CN112627994A - Method for realizing speed reduction and speed regulation of engine by utilizing active short circuit - Google Patents
Method for realizing speed reduction and speed regulation of engine by utilizing active short circuit Download PDFInfo
- Publication number
- CN112627994A CN112627994A CN202011520552.7A CN202011520552A CN112627994A CN 112627994 A CN112627994 A CN 112627994A CN 202011520552 A CN202011520552 A CN 202011520552A CN 112627994 A CN112627994 A CN 112627994A
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- speed
- active short
- engine
- motor
- transmission
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000005540 biological transmission Effects 0.000 claims abstract description 22
- 230000007935 neutral effect Effects 0.000 claims abstract description 5
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 238000010586 diagram Methods 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
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Classifications
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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
- F02D31/00—Use of speed-sensing governors to control combustion engines, not otherwise provided for
- F02D31/001—Electric control of rotation speed
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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
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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
- F02D45/00—Electrical control not provided for in groups F02D41/00 - F02D43/00
-
- 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
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/06—Combustion engines, Gas turbines
- B60W2710/0644—Engine speed
Abstract
The invention provides a method for realizing the speed reduction and speed regulation of an engine by utilizing an active short circuit, which shortens the gear-up and speed-down time of the engine and shortens the power interruption time under the condition that a main relay of a battery is disconnected due to a fault. After the speed regulation is started, the transmission is in neutral, if the current working condition is normal, the motor normally regulates the speed, and after the target rotating speed is reached, the transmission is in m2 gear to complete gear shifting; if the S + and the S-are disconnected and the motor controller has no fault, the motor controller enters an active short-circuit state, the speed of the engine is accelerated through negative torque, the active short-circuit state is exited after the target rotating speed is reached, the transmission is shifted to the gear m2, and gear shifting is completed; otherwise, the speed is adjusted through the engine, and after the target rotating speed is reached, the transmission is shifted by m2, and the gear shifting is completed.
Description
Technical Field
The invention relates to the technical field of engine speed regulation, in particular to a method for realizing speed reduction and speed regulation of an engine by utilizing an active short circuit.
Background
A parallel hybrid powertrain is schematically illustrated in fig. 1. The power of the engine is input into an input shaft of the motor through the clutch, and is input into the transmission after being coupled with the power of the motor, and the transmission transmits the power to the main speed reducer through the transmission shaft and then to the wheels.
As shown in fig. 2, assuming that the current rotation speed is n1, and the transmission shifts from the m1 gear (speed ratio k1) to the m2 gear (speed ratio k2), the target rotation speed corresponding to the m2 gear is n2 ═ n1 × k2/k 1. In the gear shifting process, the transmission is firstly shifted from the gear m1 to the neutral gear, the motor is used for adjusting the engine speed to n2, the transmission is shifted into the gear m2, and the gear shifting is completed. t1 to t2 are shift times.
Fig. 3 is a schematic diagram of the electronic control system. Under the normal working condition, main relays S + and S-in the battery are closed, and positive torque or negative torque can be realized through the motor by controlling S1-S6, so that the speed of the engine is regulated and controlled. If S + and S-are disconnected due to faults, the motor torque cannot be normally controlled, and the engine cannot realize negative torque, so that the gear-up and speed-down speed regulation process is slow, and the power interruption time is long.
Disclosure of Invention
In view of the above problems, the present invention provides a method for realizing the speed reduction and speed regulation of an engine by using an active short circuit, which shortens the up-shift and down-speed time and shortens the power interruption time of the engine under the condition that a main relay of a battery is disconnected due to a fault.
A method for realizing speed reduction and speed regulation of an engine by utilizing active short circuit is characterized by comprising the following steps: after the speed regulation is started, the transmission is in neutral, if the current working condition is normal, the motor normally regulates the speed, and after the target rotating speed is reached, the transmission is in m2 gear to complete gear shifting; if the S + and the S-are disconnected and the motor controller has no fault, the motor controller enters an active short-circuit state, the speed of the engine is accelerated through negative torque, the active short-circuit state is exited after the target rotating speed is reached, the transmission is shifted to the gear m2, and gear shifting is completed; otherwise, the speed is adjusted through the engine, and after the target rotating speed is reached, the transmission is shifted by m2, and the gear shifting is completed.
It is further characterized in that: in the active short-circuit state, S +, S-, S2, S4 and S6 are disconnected and S1, S3 and S5 are closed at the same time, so that three-phase active short-circuit of the motor is realized, negative torque is generated in the motor, and the negative torque is used for reducing the speed and regulating the speed of the motor;
in the active short-circuit state, S +, S-, S1, S3 and S5 are disconnected and S2, S4 and S6 are closed at the same time, so that three-phase active short-circuit of the motor is realized, negative torque is generated in the motor, and the negative torque is used for reducing the speed and regulating the speed of the motor;
the negative torque in the active short-circuit state is determined by the motor characteristics and the current rotation speed.
After the invention is adopted, a negative torque is realized by three-phase active short circuit of the motor controller, and the rotating speed of the motor is regulated. The method is suitable for the abnormal operation working condition that the main relay is disconnected after the battery of the hybrid power system fails; under the condition that a main relay of a battery is disconnected, the speed of an engine is reduced and regulated by utilizing negative torque realized by three-phase active short circuit of a motor, so that the speed regulation time can be shortened, and the gear shifting is accelerated; the condition that the main relay of the battery is disconnected due to faults is caused, the gear-up and speed-down time of the engine is shortened, and the power interruption time is short.
Drawings
FIG. 1 is a schematic diagram of a prior art parallel hybrid powertrain system;
FIG. 2 is a schematic diagram of engine speed regulation;
FIG. 3 is a schematic diagram of an electronic control system;
FIG. 4 is a flow chart of engine speed control.
Detailed Description
A method for realizing the speed reduction and speed regulation of an engine by using an active short circuit is shown in figures 3 and 4: after the speed regulation is started, the transmission is in neutral, if the current working condition is normal, the motor normally regulates the speed, and after the target rotating speed is reached, the transmission is in m2 gear to complete gear shifting; if the S + and the S-are disconnected and the motor controller has no fault, the motor controller enters an active short-circuit state, the speed of the engine is accelerated through negative torque, the active short-circuit state is exited after the target rotating speed is reached, the transmission is shifted to the gear m2, and gear shifting is completed; otherwise, the speed is adjusted through the engine, and after the target rotating speed is reached, the transmission is shifted by m2, and the gear shifting is completed.
In the active short-circuit state, S +, S-, S2, S4 and S6 are disconnected and S1, S3 and S5 are closed at the same time, so that three-phase active short-circuit of the motor is realized, negative torque is generated in the motor, and the negative torque is used for reducing the speed and regulating the speed of the motor;
in the active short-circuit state, S +, S-, S1, S3 and S5 are disconnected and S2, S4 and S6 are closed at the same time, so that three-phase active short-circuit of the motor is realized, negative torque is generated in the motor, and the negative torque is used for reducing the speed and regulating the speed of the motor;
the negative torque in the active short-circuit state is determined by the motor characteristics and the current rotation speed.
The three-phase active short circuit of the motor controller is utilized to realize a negative torque, and the rotating speed of the motor is adjusted. The method is suitable for the abnormal operation working condition that the main relay is disconnected after the battery of the hybrid power system fails; under the condition that a main relay of a battery is disconnected, the speed of an engine is reduced and regulated by utilizing negative torque realized by three-phase active short circuit of a motor, so that the speed regulation time can be shortened, and the gear shifting is accelerated; the condition that the main relay of the battery is disconnected due to faults is caused, the gear-up and speed-down time of the engine is shortened, and the power interruption time is short.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (4)
1. A method for realizing speed reduction and speed regulation of an engine by utilizing active short circuit is characterized by comprising the following steps: after the speed regulation is started, the transmission is in neutral, if the current working condition is normal, the motor normally regulates the speed, and after the target rotating speed is reached, the transmission is in m2 gear to complete gear shifting; if the S + and the S-are disconnected and the motor controller has no fault, the motor controller enters an active short-circuit state, the speed of the engine is accelerated through negative torque, the active short-circuit state is exited after the target rotating speed is reached, the transmission is shifted to the gear m2, and gear shifting is completed; otherwise, the speed is adjusted through the engine, and after the target rotating speed is reached, the transmission is shifted by m2, and the gear shifting is completed.
2. The method for realizing the speed reduction and speed regulation of the engine by utilizing the active short circuit as claimed in claim 1, wherein the method comprises the following steps: and in the active short-circuit state, the S +, S-, S2, S4 and S6 are disconnected and the S1, S3 and S5 are closed at the same time, so that the three-phase active short-circuit of the motor is realized, and negative torque is generated in the motor and is used for reducing the speed and regulating the speed of the motor.
3. The method for realizing the speed reduction and speed regulation of the engine by utilizing the active short circuit as claimed in claim 1, wherein the method comprises the following steps: and in the active short-circuit state, the S +, S-, S1, S3 and S5 are disconnected and the S2, S4 and S6 are closed at the same time, so that the three-phase active short-circuit of the motor is realized, and negative torque is generated in the motor and is used for reducing the speed and regulating the speed of the motor.
4. A method for achieving engine speed reduction and speed regulation by means of active short-circuiting according to claim 2 or 3, wherein: the negative torque in the active short-circuit state is determined by the motor characteristics and the current rotation speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011520552.7A CN112627994A (en) | 2020-12-21 | 2020-12-21 | Method for realizing speed reduction and speed regulation of engine by utilizing active short circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011520552.7A CN112627994A (en) | 2020-12-21 | 2020-12-21 | Method for realizing speed reduction and speed regulation of engine by utilizing active short circuit |
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| CN112627994A true CN112627994A (en) | 2021-04-09 |
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| CN202011520552.7A Pending CN112627994A (en) | 2020-12-21 | 2020-12-21 | Method for realizing speed reduction and speed regulation of engine by utilizing active short circuit |
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Citations (7)
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| CN109406997A (en) * | 2018-11-30 | 2019-03-01 | 北京新能源汽车股份有限公司 | The test method and device and storage medium of motor active short-circuit relay |
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-
2020
- 2020-12-21 CN CN202011520552.7A patent/CN112627994A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100200318A1 (en) * | 2007-08-16 | 2010-08-12 | Zf Friedrichshafen Ag | Method for carrying out a tractive-force interrupted shifting in a parallel hybrid vehicle |
| EP2433830A1 (en) * | 2010-09-28 | 2012-03-28 | Brusa Elektronik AG | Method and control for providing electrical energy from a driven alternating current synchronous machine |
| CN107112937A (en) * | 2014-11-14 | 2017-08-29 | 爱信艾达株式会社 | Control device for inverter and vehicle console device |
| WO2017186436A1 (en) * | 2016-04-27 | 2017-11-02 | Zf Friedrichshafen Ag | System for actively short-circuiting phases of an inverter and motor vehicle drive |
| CN107976627A (en) * | 2016-10-21 | 2018-05-01 | 宝沃汽车（中国）有限公司 | Method for diagnosing faults, system and the vehicle of motor driven systems |
| CN109406997A (en) * | 2018-11-30 | 2019-03-01 | 北京新能源汽车股份有限公司 | The test method and device and storage medium of motor active short-circuit relay |
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Non-Patent Citations (1)
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Application publication date: 20210409 |
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