CN111907338A - Four-gear shifting control method for electric automobile - Google Patents
Four-gear shifting control method for electric automobile Download PDFInfo
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- CN111907338A CN111907338A CN202010302341.XA CN202010302341A CN111907338A CN 111907338 A CN111907338 A CN 111907338A CN 202010302341 A CN202010302341 A CN 202010302341A CN 111907338 A CN111907338 A CN 111907338A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
- B60L15/2045—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed for optimising the use of energy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/42—Drive Train control parameters related to electric machines
- B60L2240/421—Speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/42—Drive Train control parameters related to electric machines
- B60L2240/423—Torque
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2260/00—Operating Modes
- B60L2260/20—Drive modes; Transition between modes
- B60L2260/26—Transition between different drive modes
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- 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
- Y02T10/72—Electric energy management in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
According to the four-gear shifting control method of the electric vehicle, four gears are a reverse gear R, a neutral gear N, an economic forward gear D and a moving forward gear S respectively, a vehicle controller receives gear signals, confirms a shifting operation according to the current working condition, sets the economic forward gear D and the moving forward gear S, and controls different vehicle speed limit values, torque intervals and energy recovery intensity corresponding to the power of the vehicle. When the vehicle is in an economic forward gear, the vehicle speed and the torque interval are limited reasonably, the energy recovery intensity is increased, the energy consumption caused by rapid acceleration or overlarge speed change can be reduced, and the efficient braking energy recovery is realized. When the forward gear is moved, the torque interval limit is released, the speed limit range is increased, and the driving pleasure and the vehicle maneuverability are improved.
Description
The technical field is as follows:
the invention relates to a four-gear shifting control method for an electric automobile, and belongs to the technical field of power control systems of electric automobile vehicles.
Background art:
the conventional electric automobile gear shifter has single gear, only one forward gear, single driving style and single vehicle power control mode, and cannot meet the diversified driving styles and modes of a driver.
Therefore, there is a need to improve the prior art to overcome the deficiencies of the prior art.
The invention content is as follows:
the invention provides a four-gear shift control method for an electric vehicle, which aims to solve the problems in the prior art, and the four-gear shift control method for the electric vehicle can reduce the energy loss of the vehicle and increase the energy recovery of the vehicle by arranging an economic forward gear and a moving forward gear, can provide a new driving style and a new driving mode for a driver, and meets diversified requirements.
The technical scheme adopted by the invention is as follows: a four-gear shifting control method for an electric vehicle comprises the following steps:
the method comprises the following steps: the brake pedal is stepped down, the knob is rotated to the R gear position of the reverse gear, and the reverse gear is judged to be effective when the vehicle stops or the forward moving speed is less than 1 km/h;
loosening an accelerator pedal and rotating a knob to a reverse gear R position, and judging that the reverse gear is effective when the backward moving speed is more than 1 km/h;
step two: rotating the knob to a neutral N gear position, and when the gear is switched to a gear forbidden by the current vehicle running state, judging that the system is in the neutral gear, wherein the vehicle is in a free sliding state when the system is in the neutral gear;
step three: stepping on a brake pedal and rotating a knob to an economic forward gear D gear position, and judging that the forward gear is effective when the vehicle stops or the backward moving speed is less than 1 km/h;
loosening an accelerator pedal and rotating a knob to the position of an economic forward gear D, judging that the forward gear is effective when the forward moving speed is more than 1km/h, and rotating the knob to the position of the economic forward gear D when the motion gear forward gear S is effective to judge that the forward gear is effective;
step four: stepping on a brake pedal and rotating a knob to a position of an S gear of a forward gear of the motion gear, and judging that the motion gear is effective when the vehicle stops or the backward moving speed is less than 1 km/h;
loosening an accelerator pedal and rotating a knob to a forward gear S position of the motion gear, and judging that the motion gear is effective when the forward moving speed is more than 1 km/h;
when the economic forward gear D gear is effective, the knob is screwed to the position of the motion gear forward gear S gear, and the motion gear is judged to be effective.
Further, the maximum vehicle speed of the D gear of the economical forward gear is 80 km/h.
Further, the highest vehicle speed of the S gear of the moving gear and the forward gear is 100 km/h.
The invention has the following beneficial effects: according to the four-gear shifting control method of the electric vehicle, four gears are a reverse gear R, a neutral gear N, an economic forward gear D and a moving forward gear S respectively, a vehicle controller receives gear signals, confirms a shifting operation according to the current working condition, sets the economic forward gear D and the moving forward gear S, and controls different vehicle speed limit values, torque intervals and energy recovery intensity corresponding to the power of the vehicle. When the vehicle is in an economic forward gear, the vehicle speed and the torque interval are limited reasonably, the energy recovery intensity is increased, the energy consumption caused by rapid acceleration or overlarge speed change can be reduced, and the efficient braking energy recovery is realized. When the forward gear is moved, the torque interval limit is released, the speed limit range is increased, and the driving pleasure and the vehicle maneuverability are improved.
Description of the drawings:
fig. 1 is a schematic diagram of an S-range power curve, an S-range torque curve, a D-range power curve, and a D-range torque curve.
Fig. 2 is a peak comparison plot of power range torque and economy range torque.
The specific implementation mode is as follows:
the invention will be further described with reference to the accompanying drawings.
The invention discloses a four-gear shifting control method for an electric vehicle, which comprises the following steps:
the method comprises the following steps: the brake pedal is stepped down, the knob is rotated to the R gear position of the reverse gear, and the reverse gear is judged to be effective when the vehicle stops or the forward moving speed is less than 1 km/h;
and (4) loosening the accelerator pedal and rotating the knob to the position of the reverse gear R gear, and judging that the reverse gear is effective only when the backward moving speed is more than 1 km/h.
Step two: and rotating the knob to a neutral N gear position, and if switching to a gear prohibited by the current vehicle driving state is attempted, judging that the system is in the neutral gear, wherein the vehicle is in a free-sliding state in the neutral gear.
Step three: stepping on a brake pedal and rotating a knob to a D gear position, and only judging that a forward gear is effective when a vehicle stops or the backward moving speed is less than 1 km/h;
and loosening the accelerator pedal and rotating the knob to the position of the economic forward gear D gear, judging that the forward gear is effective only when the forward moving speed is more than 1km/h, and rotating the knob to the position of the economic forward gear D gear when the S gear is effective to judge that the forward gear is effective.
Step four: the brake pedal is stepped on and the knob is rotated to the S-gear position of the forward gear of the motion gear. Only when the vehicle stops or the backward moving speed is less than 1km/h, the moving gear is determined to be effective;
loosening an accelerator pedal and rotating a knob to the position of a forward gear S of the motion gear, and judging that the motion gear is effective only when the forward moving speed is more than 1 km/h;
when the economic forward gear D gear is effective, the knob is screwed to the position of the motion gear forward gear S gear, and the motion gear is judged to be effective.
Wherein:
d, gear shifting: and (4) the economical forward gear, the maximum vehicle speed is 80km/h, and the acceleration performance of the limited driving power (the maximum power is 45kw) is weakened.
S gear: the gear is moved forward, the maximum speed is 100km/h, the driving power is not limited, and the maximum torque is not limited.
Operating the motor in the economy mode improves efficiency by about 3% compared to the sport mode.
The coasting energy recovery torque during the D gear is 1.2 times that of the S gear.
And the driving braking energy recovery torque under the D gear is 1.4 times that of the S gear.
According to the four-gear shifting control method of the electric vehicle, four gears are a reverse gear R, a neutral gear N, an economic forward gear D and a moving forward gear S respectively, a vehicle controller receives gear signals, confirms a shifting operation according to the current working condition, sets the economic forward gear D and the moving forward gear S, and controls different vehicle speed limit values, torque intervals and energy recovery intensity corresponding to the power of the vehicle. When the vehicle is in an economic forward gear, the vehicle speed and the torque interval are limited reasonably, the energy recovery intensity is increased, the energy consumption caused by rapid acceleration or overlarge speed change can be reduced, and the efficient braking energy recovery is realized. When the forward gear is moved, the torque interval limit is released, the speed limit range is increased, and the driving pleasure and the vehicle maneuverability are improved.
The foregoing is only a preferred embodiment of this invention and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the invention and these modifications should also be considered as the protection scope of the invention.
Claims (3)
1. A four-gear shifting control method of an electric vehicle is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the following steps: the brake pedal is stepped down, the knob is rotated to the R gear position of the reverse gear, and the reverse gear is judged to be effective when the vehicle stops or the forward moving speed is less than 1 km/h;
loosening an accelerator pedal and rotating a knob to a reverse gear R position, and judging that the reverse gear is effective when the backward moving speed is more than 1 km/h;
step two: rotating the knob to a neutral N gear position, and when the gear is switched to a gear forbidden by the current vehicle running state, judging that the system is in the neutral gear, wherein the vehicle is in a free sliding state when the system is in the neutral gear;
step three: stepping on a brake pedal and rotating a knob to an economic forward gear D gear position, and judging that the forward gear is effective when the vehicle stops or the backward moving speed is less than 1 km/h;
loosening an accelerator pedal and rotating a knob to the position of an economic forward gear D, judging that the forward gear is effective when the forward moving speed is more than 1km/h, and rotating the knob to the position of the economic forward gear D when the motion gear forward gear S is effective to judge that the forward gear is effective;
step four: stepping on a brake pedal and rotating a knob to a position of an S gear of a forward gear of the motion gear, and judging that the motion gear is effective when the vehicle stops or the backward moving speed is less than 1 km/h;
loosening an accelerator pedal and rotating a knob to a forward gear S position of the motion gear, and judging that the motion gear is effective when the forward moving speed is more than 1 km/h;
when the economic forward gear D gear is effective, the knob is screwed to the position of the motion gear forward gear S gear, and the motion gear is judged to be effective.
2. The four-gear shifting control method of the electric vehicle as claimed in claim 1, characterized in that: and the maximum speed of the D gear of the economical forward gear is 80 km/h.
3. The four-gear shifting control method of the electric vehicle according to claim 2, characterized in that: the highest speed of the S gear of the forward gear of the moving gear is 100 km/h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010302341.XA CN111907338A (en) | 2020-04-16 | 2020-04-16 | Four-gear shifting control method for electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010302341.XA CN111907338A (en) | 2020-04-16 | 2020-04-16 | Four-gear shifting control method for electric automobile |
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| Publication Number | Publication Date |
|---|---|
| CN111907338A true CN111907338A (en) | 2020-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010302341.XA Pending CN111907338A (en) | 2020-04-16 | 2020-04-16 | Four-gear shifting control method for electric automobile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112721653A (en) * | 2021-01-08 | 2021-04-30 | 东风华神汽车有限公司 | Method and device for controlling motion mode of direct drive motor of pure electric vehicle |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000245016A (en) * | 1999-02-18 | 2000-09-08 | Toyota Motor Corp | Electric vehicle and control thereof |
| JP2007040254A (en) * | 2005-08-05 | 2007-02-15 | Fujitsu Ten Ltd | Economical running control system and its device, and shift control device |
| CN103359116A (en) * | 2013-07-29 | 2013-10-23 | 重庆长安汽车股份有限公司 | Method and system for controlling dynamic gear and economical gear of pure electric automobile |
| CN107253481A (en) * | 2017-05-27 | 2017-10-17 | 北京新能源汽车股份有限公司 | Electronic gear shifting processing method and device and automobile |
| CN110126604A (en) * | 2018-02-08 | 2019-08-16 | 郑州宇通客车股份有限公司 | Pure electric vehicle motor driven systems and electric vehicle |
-
2020
- 2020-04-16 CN CN202010302341.XA patent/CN111907338A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000245016A (en) * | 1999-02-18 | 2000-09-08 | Toyota Motor Corp | Electric vehicle and control thereof |
| JP2007040254A (en) * | 2005-08-05 | 2007-02-15 | Fujitsu Ten Ltd | Economical running control system and its device, and shift control device |
| CN103359116A (en) * | 2013-07-29 | 2013-10-23 | 重庆长安汽车股份有限公司 | Method and system for controlling dynamic gear and economical gear of pure electric automobile |
| CN107253481A (en) * | 2017-05-27 | 2017-10-17 | 北京新能源汽车股份有限公司 | Electronic gear shifting processing method and device and automobile |
| CN110126604A (en) * | 2018-02-08 | 2019-08-16 | 郑州宇通客车股份有限公司 | Pure electric vehicle motor driven systems and electric vehicle |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112721653A (en) * | 2021-01-08 | 2021-04-30 | 东风华神汽车有限公司 | Method and device for controlling motion mode of direct drive motor of pure electric vehicle |
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