CN108533740A - A kind of control device and method improving the impact of vehicle sliding downshift - Google Patents
A kind of control device and method improving the impact of vehicle sliding downshift Download PDFInfo
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- CN108533740A CN108533740A CN201810380677.0A CN201810380677A CN108533740A CN 108533740 A CN108533740 A CN 108533740A CN 201810380677 A CN201810380677 A CN 201810380677A CN 108533740 A CN108533740 A CN 108533740A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/04—Smoothing ratio shift
- F16H61/06—Smoothing ratio shift by controlling rate of change of fluid pressure
- F16H61/061—Smoothing ratio shift by controlling rate of change of fluid pressure using electric control means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/04—Smoothing ratio shift
- F16H61/06—Smoothing ratio shift by controlling rate of change of fluid pressure
- F16H61/061—Smoothing ratio shift by controlling rate of change of fluid pressure using electric control means
- F16H2061/062—Smoothing ratio shift by controlling rate of change of fluid pressure using electric control means for controlling filling of clutches or brake servos, e.g. fill time, fill level or pressure during filling
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
Abstract
The present invention provides a kind of control device and methods of improvement vehicle sliding downshift impact, belong to vehicle shift technical field.It solves the problems, such as shift shock during downshift of traditional AT vehicles in low speed slide.The control device and method of this improvement vehicle sliding downshift impact, real-time rotating speed including TCU, for acquiring engine is simultaneously sent to the first collector of TCU and the real-time rotating speed for acquiring turbine and the second collector for being sent to TCU, TCU carries out clutch to be segmented oil-filled control, first stage is oil-filled so that real-time turbine rotating speed rises to the preset difference value and is less than real time engine rotating speed, second stage is oil-filled so that secondary speed rises to target turbine rotating speed, and the oil-filled oil-filled rate of second stage is less than first stage oil-filled oil-filled rate.The structure makes the process that secondary speed passes through real time engine rotating speed become more gentle and soft, substantially improves the shift shock of automatic transmission internal gear, ensures that vehicle is completed in a relatively short time downshift.
Description
Technical field
The invention belongs to vehicle shift technical field, especially a kind of control device improving the impact of vehicle sliding downshift and
Method.
Background technology
Automatic transmission is a kind of gear drive being applied in vehicle, due to the presence of gear clearance so that vehicle
Gear engagement direction transformation can be caused in the case where sliding downshift operating mode, then led to more serious shift shock, influenced to drive
Comfort.And the requirement with driver to driver comfort is higher and higher, vehicle shift impact causes driver comfort huge
Big influence, even the shift shock that the frequency is not high, the complaint that can also incur driver is even complained, and driver is seriously affected
Driving sensation operating mode.
Currently, the vehicle of tradition AT, during sliding, engine speed is less than secondary speed, with the drop of speed
Low, the rotating speed of turbine can also decrease, and general vehicle has under the operating mode makes vehicle exist there are one smaller accelerator open degree
Certain drive speed is kept in taxiing procedures, and then the case where engine speed is slightly above secondary speed occurs, at this time automatically
As shown in Figure of description 1, which will not hit the occluding relation of gear and gear in gearbox with gear
It hits；If vehicle carries out downshift at this moment, due to speed ratio variation etc., secondary speed can be caused to increase and turn more than engine
Speed, when secondary speed is more than engine speed, the occluding relation such as Figure of description 2 of gear and gear in automatic gear-box
It is shown, when secondary speed passes through engine speed with larger slope, have between the gear and gear in automatic transmission
Strong shift shock seriously affects the comfort of driving, also causes that gear wear is serious, reduces the service life of gear.
For the above technical problems, Chinese patent net discloses a kind of control device (publication number of torque-converters：
CN101608689A), which includes engine, automatic transmission, the torque-converters with lock-up clutch, transport condition judgement
Device, gear-shift command decision maker, first object sliding device for calculating, the first engine speed change rate limits value calculate dress
It sets, the second target slip amount computing device and control device, in the case where automatic transmission is in speed change, first object is slided
It moves device for calculating and calculates first object slippage, the first engine speed change rate limits value calculation apparatus according to vehicle
Operating condition calculates the first engine speed change rate limits value, and the second target slip amount computing device is according to the first engine
Relative speed variation limits value calculates the second target slip amount, when the gear stage being changed to rudimentary side under sliding state,
Second target slip amount is set as to the final goal slippage of lock-up clutch.Under sliding state when downshift, the device is logical
The size of the second target slip amount of control is crossed to control the connection dynamics of lock-up clutch so that input element and output element are
Semi join state, which generates the sliding lockup state of sliding between input element and output element, though the control mode
Shift shock caused by so engine speed capable of being inhibited drastically to decline, but can not be applied to caused by transmission gear down-shift,
Secondary speed is changed to above engine speed, caused shift shock by being less than engine speed.
Invention content
The purpose of the present invention is there is the above problem in view of the prior art, it is proposed that a kind of improvement vehicle sliding downshift punching
The control device hit, the technical problem to be solved by the present invention is to：How the vehicle of traditional AT speed changer is reduced in taxiing procedures
In downshift impact.
Object of the invention can be realized by the following technical scheme：A kind of control dress improving the impact of vehicle sliding downshift
It sets, including TCU, the real-time rotating speed for acquiring engine and is sent to the first collector of TCU and the reality for acquiring turbine
When rotating speed and be sent to the second collector of TCU, which is characterized in that the TCU writes down at this time real-time according to downshift signal post
Secondary speed and real time engine rotating speed, and calculate according to real-time turbine rotating speed the target turbine rotating speed after the completion of downshift；It will
Real-time turbine rotating speed and target turbine rotating speed are compared with real time engine rotating speed respectively, if real time engine rotating speed is more than in fact
When secondary speed and less than target turbine rotating speed when, TCU is oil-filled to clutch to carry out being segmented oil-filled control；TCU stores real-time whirlpool
Preset difference value between wheel speed and real time engine rotating speed rises to the preset difference value and less than real-time in real-time turbine rotating speed
When engine speed, first stage oil-filled end enters that second stage is oil-filled immediately, it is oil-filled in the first stage after whirlpool
When wheel speed rises to target turbine rotating speed, the oil-filled end of second stage, and the oil-filled oil-filled rate of second stage is less than first
Stage oil-filled oil-filled rate.
In the control device of improvement vehicle sliding downshift impact, due to only in real-time turbine rotating speed with larger slope
When passing through engine speed and reaching target turbine rotating speed, automatic transmission internal gear just will appear more strong shift shock,
The target gear of automatic transmission by TCU compares real-time turbine rotating speed, real time engine rotating speed and target whirlpool after changing
Magnitude relationship between wheel speed three is to determine whether will appear shift shock, after confirmation will appear shift shock, TCU to from
Clutch carries out the oil-filled control of two-part；Therefore, oil-filled in the first stage so that secondary speed is sent out with faster speed near real-time
Motivation rotating speed, second stage is oil-filled so that secondary speed is gradually synchronous with real time engine rotating speed with more slow speed, directly
Downshift is just completed to after reaching target turbine rotating speed, in second stage Oil feeding process, the variation of secondary speed is more slow, makes
Secondary speed passes through the process of real time engine rotating speed and becomes more gentle and soft, substantially improve automatic transmission internal tooth
The shift shock of wheel, and the rate that first stage oil-filled rate is very fast and second stage is oil-filled is oil-filled compared with the two-part constituted slowly
Mode takes into account the downshift time while improving shift shock, ensures that vehicle is completed in a relatively short time downshift, downshift is rung
It should be in time and comfortable.
In the control device that a kind of above-mentioned improvement vehicle sliding downshift is impacted, the preset difference value is 100rpm.
Under the preset difference value, during TCU carries out the oil-filled control of second stage to clutch, on the one hand to secondary speed and in real time
Engine speed has simultaneously provided buffer time, is conducive to secondary speed and gently passes through real time engine rotating speed；On the other hand,
Raising secondary speeds more as possible, is conducive to shorten drop during making TCU to clutch progress first stage oil-filled control
Keep off the time.
In the control device that a kind of above-mentioned improvement vehicle sliding downshift is impacted, the first stage oil-filled oil-filled
Ratio between rate and the oil-filled oil-filled rate of second stage is 1.2.Under the ratio, it is oil-filled to substantially reduce the first stage
Time, to the second stage oil-filled reserved time it is more, ensure second stage it is oil-filled during secondary speed pass through in real time
The process of engine speed becomes more gentle and soft, and ensureing can be in a relatively short period of time while reducing shift shock
Complete downshift.
In the control device that a kind of above-mentioned improvement vehicle sliding downshift is impacted, when the real-time turbine rotating speed and target
When secondary speed is respectively less than real time engine rotating speed, clutch is not carried out to be segmented oil-filled control.The real-time turbine rotating speed, in real time
Engine speed and the magnitude relationship of target turbine rotating speed show that vehicle is not in shift shock during downshift, therefore
TCU to the oil-filled control of clutch be directly it is primary it is oil-filled in place.
In the control device that a kind of above-mentioned improvement vehicle sliding downshift is impacted, when the real-time turbine rotating speed and target
When secondary speed is all higher than real time engine rotating speed, clutch is not carried out to be segmented oil-filled control.The real-time turbine rotating speed, in real time
Engine speed and the magnitude relationship of target turbine rotating speed show that vehicle is not in shift shock during downshift, therefore
TCU to the oil-filled control of clutch be directly it is primary it is oil-filled in place.
A kind of control method improving the impact of vehicle sliding downshift, which is characterized in that include the following steps：
Step 1：The real-time rotating speed of engine is acquired by the first collector and is sent to TCU and by the second collector
It acquires the real-time rotating speed of turbine and is sent to TCU；
Step 2：TCU writes down real-time turbine rotating speed and real time engine rotating speed at this time according to downshift signal post, and according to
Real-time turbine rotating speed calculates the target turbine rotating speed after the completion of downshift；
Step 3：TCU compares real-time turbine rotating speed and target turbine rotating speed with real time engine rotating speed respectively, if
When real time engine rotating speed is more than real-time turbine rotating speed and is less than target turbine rotating speed, TCU carries out clutch to be segmented oil-filled control
System；
Step 4：TCU stores the preset difference value between real-time turbine rotating speed and real time engine rotating speed, turns in real-time turbine
When speed rises to the preset difference value and is less than real time engine rotating speed, first stage oil-filled end enters second stage immediately
It is oil-filled, it is oil-filled in the first stage after secondary speed when rising to target turbine rotating speed, the oil-filled end of second stage, and
Two-stage oil-filled oil-filled rate is less than first stage oil-filled oil-filled rate.
In the control method that a kind of above-mentioned improvement vehicle sliding downshift is impacted, the preset difference value in the step 4 is
100rpm。
In the control method that a kind of above-mentioned improvement vehicle sliding downshift is impacted, the first stage in the step 4 fills
Ratio between the oil-filled oil-filled rate of oily oil-filled rate and second stage is 1.2.
In the control method that a kind of above-mentioned improvement vehicle sliding downshift is impacted, when real-time turbine turns in the step 3
When speed and target turbine rotating speed are respectively less than real time engine rotating speed, clutch is not carried out to be segmented oil-filled control.
In the control method that a kind of above-mentioned improvement vehicle sliding downshift is impacted, when real-time turbine turns in the step 3
When speed and target turbine rotating speed are all higher than real time engine rotating speed, clutch is not carried out to be segmented oil-filled control.
Compared with prior art, the control device and method for improving the impact of vehicle sliding downshift of the invention has following excellent
Point：The process that secondary speed passes through real time engine rotating speed becomes more gentle and soft, substantially improves in automatic transmission
The shift shock of gear, and the two-part that the rate that first stage oil-filled rate is very fast and second stage is oil-filled is constituted more slowly fills
Oily mode takes into account the downshift time while improving shift shock, ensures that vehicle is completed in a relatively short time downshift, downshift
Response is in time and comfortable.
Description of the drawings
Fig. 1 be prior art vehicle under sliding state secondary speed be less than engine speed when automatic transmission in
Engaged gears structure principle chart.
Fig. 2 is fluid drive when prior art vehicle secondary speed after downshift under sliding state is higher than engine speed
Engaged gears structure principle chart in device.
Fig. 3 is secondary speed of the vehicle of the present invention before and after downshift under sliding state and engine speed relationship figure.
Fig. 4 is that the clutch of the present invention is segmented the oil-filled secondary speed with vehicle before and after downshift under sliding state and starts
Machine rotation speed relation comparison diagram.
Fig. 5 is the principle flow chart of vehicle of the present invention downshift under sliding state.
Specific implementation mode
Following is a specific embodiment of the present invention in conjunction with the accompanying drawings, technical scheme of the present invention will be further described,
However, the present invention is not limited to these examples.
Embodiment 1
The control device of this improvement vehicle sliding downshift impact, including it is TCU, concurrent for acquiring the real-time rotating speed of engine
Give the first collector of TCU and the real-time rotating speed for acquiring turbine and the second collector for being sent to TCU, the TCU roots
Real-time turbine rotating speed and real time engine rotating speed at this time are write down according to downshift signal post, and drop is calculated according to real-time turbine rotating speed
Target turbine rotating speed after the completion of gear；Real-time turbine rotating speed and target turbine rotating speed are carried out with real time engine rotating speed respectively pair
Than if real time engine rotating speed is more than real-time turbine rotating speed and is less than target turbine rotating speed, TCU is oil-filled to clutch to be divided
The oil-filled control of section, when the real-time turbine rotating speed and target turbine rotating speed are respectively less than real time engine rotating speed or the real-time whirlpool
When wheel speed and target turbine rotating speed are all higher than real time engine rotating speed, clutch is not carried out to be segmented oil-filled control；TCU is stored
Preset difference value between real-time turbine rotating speed and real time engine rotating speed, in the present embodiment, which is 100rpm, in reality
When secondary speed rise to the preset difference value and less than real time engine rotating speed when, first stage oil-filled end enters immediately
Second stage is oil-filled, it is oil-filled in the first stage after secondary speed when rising to target turbine rotating speed, second stage is oil-filled
Terminate, and the oil-filled oil-filled rate of second stage is less than first stage oil-filled oil-filled rate, in the present embodiment, described first
Ratio between the stage oil-filled oil-filled oil-filled rate of oil-filled rate and second stage is 1.2.
As shown in Figure 3 and Figure 4, the X-axis of plane right-angle coordinate indicates that time t, Y axis indicates rotating speed N, Enginespeed
Indicate that engine speed, Tubinspeed indicate secondary speed, L/ml indicates clutch oil-filled quantity, in t1 time points corresponding whirlpool
Wheel speed is the real-time turbine rotating speed before downshift, the target turbine rotating speed after t4 time points corresponding secondary speed is downshift,
Curve within the t1-t4 periods is secondary speed variation tendency of vehicle during sliding downshift, and real-time turbine rotating speed exists
It rises to target turbine rotating speed in the t1-t4 periods, completes downshift, and when t3 time points in uphill process, secondary speed
Synchronous with engine speed, therefore, during downshift, secondary speed from low to high and passes through engine speed.
In order to reduce shift shock, during downshift, TCU of the present invention is oil-filled to clutch to be divided into two stage controls,
As shown in figure 4, L1 is the clutch first stage oil-filled control of t1-t2 periods, L2 is the clutch second of t2-t4 periods
Difference 100rpm, the t2 time point of stage oil-filled control, t2 time points corresponding secondary speed and real time engine rotating speed is
TCU carries out clutch the start time point of the oil-filled control of second stage, is that TCU carries out second-order to clutch at t3 time points
Secondary speed is synchronous with engine speed in section Oil feeding process, can directly find out filling for clutch first stage oil-filled L1 from Fig. 4
Oily slope is larger, and the oil-filled slope of the oil-filled L2 of clutch second stage is smaller, whirlpool during the oil-filled L2 of clutch second stage
Wheel speed can pass through engine speed, and the oil-filled slopes of the oil-filled L2 of clutch second stage are smaller so that secondary speed passes through real-time hair
The process of motivation rotating speed becomes more gentle and soft, substantially improves the shift shock of automatic transmission internal gear.
Embodiment 2
The control method of this improvement vehicle sliding downshift impact, includes the following steps：
Step 1：The real-time rotating speed of engine is acquired by the first collector and is sent to TCU and by the second collector
It acquires the real-time rotating speed of turbine and is sent to TCU；
Step 2：TCU writes down real-time turbine rotating speed and real time engine rotating speed at this time according to downshift signal post, and according to
Real-time turbine rotating speed calculates the target turbine rotating speed after the completion of downshift；
Step 3：TCU compares real-time turbine rotating speed and target turbine rotating speed with real time engine rotating speed respectively, if
When real time engine rotating speed is more than real-time turbine rotating speed and is less than target turbine rotating speed, TCU carries out clutch to be segmented oil-filled control
System；When real-time turbine rotating speed and target turbine rotating speed are respectively less than real time engine rotating speed, clutch be segmented oil-filled
Control；When real-time turbine rotating speed and target turbine rotating speed are all higher than real time engine rotating speed, segmentation is not carried out to clutch and is filled
Oil control
Step 4：TCU stores the preset difference value between real-time turbine rotating speed and real time engine rotating speed, turns in real-time turbine
When speed rises to the preset difference value and is less than real time engine rotating speed, first stage oil-filled end enters second stage immediately
It is oil-filled, it is oil-filled in the first stage after secondary speed when rising to target turbine rotating speed, the oil-filled end of second stage, and
Two-stage oil-filled oil-filled rate is less than first stage oil-filled oil-filled rate.
The target gear of automatic transmission by TCU compares real-time turbine rotating speed, real time engine rotating speed after changing
For magnitude relationship between target turbine rotating speed three to determine whether will appear shift shock, confirmation will appear shift shock
Afterwards, TCU carries out the oil-filled control of two-part to clutch；Therefore, oil-filled in the first stage so that secondary speed is with faster speed
Near real-time engine speed, second stage is oil-filled so that secondary speed is gradually turned with real time engine with more slow speed
Speed is synchronous, until just complete downshift after reaching target turbine rotating speed, in second stage Oil feeding process, the variation of secondary speed compared with
It is slow so that the process that secondary speed passes through real time engine rotating speed becomes more gentle and soft, substantially improves automatic
The shift shock of speed changer internal gear, and what the rate that first stage oil-filled rate is very fast and second stage is oil-filled was constituted more slowly
The oil-filled mode of two-part takes into account the downshift time while improving shift shock, ensures that vehicle is completed in a relatively short time drop
Gear, downshift response are in time and comfortable.
In the present embodiment, the preset difference value in the step 4 is 100rpm.
In the present embodiment, first stage in the step 4 oil-filled oil-filled rate and the oil-filled oil-filled speed of second stage
Ratio between rate is 1.2.
Specific embodiment described herein is only an example for the spirit of the invention.Technology belonging to the present invention is led
The technical staff in domain can make various modifications or additions to the described embodiments or replace by a similar method
In generation, however, it does not deviate from the spirit of the invention or beyond the scope of the appended claims.
Claims (10)
1. a kind of control device improving the impact of vehicle sliding downshift, including
TCU；
First collector, real-time rotating speed for acquiring engine are simultaneously sent to TCU；With
Second collector, real-time rotating speed for acquiring turbine are simultaneously sent to TCU, which is characterized in that
The TCU writes down real-time turbine rotating speed and real time engine rotating speed at this time according to downshift signal post, and according to real-time whirlpool
Wheel speed calculates the target turbine rotating speed after the completion of downshift；Real-time turbine rotating speed and target turbine rotating speed are sent out with real-time respectively
Motivation rotating speed is compared, if real time engine rotating speed be more than real-time turbine rotating speed and less than target turbine rotating speed, TCU to from
Clutch is oil-filled to be carried out being segmented oil-filled control；
TCU stores the preset difference value between real-time turbine rotating speed and real time engine rotating speed, this is risen in real-time turbine rotating speed
Preset difference value and when less than real time engine rotating speed, first stage oil-filled end, it is oil-filled to enter second stage immediately, first
When secondary speed after stage is oil-filled rises to target turbine rotating speed, the oil-filled end of second stage, and second stage is oil-filled
Oil-filled rate be less than first stage oil-filled oil-filled rate.
2. a kind of control device improving the impact of vehicle sliding downshift according to claim 1, which is characterized in that described
Preset difference value is 100rpm.
3. a kind of control device improving the impact of vehicle sliding downshift according to claim 1, which is characterized in that described
Ratio between the first stage oil-filled oil-filled oil-filled rate of oil-filled rate and second stage is 1.2.
4. according to a kind of control device improving the impact of vehicle sliding downshift of claim 1-3 any one of them, feature exists
In when the real-time turbine rotating speed and target turbine rotating speed are respectively less than real time engine rotating speed, not being segmented to clutch
Oil-filled control.
5. according to a kind of control device improving the impact of vehicle sliding downshift of claim 1-3 any one of them, feature exists
In when the real-time turbine rotating speed and target turbine rotating speed are all higher than real time engine rotating speed, not being segmented to clutch
Oil-filled control.
6. a kind of control method improving the impact of vehicle sliding downshift, which is characterized in that include the following steps：
Step 1：The real-time rotating speed of engine is acquired by the first collector and is sent to TCU and whirlpool is acquired by the second collector
The real-time rotating speed of wheel is simultaneously sent to TCU；
Step 2：TCU writes down real-time turbine rotating speed and real time engine rotating speed at this time according to downshift signal post, and according to real-time
Secondary speed calculates the target turbine rotating speed after the completion of downshift；
Step 3：TCU compares real-time turbine rotating speed and target turbine rotating speed with real time engine rotating speed respectively, if in real time
When engine speed is more than real-time turbine rotating speed and is less than target turbine rotating speed, TCU carries out clutch to be segmented oil-filled control；
Step 4：TCU stores the preset difference value between real-time turbine rotating speed and real time engine rotating speed, on real-time turbine rotating speed
It rises to the preset difference value and when less than real time engine rotating speed, first stage oil-filled end, it is oil-filled to enter second stage immediately,
When secondary speed after oil-filled in the first stage rises to target turbine rotating speed, the oil-filled end of second stage, and second-order
The oil-filled oil-filled rate of section is less than first stage oil-filled oil-filled rate.
7. a kind of control method improving the impact of vehicle sliding downshift according to claim 6, which is characterized in that the step
Preset difference value in rapid 4 is 100rpm.
8. a kind of control method improving the impact of vehicle sliding downshift according to claim 6, which is characterized in that the step
Ratio between first stage in rapid 4 oil-filled oil-filled oil-filled rate of oil-filled rate and second stage is 1.2.
9. a kind of control method of improvement vehicle sliding downshift impact described according to claim 6 or 7 or 8, which is characterized in that
In the step 3 when real-time turbine rotating speed and target turbine rotating speed are respectively less than real time engine rotating speed, clutch is not carried out
It is segmented oil-filled control.
10. a kind of control method of improvement vehicle sliding downshift impact described according to claim 6 or 7 or 8, feature exist
In, in the step 3 when real-time turbine rotating speed and target turbine rotating speed are all higher than real time engine rotating speed, not to clutch into
Row is segmented oil-filled control.
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| CN201810380677.0A CN108533740B (en) | 2018-04-25 | 2018-04-25 | Control device and method for improving vehicle sliding downshift impact |
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|---|---|---|---|
| CN201810380677.0A CN108533740B (en) | 2018-04-25 | 2018-04-25 | Control device and method for improving vehicle sliding downshift impact |
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| CN108533740B CN108533740B (en) | 2020-03-27 |
Family
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Cited By (1)
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| CN114017495A (en) * | 2021-10-22 | 2022-02-08 | 浙江吉利控股集团有限公司 | Control method and system for vehicle sliding downshift |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114017495A (en) * | 2021-10-22 | 2022-02-08 | 浙江吉利控股集团有限公司 | Control method and system for vehicle sliding downshift |
| CN114017495B (en) * | 2021-10-22 | 2023-08-11 | 浙江吉利控股集团有限公司 | Control method and system for vehicle sliding down shift |
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| CN108533740B (en) | 2020-03-27 |
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