CN114135657A - Gearbox P-gear returning control system and strategy supporting full-automatic car washing function - Google Patents
Gearbox P-gear returning control system and strategy supporting full-automatic car washing function Download PDFInfo
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- CN114135657A CN114135657A CN202111431784.XA CN202111431784A CN114135657A CN 114135657 A CN114135657 A CN 114135657A CN 202111431784 A CN202111431784 A CN 202111431784A CN 114135657 A CN114135657 A CN 114135657A
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- vehicle speed
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- 238000005406 washing Methods 0.000 title claims abstract description 24
- 230000005540 biological transmission Effects 0.000 claims abstract description 19
- 230000006835 compression Effects 0.000 claims description 13
- 238000007906 compression Methods 0.000 claims description 13
- 238000011217 control strategy Methods 0.000 claims description 8
- 230000007246 mechanism Effects 0.000 claims description 8
- 210000000078 claw Anatomy 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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Classifications
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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
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/36—Inputs being a function of speed
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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
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/40—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism comprising signals other than signals for actuating the final output mechanisms
- F16H63/48—Signals to a parking brake or parking lock; Control of parking locks or brakes being part of the transmission
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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
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/36—Inputs being a function of speed
- F16H59/44—Inputs being a function of speed dependent on machine speed of the machine, e.g. the vehicle
- F16H2059/446—Detecting vehicle stop, i.e. the vehicle is at stand still, e.g. for engaging parking lock
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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
- F16H2312/00—Driving activities
- F16H2312/20—Start-up or shut-down
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
Abstract
The invention relates to the technical field of gear shifting control systems of automobile transmissions, in particular to a P-gear returning control system and strategy of a gearbox supporting a full-automatic vehicle washing function, which comprises the following steps: s1, the engine is turned off, and the current gear of the gearbox is in the N gear; s2, the ECU judges whether the vehicle speed signal is effective, and if the vehicle speed signal is effective, the gearbox maintains the N gear; if the vehicle speed signal is invalid, the gearbox returns to the P gear; s3, the ECU judges whether the time of the gearbox in the N gear exceeds a calibration value or not, and if the time exceeds the calibration value, the gearbox returns to the P gear; and if the whole vehicle is electrified before reaching the calibration value, the gearbox maintains the N gear until the electric energy of the storage battery of the whole vehicle is exhausted and the gearbox automatically returns to the P gear. The invention can realize that the engine with N gear can automatically jump back to the P gear after delaying a certain time after flameout, and solves the problem that the automatic car washing of the electronic gear shifter type can jump the P gear when flameout.
Description
Technical Field
The invention relates to the technical field of gear shifting control systems of automobile transmissions, in particular to a P-gear returning control system and strategy of a gearbox supporting a full-automatic vehicle washing function.
Background
With the development and progress of science and technology, more and more automatic products appear in our lives, for example, the appearance of automatic car washers brings great convenience to people's car washing work. The driver only needs to drive the vehicle to the inlet of the automatic car washer, stop the vehicle to extinguish the fire and switch the vehicle to neutral (N), the vehicle can be automatically dragged to complete car washing through the car washer, and the duration of the whole process is only a few minutes. Compared with manual car washing, the time period is shortened by several times, and the car washing machine is very popular with the users.
The rapid development of the automobile industry also enables more and more middle and low-end automatic transmission models to be matched with electronic gear shifters. The electronic gear shifter can control gear switching of the gearbox without connection of mechanical parts, so that arrangement and installation space of the whole vehicle is reduced, and driving intelligence is brought. For the safety of driving, the logic control is added to the gear shifting of the electronic gear shifter type to fully identify the intention of a driver and prevent the potential safety hazard caused by misoperation. The automatic parking gear (P) returning control after the engine is switched off is to ensure the vehicle slipping risk caused by the fact that a driver forgets to switch to the P gear after the non-P gear is switched off.
But the safety protection strategy brings trouble to the current self-service car washing scene with high use frequency: after the vehicle is flamed out, the neutral gear cannot be maintained all the time, and the vehicle cannot pass through the self-service car washer.
Based on the reasons, the invention provides a control system and a control strategy for returning to the P gear of the gearbox, which support the full-automatic vehicle washing function, and can delay the return to the P gear and support the control strategy for full-automatic vehicle washing.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a gearbox P-gear returning control system and strategy supporting a full-automatic vehicle washing function, can realize that the N-gear engine can automatically jump back to the P gear after a certain time delay after flameout, and solves the problem that the flameout automatic vehicle washing of an electronic gear shifter type can jump the P gear.
In order to realize the purpose of the invention, the invention adopts the technical scheme that:
the invention discloses a gearbox P-gear returning control system supporting a full-automatic car washing function, which comprises an ECU (electronic control Unit), a parking mechanism, an electromagnetic valve and a vehicle speed sensor, wherein the parking mechanism comprises a piston, a connecting rod, a pawl and a ratchet wheel, the piston is arranged in a piston cavity of a gearbox, the outer end of the piston is connected with one end of the connecting rod, the other end of the connecting rod is connected with a cam, a limiting buckle fixed outside is arranged on the outer wall of the connecting rod, a compression spring is arranged between the limiting buckle and the cam, one end of the pawl is provided with a shaft hole for fixing a rotating shaft, the other end of the pawl is provided with a clamping groove, a clamping block is arranged on the pawl, and the clamping block can be matched and clamped with a groove on the ratchet wheel; the cam is of a cylindrical structure with a hemispherical outer end, the clamping groove is of a semicircular structure, and the inner diameter of the clamping groove is smaller than the outer diameter of the cam;
the piston cavity is a cylindrical cavity, a through hole for a piston rod at the front end of the piston to pass through is formed in one end of the piston cavity, a compression spring is sleeved on the piston rod, the electromagnetic valve is fixed to the rear end of the piston cavity, a clamping jaw is connected to the front end of the electromagnetic valve, and a clamping rod for clamping the clamping jaw is arranged at the rear end of the piston;
and the ECU is respectively and electrically connected with the electromagnetic valve and the vehicle speed sensor.
The clamping jaw is fixed on a valve rod of the electromagnetic valve and can drive clamping.
The inner wall of the clamping groove is provided with an arc-shaped groove, and the outer diameter of the cross section of the arc-shaped groove is gradually reduced from the inner end to the outer end.
A control strategy for returning P gear of a gearbox supporting a full-automatic car washing function comprises the following steps,
s1, the engine is turned off, and the current gear of the gearbox is in the N gear;
s2, the ECU judges whether the vehicle speed signal is effective, and if the vehicle speed signal is effective, the gearbox maintains the N gear; if the vehicle speed signal is invalid, the gearbox returns to the P gear;
s3, the ECU judges whether the time of the gearbox in the N gear exceeds a calibration value or not, and if the time exceeds the calibration value, the gearbox returns to the P gear; and if the whole vehicle is electrified before reaching the calibration value, the gearbox maintains the N gear until the electric energy of the storage battery of the whole vehicle is exhausted and the gearbox automatically returns to the P gear.
In step S2, if the vehicle speed signal is valid, the ECU controls the solenoid valve to charge, and the front-end pawl clamps the clamping rod at the rear end of the piston, so that the piston cannot be reset, and the transmission maintains the N-gear.
In the step S3, if the ECU determines that the time of the transmission in the N gear exceeds the calibration value, the ECU controls the electromagnetic valve to be powered off, the piston is reset under the action of the compression spring, and the transmission automatically returns to the P gear; if the whole vehicle is powered on before the calibration value is reached, the electromagnetic valve is continuously powered by the electric energy of the storage battery, so that the gearbox always maintains the N gear.
The invention has the beneficial effects that:
(1) the invention can realize that the engine with N gear can automatically jump back to the P gear after delaying a certain time after flameout, and solves the problem that the automatic car washing of the electronic gear shifter type can jump the P gear when flameout.
Drawings
FIG. 1 is a flow chart of a transmission P-range return control strategy supporting a full automatic vehicle wash function according to the present invention;
FIG. 2 is a schematic structural diagram of a transmission P-range returning control system supporting a full-automatic vehicle washing function according to the present invention;
FIG. 3 is a schematic view of the connection between the piston and the solenoid valve according to the present invention;
FIG. 4 is a partial schematic view of the pawl of the present invention;
FIG. 5 is a schematic view of the connection of a part of the mechanism of the present invention.
In the figure: 1ECU, 2 parking mechanisms, 3 solenoid valves, 4 claws, 5 speed sensors, 21 pistons, 22 connecting rods, 23 pawls, 24 ratchets, 25 cams, 26 shaft holes, 27 clamping grooves, 28 piston cavities, 29 piston rods, 30 compression springs, 31 clamping rods, 32 arc-shaped grooves, 33 clamping blocks, 34 grooves and 35 limiting buckles.
Detailed Description
The invention is further illustrated below:
referring to figures 1-5 of the drawings,
the invention discloses a gearbox P-gear returning control system supporting a full-automatic car washing function, which comprises an ECU1, a parking mechanism 2, an electromagnetic valve 3 and a vehicle speed sensor 5, wherein the parking mechanism 2 comprises a piston 21, a connecting rod 22, a pawl 23 and a ratchet wheel 24, the piston 21 is arranged in a piston cavity 28 of a gearbox, the outer end of the piston 21 is connected with one end of the connecting rod 22, the other end of the connecting rod 22 is connected with a cam 25, a limiting buckle 35 fixed to the outside is arranged on the outer wall of the connecting rod 22, a compression spring 30 is arranged between the limiting buckle 35 and the cam 25, one end of the pawl 23 is provided with a shaft hole 26 for fixing a rotating shaft, the other end of the pawl 23 is provided with a clamping groove 27, a clamping block 33 is arranged on the pawl 23, and the clamping block 33 can be matched and clamped with a groove 34 on the ratchet wheel 24; the cam 25 is a cylindrical structure with a hemispherical outer end, the clamping groove 27 is a semicircular structure, and the inner diameter of the clamping groove is smaller than the outer diameter of the cam 25; the piston cavity 28 is a cylindrical cavity, one end of the piston cavity is provided with a through hole for a piston rod 29 at the front end of the piston 21 to pass through, the rear end of the piston cavity 28 is fixed with the electromagnetic valve 3, the front end of the electromagnetic valve 3 is connected with the clamping jaw 4, and the rear end of the piston 21 is provided with a clamping rod 31 for clamping the clamping jaw 4; the ECU1 is electrically connected with the electromagnetic valve 3 and the vehicle speed sensor 5 respectively, and the vehicle speed sensor 4 is used for monitoring a vehicle speed signal and transmitting the vehicle speed signal to the ECU 1.
As shown in fig. 1 and 2, a piston 21 which is matched with the piston cavity 28 in the gearbox to slide is arranged in the piston cavity 28; after the engine is started, oil pressure is built in the gearbox to drive the piston 21 to move, the piston rod 29 at the front end of the piston 21 drives the connecting rod 22 to be connected, the compression spring 30 is in a compression state at the moment, the connecting rod 22 drives the movable cam 25 to move towards the inner end, so that the hemispherical structure at the outer end of the cam 25 is separated from the clamping groove 27, the pawl 23 rotates clockwise by taking the shaft hole 26 as a center, the clamping block 33 on the pawl 23 is disengaged from the groove 34, and P-gear unlocking is achieved; when the engine is shut down, the oil pressure in the gearbox is removed, the piston 21 returns under the reset action of the compression spring 30, the piston rod 29 drives the connecting rod 22 and the cam 25 to move towards the outer end, the hemispherical structure at the outer end of the cam 25 is clamped with the clamping groove 27 again, the pawl 23 is driven to rotate anticlockwise, the clamping block 33 is clamped with the clamping groove 34, and automatic P return blocking is realized;
at this time, when the ECU1 controls the solenoid valve 3 to be energized, the spool of the solenoid valve 3 moves in the axial direction thereof, and the claws 4 at the front end of the solenoid valve 3 are caused to grip the gripping rod 31 at the rear end of the piston 21, whereby the N-range state can be maintained.
Be equipped with arc wall 32 on the inner wall of draw-in groove 27, the cross-section external diameter of arc wall 32 is reduced to the outer end by inner for compression spring 30 resets and drives cam 25 and move to the outer end after the engine stalls, and the hemispherical structure of cam 25 outer end can be more level and smooth pass through arc wall 32 and draw-in groove 27 block.
The invention discloses a control strategy for returning P gear of a gearbox supporting a full-automatic car washing function, which comprises the following steps,
s1, the engine is turned off, and the current gear of the gearbox is in the N gear;
s2, the ECU judges whether the vehicle speed signal is effective, and if the vehicle speed signal is effective, the gearbox maintains the N gear; if the vehicle speed signal is invalid, the gearbox returns to the P gear;
s3, the ECU judges whether the time of the gearbox in the N gear exceeds a calibration value or not, and if the time exceeds the calibration value, the gearbox returns to the P gear; and if the whole vehicle is electrified before reaching the calibration value, the gearbox maintains the N gear until the electric energy of the storage battery of the whole vehicle is exhausted and the gearbox automatically returns to the P gear.
In step S2, if the vehicle speed signal is valid, the ECU controls the solenoid valve to charge, and the front-end pawl clamps the clamping rod at the rear end of the piston, so that the piston cannot be reset, and the transmission maintains the N-gear.
In the step S3, if the ECU determines that the time of the transmission in the N gear exceeds the calibration value, the ECU controls the electromagnetic valve to be powered off, the piston is reset under the action of the compression spring, and the transmission automatically returns to the P gear; if the whole vehicle is powered on before the calibration value is reached, the electromagnetic valve is continuously powered by the electric energy of the storage battery, so that the gearbox always maintains the N gear.
As shown in fig. 1, when the engine is turned off, the transmission is in the N gear, and the vehicle speed sensor 4 detects that a vehicle speed signal is valid, the vehicle speed signal is transmitted to the ECU1, and the ECU1 activates the function of delaying the transmission to return to the P gear, that is, the electromagnetic valve 3 controlling the transmission to return to the P gear is opened, so that the claw 4 on the electromagnetic valve catches the parking piston 21 of the transmission, and the transmission is always in the N gear;
when the time of the gearbox in the N gear exceeds a calibrated value (twenty minutes), the electromagnetic valve 3 is automatically powered off, the piston 21 returns under the action of the compression spring 30, and the gearbox automatically returns to the P gear;
if the whole vehicle is electrified before reaching the calibration value (twenty minutes), the electromagnetic valve 3 is continuously supplied with power through the electric energy of the storage battery, so that the gearbox keeps the N gear all the time until the electric energy of the storage battery of the whole vehicle is exhausted and the gearbox automatically returns to the P gear.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent modifications made by the present invention and the contents of the drawings or directly or indirectly applied to the related technical fields are included in the scope of the present invention.
Claims (6)
1. The utility model provides a support gearbox of full-automatic carwash function to return P and keep off control system which characterized in that: comprises an ECU (1), a parking mechanism (2), an electromagnetic valve (3) and a vehicle speed sensor (5), the parking mechanism (2) comprises a piston (21), a connecting rod (22), a pawl (23) and a ratchet wheel (24), the piston (21) is arranged in a piston cavity (28) of the gearbox, the outer end of the piston (21) is connected with one end of the connecting rod (22), the other end of the connecting rod (22) is connected with a cam (25), the outer wall of the connecting rod (22) is provided with a limiting buckle (35) fixed outside, a compression spring (30) is arranged between the limiting buckle (35) and the cam (25), one end of the pawl (23) is provided with a shaft hole (26) for fixing the rotating shaft, the other end is provided with a clamping groove (27), a clamping block (33) is arranged on the pawl (23), and the clamping block (33) can be matched and clamped with a groove (34) in the ratchet wheel (24); the cam (25) is of a cylindrical structure with a hemispherical outer end, the clamping groove (27) is of a semicircular structure, and the inner diameter of the clamping groove is smaller than the outer diameter of the cam (25);
the piston cavity (28) is a cylindrical cavity, one end of the piston cavity is provided with a through hole for a piston rod (29) at the front end of the piston (21) to pass through, the rear end of the piston cavity (28) is fixed with the electromagnetic valve (3), the front end of the electromagnetic valve (3) is connected with a clamping jaw (4), and the rear end of the piston (21) is provided with a clamping rod (31) for clamping the clamping jaw (4);
the ECU (1) is electrically connected with the electromagnetic valve (3) and the vehicle speed sensor (5) respectively.
2. The gearbox P-gear returning control system supporting the full-automatic vehicle washing function according to claim 1, characterized in that: the clamping jaw (4) is fixed on a valve rod of the electromagnetic valve (3) and can drive clamping.
3. The gearbox P-gear returning control system supporting the full-automatic vehicle washing function according to claim 2, characterized in that: be equipped with arc wall (32) on the inner wall of draw-in groove (27), the cross-section external diameter of arc wall (32) is reduced to the outer end by inner gradually.
4. The utility model provides a gearbox that supports full-automatic carwash function returns P and keeps off control strategy which characterized in that: comprises the following steps of (a) carrying out,
s1, the engine is turned off, and the current gear of the gearbox is in the N gear;
s2, the ECU judges whether the vehicle speed signal is effective, and if the vehicle speed signal is effective, the gearbox maintains the N gear; if the vehicle speed signal is invalid, the gearbox returns to the P gear;
s3, the ECU judges whether the time of the gearbox in the N gear exceeds a calibration value or not, and if the time exceeds the calibration value, the gearbox returns to the P gear; and if the whole vehicle is electrified before reaching the calibration value, the gearbox maintains the N gear until the electric energy of the storage battery of the whole vehicle is exhausted and the gearbox automatically returns to the P gear.
5. The gearbox P-range returning control strategy supporting the full-automatic vehicle washing function according to claim 4, is characterized in that: in step S2, if the vehicle speed signal is valid, the ECU controls the solenoid valve to charge, and the front-end pawl clamps the clamping rod at the rear end of the piston, so that the piston cannot be reset, and the transmission maintains the N-gear.
6. The gearbox P-range returning control strategy supporting the full-automatic vehicle washing function according to claim 3, is characterized in that: in the step S3, if the ECU determines that the time of the transmission in the N gear exceeds the calibration value, the ECU controls the electromagnetic valve to be powered off, the piston is reset under the action of the compression spring, and the transmission automatically returns to the P gear; if the whole vehicle is powered on before the calibration value is reached, the electromagnetic valve is continuously powered by the electric energy of the storage battery, so that the gearbox always maintains the N gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111431784.XA CN114135657A (en) | 2021-11-29 | 2021-11-29 | Gearbox P-gear returning control system and strategy supporting full-automatic car washing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111431784.XA CN114135657A (en) | 2021-11-29 | 2021-11-29 | Gearbox P-gear returning control system and strategy supporting full-automatic car washing function |
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| Publication Number | Publication Date |
|---|---|
| CN114135657A true CN114135657A (en) | 2022-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111431784.XA Pending CN114135657A (en) | 2021-11-29 | 2021-11-29 | Gearbox P-gear returning control system and strategy supporting full-automatic car washing function |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2494196A (en) * | 2011-09-05 | 2013-03-06 | Land Rover Uk Ltd | Transmission having park pawl which is engaged after a predetermined delay |
| US20160186859A1 (en) * | 2013-08-02 | 2016-06-30 | Honda Motor Co., Ltd. | Control device and control method for vehicle |
| CN106195259A (en) * | 2016-07-25 | 2016-12-07 | 广州汽车集团股份有限公司 | A kind of automatic transmission neutral control method |
| CN110341676A (en) * | 2019-08-01 | 2019-10-18 | 泸州容大智能变速器有限公司 | A kind of automatic gear-box built-in electronic parking control system and its control method |
| CN110360316A (en) * | 2018-04-11 | 2019-10-22 | 上海汽车集团股份有限公司 | A kind of gearbox and its automatic parking executive device |
| CN210290721U (en) * | 2019-06-27 | 2020-04-10 | 长城汽车股份有限公司 | Automatic transmission emergency unlocking device, automatic transmission and vehicle |
-
2021
- 2021-11-29 CN CN202111431784.XA patent/CN114135657A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2494196A (en) * | 2011-09-05 | 2013-03-06 | Land Rover Uk Ltd | Transmission having park pawl which is engaged after a predetermined delay |
| US20160186859A1 (en) * | 2013-08-02 | 2016-06-30 | Honda Motor Co., Ltd. | Control device and control method for vehicle |
| CN106195259A (en) * | 2016-07-25 | 2016-12-07 | 广州汽车集团股份有限公司 | A kind of automatic transmission neutral control method |
| CN110360316A (en) * | 2018-04-11 | 2019-10-22 | 上海汽车集团股份有限公司 | A kind of gearbox and its automatic parking executive device |
| CN210290721U (en) * | 2019-06-27 | 2020-04-10 | 长城汽车股份有限公司 | Automatic transmission emergency unlocking device, automatic transmission and vehicle |
| CN110341676A (en) * | 2019-08-01 | 2019-10-18 | 泸州容大智能变速器有限公司 | A kind of automatic gear-box built-in electronic parking control system and its control method |
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Application publication date: 20220304 |
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