cylinder deactivation mode in which the partial cylinder is stopped. According to the working cycle of the four-stroke engine, in the power stroke, the exhaust valve is usually opened in advance at a crank angle of about 120 degrees before the bottom dead center, and compared with the cylinder deactivation operation mode that the intake valve and the exhaust valve are completely closed, the cylinder deactivation control method of the embodiment enables the exhaust valve to be opened when the cylinder does not reach the maximum vacuum degree in the power stroke, waste gas enters the cylinder, the vacuum degree in the cylinder is reduced, and therefore oil consumption is reduced.
In the third embodiment of the invention, the cylinder deactivation device of the engine is provided with a valve lift 11 which enables an air inlet valve to be partially opened in the cylinder deactivation mode, as shown in fig. 3, when the engine enters the cylinder deactivation mode of partial cylinder stop, the cylinder deactivation device enables the air inlet valve of a stopped cylinder to be partially opened in the air inlet stroke to enable the air in the cylinder to be partially sucked, the vacuum degree of the cylinder is reduced, the oil consumption is reduced, and the sucked air can be discharged through an exhaust valve.
The invention also provides an engine, and the engine adopts any one of the engine cylinder deactivation control methods for reducing the oil consumption.
It should be noted that the above-mentioned embodiments are only preferred embodiments adopted for illustrating the present invention, and the present invention is not to be construed as being limited thereto, and it is apparent to those skilled in the art to which the present invention pertains that the technical solutions described in the above-mentioned embodiments can be further modified, or some technical features can be replaced, combined, and the like without departing from the concept of the present invention, and these should be regarded as the protection scope of the present invention.
Claims (5)
1. The engine cylinder deactivation control method for reducing the oil consumption is characterized by comprising the following steps of: the engine is provided with a cylinder deactivation device at least at an air inlet valve, and when the engine runs in a cylinder deactivation mode in which a part of cylinders are deactivated, the vacuum degree of the deactivated cylinders is reduced and the oil consumption is reduced by introducing waste gas or air into the deactivated cylinders.
2. The engine deactivation control method of reducing engine oil consumption according to claim 1, wherein: the exhaust valve of the engine is provided with a compression release type engine braking device, the compression release type engine braking device is provided with a valve lift range which enables the exhaust valve to be opened for the second time in an intake stroke, when the engine runs in a cylinder deactivation mode in which part of cylinders stop, an ECU of the engine controls the compression release type engine braking device which stops the cylinders to be started, the exhaust valve generated by the compression release type engine braking device is opened for the second time to suck part of waste gas into the cylinders, the vacuum degree of the cylinders is reduced, and the oil consumption is reduced.
3. The engine deactivation control method of reducing engine oil consumption according to claim 1, wherein: the engine is provided with cylinder deactivation means for keeping the intake valve closed only at the intake valve, and the ECU of the engine activates the cylinder deactivation means while operating the exhaust valve in the valve lift at the time of normal ignition operation when the engine is operated in a cylinder deactivation mode in which a part of the cylinders are deactivated.
4. The engine deactivation control method of reducing engine oil consumption according to claim 1, wherein: the cylinder deactivation device of the engine is provided with a valve lift which enables an air inlet valve to be partially opened in a cylinder deactivation mode, when the engine enters the cylinder deactivation mode in which partial cylinders are stopped to operate, an ECU of the engine controls the cylinder deactivation device to be started to enable an air inlet valve of the stopped cylinder to be partially opened and enable the cylinder to suck partial air, so that the vacuum degree of the cylinder is reduced, and the oil consumption is reduced.
5. An engine, characterized in that: the engine adopts any one of the engine cylinder deactivation control methods for reducing the oil consumption.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010892991.4A CN111980811A (en) | 2020-08-25 | 2020-08-25 | Engine cylinder deactivation control method for reducing engine oil consumption |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010892991.4A CN111980811A (en) | 2020-08-25 | 2020-08-25 | Engine cylinder deactivation control method for reducing engine oil consumption |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111980811A true CN111980811A (en) | 2020-11-24 |
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| CN202010892991.4A Pending CN111980811A (en) | 2020-08-25 | 2020-08-25 | Engine cylinder deactivation control method for reducing engine oil consumption |
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Citations (11)
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|---|---|---|---|---|
| US5899828A (en) * | 1996-06-14 | 1999-05-04 | Toyota Jidosha Kabushiki Kaisha | Engine pumping loss control apparatus for locking intake or exhaust valves full open during regenerative braking hybrid vehicle |
| US6431154B1 (en) * | 1999-11-05 | 2002-08-13 | Denso Corporation | Control system for variable displacement engines |
| CN101278113A (en) * | 2005-10-12 | 2008-10-01 | 丰田自动车株式会社 | Control device and method for internal combustion engine |
| JP2011080370A (en) * | 2009-10-05 | 2011-04-21 | Daimler Ag | Control device for internal combustion engine |
| CN103189621A (en) * | 2010-10-27 | 2013-07-03 | 丰田自动车株式会社 | Control device for internal combustion engine |
| US20150176444A1 (en) * | 2013-12-19 | 2015-06-25 | Hyundai Motor Company | Control apparatus of engine having variable valve lift apparatus and a method thereof |
| JP2017180357A (en) * | 2016-03-31 | 2017-10-05 | マツダ株式会社 | Control device of multi-cylinder engine |
| CN107237698A (en) * | 2016-03-29 | 2017-10-10 | 牛刚学 | The method and device of internal combustion engine cylinder deactivation oil-break |
| US20170292460A1 (en) * | 2014-10-09 | 2017-10-12 | Toyota Jidosha Kabushiki Kaisha | Apparatus for controlling internal combustion engine |
| CN107489539A (en) * | 2016-06-09 | 2017-12-19 | 福特环球技术公司 | System and method for selecting cylinder deactivation pattern |
| US20200173378A1 (en) * | 2018-12-04 | 2020-06-04 | Toyota Jidosha Kabushiki Kaisha | Internal combustion engine system |
-
2020
- 2020-08-25 CN CN202010892991.4A patent/CN111980811A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5899828A (en) * | 1996-06-14 | 1999-05-04 | Toyota Jidosha Kabushiki Kaisha | Engine pumping loss control apparatus for locking intake or exhaust valves full open during regenerative braking hybrid vehicle |
| US6431154B1 (en) * | 1999-11-05 | 2002-08-13 | Denso Corporation | Control system for variable displacement engines |
| CN101278113A (en) * | 2005-10-12 | 2008-10-01 | 丰田自动车株式会社 | Control device and method for internal combustion engine |
| US20090120390A1 (en) * | 2005-10-12 | 2009-05-14 | Shuichi Ezaki | Control device and method for internal combustion engine |
| JP2011080370A (en) * | 2009-10-05 | 2011-04-21 | Daimler Ag | Control device for internal combustion engine |
| CN103189621A (en) * | 2010-10-27 | 2013-07-03 | 丰田自动车株式会社 | Control device for internal combustion engine |
| US20150176444A1 (en) * | 2013-12-19 | 2015-06-25 | Hyundai Motor Company | Control apparatus of engine having variable valve lift apparatus and a method thereof |
| US20170292460A1 (en) * | 2014-10-09 | 2017-10-12 | Toyota Jidosha Kabushiki Kaisha | Apparatus for controlling 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 |
| JP2017180357A (en) * | 2016-03-31 | 2017-10-05 | マツダ株式会社 | Control device of multi-cylinder engine |
| CN107489539A (en) * | 2016-06-09 | 2017-12-19 | 福特环球技术公司 | System and method for selecting cylinder deactivation pattern |
| US20200173378A1 (en) * | 2018-12-04 | 2020-06-04 | Toyota Jidosha Kabushiki Kaisha | Internal combustion engine system |
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Application publication date: 20201124 |