CN113879274A - Hybrid power control method for protecting catalyst from high-temperature aging - Google Patents
Hybrid power control method for protecting catalyst from high-temperature aging Download PDFInfo
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- CN113879274A CN113879274A CN202111152035.3A CN202111152035A CN113879274A CN 113879274 A CN113879274 A CN 113879274A CN 202111152035 A CN202111152035 A CN 202111152035A CN 113879274 A CN113879274 A CN 113879274A
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- Prior art keywords
- catalyst
- temperature
- ecu
- sends
- vcu
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- 239000003054 catalyst Substances 0.000 title claims abstract description 64
- 230000032683 aging Effects 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000010926 purge Methods 0.000 claims abstract description 5
- 239000000446 fuel Substances 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 3
- KDLHZDBZIXYQEI-UHFFFAOYSA-N palladium Substances [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000010948 rhodium Substances 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W20/00—Control systems specially adapted for hybrid vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W20/00—Control systems specially adapted for hybrid vehicles
- B60W20/50—Control strategies for responding to system failures, e.g. for fault diagnosis, failsafe operation or limp mode
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/06—Combustion engines, Gas turbines
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Hybrid Electric Vehicles (AREA)
- Exhaust Gas After Treatment (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Abstract
The invention discloses a hybrid power control method for protecting a catalyst from high-temperature aging, which comprises the following steps: the ECU sends a catalyst temperature high fault code to the VCU. The VCU sends a stop command to the ECU and simultaneously sends a drag command to the motor. When the rotating speed of the engine exceeds the preset rotating speed, the ECU controls the throttle valve to be opened to the preset maximum opening degree, so that low-temperature air is introduced to purge the catalyst, and the catalyst is cooled. Therefore, the hybrid power control method for protecting the catalyst from high-temperature aging can effectively prevent the catalyst from aging and prolong the service life of the catalyst.
Description
Technical Field
The invention relates to the technical field of internal combustion engine engineering, in particular to a hybrid power control method for protecting a catalyst from high-temperature aging.
Background
The three-way catalyst mainly contains Pt (platinum), Pd (palladium) and Rh (rhodium), is a catalyst with extremely high efficiency for purifying automobile exhaust (HC, CO and NO), and is also very expensive. If the engine is operated for a long period of time beyond the temperature range it can withstand, the catalyst may be deactivated by high temperature ageing, and the catalyst support may be damaged severely. The technical route of the prior ignition engine of the heavy-duty car is basically equivalent combustion plus a three-way catalyst or equivalent combustion plus EGR plus a three-way catalyst, the two technical engines have high exhaust temperature and have higher requirements on a control system and an execution system, if the control system has slight deviation or the ignition system is poor to cause fire catching, a large amount of incompletely combusted tail gas generates violent redox reaction in the catalyst to release a large amount of heat, and the catalyst is aged at high temperature.
When the temperature of the catalyst is overhigh or other related faults occur, the engine matched with the traditional vehicle can only protect the catalyst through measures such as speed limit, torque limit and the like of the engine, while the engine matched with the hybrid vehicle can not only protect the catalyst through ECU control, but also further reduce the temperature of the catalyst through related strategies of the whole vehicle, but the conventional hybrid vehicle has no related strategies to reduce the temperature of the catalyst.
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 hybrid power control method for protecting a catalyst from high-temperature aging, which can effectively prevent the catalyst from aging and prolong the service life of the catalyst.
To achieve the above object, the present invention provides a hybrid control method for protecting a catalyst from high-temperature aging, comprising: the ECU sends a catalyst temperature high fault code to the VCU. The VCU sends a stop command to the ECU and simultaneously sends a drag command to the motor. When the rotating speed of the engine exceeds the preset rotating speed, the ECU controls the throttle valve to be opened to the preset maximum opening degree, so that low-temperature air is introduced to purge the catalyst, and the catalyst is cooled.
In one embodiment of the present invention, the ECU issuing a catalyst temperature high fault code to the VCU includes: the exhaust temperature sensor monitors the temperature of the catalyst in real time. And when the temperature of the catalyst exceeds the exhaust temperature limit value, the exhaust temperature sensor sends an over-temperature signal to the ECU. And the ECU receives the over-temperature signal and sends a fault code of high catalyst temperature to the VCU.
In one embodiment of the present invention, the VCU sending a stop command to the ECU and simultaneously sending a drag command to the motor comprises: the VCU issues a shutdown command to the ECU, and the ECU shuts down fuel injection upon receipt of the shutdown command, thereby shutting down the engine. The VCU sends a back-and-forth dragging instruction to the motor, and the motor drags the engine according to a preset rotating speed, so that the engine runs.
Compared with the prior art, the hybrid power control method for protecting the catalyst from high-temperature aging can effectively prevent the catalyst from aging and prolong the service life of the catalyst.
Drawings
FIG. 1 is a schematic flow diagram of a hybrid control method for protecting a catalyst from high temperature aging according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a control system of a hybrid control method for protecting a catalyst from high temperature aging according to an embodiment of the present invention;
FIG. 3 is a control logic diagram of a hybrid control method for protecting a catalyst from high temperature aging according to an embodiment of the present invention.
Description of the main reference numerals:
1-VCU, 2-motor, 3-ECU, 4-exhaust temperature sensor, 5-catalyst and 6-engine.
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.
FIG. 1 is a schematic flow diagram of a hybrid control method for protecting a catalyst from high temperature aging according to an embodiment of the present invention. Fig. 2 is a schematic configuration diagram of a control system of a hybrid control method for protecting a catalyst from high-temperature aging according to an embodiment of the present invention. FIG. 3 is a control logic diagram of a hybrid control method for protecting a catalyst from high temperature aging according to an embodiment of the present invention.
As shown in fig. 1 to 3, a hybrid control method for protecting a catalyst from high-temperature aging according to a preferred embodiment of the present invention includes: s1, the ECU3 sends a catalyst 5 high temperature fault code to the VCU 1. S2, the VCU1 issues a stop command to the ECU3 and simultaneously issues a tow-down command to the motor 2. S3, when the rotating speed of the engine 6 exceeds the preset rotating speed, the ECU3 controls the throttle to be opened to the preset maximum opening degree, so that low-temperature air is introduced to purge the catalyst 5, and the temperature of the catalyst 5 is reduced.
In one embodiment of the present invention, the ECU3 issuing a catalyst 5 high temperature fault code to the VCU1 includes: the exhaust temperature sensor 4 monitors the temperature of the catalyst 5 in real time. When the temperature of the catalyst 5 exceeds an exhaust temperature limit, the exhaust temperature sensor 4 sends an over-temperature signal to the ECU 3. The ECU3 receives the over temperature signal and sends a catalyst 5 high temperature fault code to the VCU 1.
In one embodiment of the present invention, the VCU1 issuing a stop command to the ECU3 and simultaneously issuing a tow command to the motor 2 includes: the VCU1 issues a shutdown command to the ECU3, and the ECU3 deactivates fuel injection upon receiving the shutdown command, thereby shutting down the engine 6. The VCU1 sends a reverse drag command to the motor 2, and the motor 2 drags the engine 6 at a predetermined rotation speed, thereby operating the engine 6.
In practical application, the hybrid power control method for protecting the catalyst from high-temperature aging comprises the steps that signals of the exhaust temperature sensor 4 are input into an ECU3 (an electronic control unit of the engine 6), the control unit judges whether the exhaust temperature exceeds a limit value or not according to the actual temperature, the ECU3 sends an exhaust temperature exceeding fault code to a communication bus, the VCU1 (a whole vehicle electronic control unit) receives the relevant fault code, sends a stop instruction to the ECU3, and controls the motor 2 to drag the engine 6 according to a set rotating speed; meanwhile, the ECU3 stops fuel injection after receiving a stop instruction, detects the rotating speed of the engine 6, opens the throttle valve to a set large opening degree when the rotating speed of the engine 6 exceeds a set rotating speed, and introduces a large amount of fresh low-temperature air to purge the carrier of the catalytic converter 5 so as to rapidly cool the carrier, thereby achieving the effect of preventing the catalytic converter 5 from high-temperature aging.
In summary, the hybrid control method for protecting the catalyst from high temperature aging according to the present invention can effectively prevent the catalyst 5 from aging and prolong the service life of the catalyst 5.
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 (3)
1. A hybrid control method for protecting a catalyst from high temperature aging, comprising:
the ECU sends a catalyst temperature high fault code to the VCU; and
the VCU sends a stop instruction to the ECU and simultaneously sends a dragging instruction to the motor;
and when the rotating speed of the engine exceeds a preset rotating speed, the ECU controls to open the throttle valve to a preset maximum opening degree, so that low-temperature air is introduced to purge the catalyst, and the catalyst is cooled.
2. The hybrid control method of claim 1 wherein the ECU issuing a catalyst temperature high fault code to the VCU comprises:
the exhaust temperature sensor monitors the temperature of the catalyst in real time;
when the temperature of the catalyst exceeds a temperature exhaust limit value, the temperature exhaust sensor sends a temperature overhigh signal to the ECU; and
and the ECU receives the over-temperature signal and sends a fault code of high catalyst temperature to the VCU.
3. The hybrid control method of claim 1 wherein the VCU issuing a shutdown command to the ECU and concurrently issuing a tow-down command to the motor comprises:
the VCU sends a stop instruction to the ECU, and the ECU stops fuel injection after receiving the stop instruction, so that the engine stops running;
the VCU sends a back-and-forth dragging instruction to the motor, and the motor drags the engine according to a preset rotating speed, so that the engine runs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111152035.3A CN113879274A (en) | 2021-09-29 | 2021-09-29 | Hybrid power control method for protecting catalyst from high-temperature aging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111152035.3A CN113879274A (en) | 2021-09-29 | 2021-09-29 | Hybrid power control method for protecting catalyst from high-temperature aging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113879274A true CN113879274A (en) | 2022-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111152035.3A Pending CN113879274A (en) | 2021-09-29 | 2021-09-29 | Hybrid power control method for protecting catalyst from high-temperature aging |
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| Country | Link |
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| CN (1) | CN113879274A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3140050A1 (en) | 2022-09-28 | 2024-03-29 | Psa Automobiles Sa | METHOD FOR COOLING A CATALYST OF AN EXHAUST GAS LINE OF A HYBRID VEHICLE |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005194885A (en) * | 2003-12-26 | 2005-07-21 | Toyota Motor Corp | Regeneration control method for emission control device in diesel hybrid vehicle |
| JP2006233828A (en) * | 2005-02-24 | 2006-09-07 | Fujitsu Ten Ltd | Fuel injection control device |
| CN104373239A (en) * | 2013-08-12 | 2015-02-25 | 福特环球技术公司 | Methods and systems for controlling catalyst temperature |
| CN105697113A (en) * | 2016-04-20 | 2016-06-22 | 北京汽车研究总院有限公司 | Catalyst assembly and automobile |
| JP2019190315A (en) * | 2018-04-20 | 2019-10-31 | スズキ株式会社 | Fuel injection control device |
| CN111140386A (en) * | 2020-04-07 | 2020-05-12 | 潍柴动力股份有限公司 | Engine state control method and device |
| CN111980813A (en) * | 2019-05-21 | 2020-11-24 | 上海汽车集团股份有限公司 | Method and system for reducing engine emissions in a hybrid vehicle |
-
2021
- 2021-09-29 CN CN202111152035.3A patent/CN113879274A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005194885A (en) * | 2003-12-26 | 2005-07-21 | Toyota Motor Corp | Regeneration control method for emission control device in diesel hybrid vehicle |
| JP2006233828A (en) * | 2005-02-24 | 2006-09-07 | Fujitsu Ten Ltd | Fuel injection control device |
| CN104373239A (en) * | 2013-08-12 | 2015-02-25 | 福特环球技术公司 | Methods and systems for controlling catalyst temperature |
| CN105697113A (en) * | 2016-04-20 | 2016-06-22 | 北京汽车研究总院有限公司 | Catalyst assembly and automobile |
| JP2019190315A (en) * | 2018-04-20 | 2019-10-31 | スズキ株式会社 | Fuel injection control device |
| CN111980813A (en) * | 2019-05-21 | 2020-11-24 | 上海汽车集团股份有限公司 | Method and system for reducing engine emissions in a hybrid vehicle |
| CN111140386A (en) * | 2020-04-07 | 2020-05-12 | 潍柴动力股份有限公司 | Engine state control method and device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| FR3140050A1 (en) | 2022-09-28 | 2024-03-29 | Psa Automobiles Sa | METHOD FOR COOLING A CATALYST OF AN EXHAUST GAS LINE OF A HYBRID VEHICLE |
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Application publication date: 20220104 |