CN114688243B - double-MCU automatic transmission control system with quick gear shifting mode - Google Patents
double-MCU automatic transmission control system with quick gear shifting mode Download PDFInfo
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- CN114688243B CN114688243B CN202210302546.7A CN202210302546A CN114688243B CN 114688243 B CN114688243 B CN 114688243B CN 202210302546 A CN202210302546 A CN 202210302546A CN 114688243 B CN114688243 B CN 114688243B
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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
- F16H61/02—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 characterised by the signals used
- F16H61/0202—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 characterised by the signals used the signals being electric
- F16H61/0204—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 characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
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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
- F16H61/0437—Smoothing ratio shift by using electrical signals
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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
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
- F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
- F16H61/32—Electric motors actuators or related electrical control means therefor
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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
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
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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
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
- F16H2063/3083—Shift finger arrangements, e.g. shape or attachment of shift fingers
Abstract
The invention provides a double MCU automatic transmission control system with a rapid gear shifting mode; the power supply module is respectively connected with the first MCU and the second MCU through the power supply management module, and the first MCU and the second MCU are connected through a serial bus; the two MCUs are combined into an automatic transmission control system, and when the dual-core MCU is controlled in a serial bus mode, the auxiliary MCU can strengthen various analog signal acquisition and motor driving which are most critical to the driving process of the automobile. Therefore, the analog signal is prevented from being interfered, the motor is driven more accurately, and the automobile driving is enabled to be smoother and more comfortable. According to the invention, the automatic transmission of the vehicle is controlled by the double MCUs respectively, so that signals are prevented from being interfered, an AMT speed change system cannot be in error, each gear in the AMT speed change system is correspondingly provided with a gear shifting finger, the gear shifting time can be saved, and the frustration caused during gear shifting can be avoided.
Description
Technical Field
The invention relates to a double MCU automatic transmission control system with a quick gear shifting mode.
Background
The existing automatic transmission gear selecting and shifting system of the vehicle AMT and other control modules are controlled by a main control module, and the main control module needs to collect and process a plurality of information at the same time when a plurality of actions of the transmission are needed in many times;
in order to prevent the operation pressure of the main control module from being large, many vehicle controllers adopt double MCUs, for example, a double MCU electric vehicle controller with the publication number of CN108279610B consists of a main MCU and an auxiliary MCU, but controls the electric vehicle, the running speed of the vehicle is controlled by controlling the rotation of a motor when the electric vehicle is in speed change, the speed of the vehicle can be monitored by detecting the speed of a rotating shaft and the current of the motor, and the vehicle can be monitored by using the main MCU as a vehicle control unit in fact, the auxiliary MCU is used as a monitoring unit for monitoring the main MCU, and the main MCU is replaced for controlling the vehicle when the main MCU breaks down. Since the automobile is still controlled by one MCU during operation, the situation that the main controller faces the system failure still exists.
For example: automobile AMT gear shifting rule research and electric control platform design thereof (Xu Yong Chaohan university published time: 2016-05-18 Shuoshi) disclose that a double MCU is used as a control system to control an automatic transmission (AMT), but the automatic transmission is still a traditional AMT speed change system, a gear shifting motor and a gear selecting motor are required to be controlled to cooperatively shift in the control process of the controller, the gear shifting motor is required to be controlled to move back in the gear shifting process of the controller, then the gear selecting motor is controlled to select gears, finally the gear is shifted through the gear shifting motor, the gear shifting speed is still limited by the gear shifting finger gear selecting time, and the gear shifting process is not smooth.
And current AMT speed change system all stirs through a shift finger between three keeps off, as shown in fig. 3 and 5, when changing the fender, need shift the motor with shift finger to return to the neutral gear from current fender position, then push the shift finger to corresponding fender shift fork, then shift finger is in the promotion shift fork to appointed fender position accomplish the shift, because shift finger need make a round trip to slide between three shift forks and select keeps off, result in the fender shift fork to have certain motion error, and this error can be along with wearing and tearing grow, just lead to speed change system to select fender obstacle and the sense of setback in the shift process.
In order to improve the gear shifting efficiency, a plurality of new gear shifting modes, such as an automatic gear shifting control system for a stand alone mechanical double flow transmission system with a publication number of CN101695903A, utilize a plurality of gear shifting driving arms to respectively correspond to gears for gear shifting, and the gear shifting driving arms are driven by gear shifting adjusting pull rods respectively, the gear shifting adjusting pull rods are driven by gear shifting driving devices, but the gear shifting driving devices are driven by hydraulic pressure, and gear shifting walls in the gear shifting driving devices are driven by piston rods to select gears, so that one gear shifting block is required to be selected, and then the gear shifting driving arms are driven by the gear shifting adjusting pull rods to shift gears. The gear shifting step can be summarized into a gear-reversing to neutral gear, the piston rod drives the gear-sliding wall to select gears, the pull rod moves along with the gear-shifting block to pull the corresponding vertical shaft to shift gears, and the operation steps are three, although the accuracy of the hydraulic control piston is utilized to improve the gear shifting accuracy, the transmission steps are excessive in the gear shifting process, the whole gear shifting process is overlong in time, the pause feeling still exists, and the power interruption of a vehicle is easily caused in the gear shifting process.
Disclosure of Invention
In order to solve the technical problems, the invention provides a double MCU automatic transmission control system with a quick gear shifting mode.
The invention is realized by the following technical scheme.
The invention provides a double MCU automatic transmission control system with a rapid gear shifting mode; the power supply module is respectively connected with the first MCU and the second MCU through a power supply management module, and the first MCU and the second MCU are connected through a serial bus; the two MCUs are combined into an automatic transmission control system, and when the dual-core MCU is controlled in a serial bus mode, the auxiliary MCU can strengthen various analog signal acquisition and motor driving which are most critical to the driving process of the automobile. Therefore, the analog signal is prevented from being interfered, the motor is driven more accurately, and the automobile driving is enabled to be smoother and more comfortable.
The input end of the first MCU is respectively connected with the switching value signal module and the first analog value module through the signal processing circuit A, and the output end of the first MCU is respectively connected with the communication module, the driving module, the DA conversion circuit and the first motor driving module;
the input end of the second MCU is respectively connected with the high-speed signal module and the second analog quantity module, the high-speed signal module is also connected with the input end of the first MCU, the output end of the second micro-control module is connected with the second motor driving module, and the first motor driving module and the second motor driving module are connected with a motor power supply; the second control module is used for controlling a transmission motor (a clutch motor, a gear shifting motor A, a gear shifting motor B and a gear shifting motor C) and an electronic hand brake. The second MCU collects a rotating shaft rotating speed signal, an engine rotating speed signal, a vehicle speed signal, a clutch position signal, a gear shifting position signal and a hand brake position signal, and then sends control instructions to the clutch motor, the gear shifting motor A, the gear shifting motor B, the gear shifting motor C and the electronic hand brake through operation processing, so that automatic gear shifting is realized.
The second motor driving module is connected with the speed changing module, the speed changing module comprises three gear shifting fingers, the three gear shifting fingers respectively control three gear shifting fork blocks, and the three gear shifting fingers are respectively driven by three motors. The three gear shifting fork blocks are respectively a 1/2 gear shifting fork block, a 3/4 gear shifting fork block and a 5/R gear shifting fork block. The 3 gear shifting motor executing mechanisms are preset at 3 gear selecting positions, and the 3 gear shifting motor executing mechanisms and 3 shifting fork shifting blocks of the transmission are in one-to-one correspondence and have unchanged relative positions. Each motor drives a corresponding gear shifting finger and a shifting fork shifting block corresponding to the gear shifting finger to finish gear shifting according to a control instruction sent by the TCU of the AMT controller. Each instantaneous AMT controller TCU only allows one motor to drive the gear shifting finger, and the other two motors are required to keep the actuating mechanism and the corresponding shifting fork shifting block in a neutral position.
And when the second MCU controls the motors, only one gear shifting motor is driven at the same time. The three gear shifting fingers are prevented from simultaneously enabling the gear shifting fork block to be placed in a gear, so that gear shifting frustration is increased, and the transmission is easy to damage.
When the first MCU or the second MCU is abnormal, the normal MCU takes over the work of the other MCU. The vehicle can be ensured to normally run after the controller is damaged.
The first MCU receives the vehicle switching value signal and the analog quantity signal 1 and executes corresponding tasks, and the second MCU acquires the vehicle speed signal and the transmission analog signal to control the motor to drive the transmission to shift gears. The switching value signals comprise a braking signal, a generator starting signal, a power economy mode signal, a steep slope mode signal and a key switch signal. The first analog quantity module comprises a power supply voltage signal, an acceleration accelerator signal, a gear position signal, an air inlet temperature signal, a throttle valve signal and a brake analog signal. The first MCU is used for acquiring an engine starting signal, a brake pedal signal, a power supply voltage signal, an accelerator signal, a gear handle position signal, an air inlet temperature signal, a throttle valve signal, a brake analog signal, an engine rotating speed signal, a vehicle speed signal and the like, and is connected with the communication CAN and the calibration CAN through the communication module after being processed by an algorithm; the engine start, the accelerator pedal, the main relay and the reversing light are controlled through the driving module; the throttle is controlled by the digital-analog conversion circuit.
The first MCU also collects speed signals and speeds, monitors the speed signals and displays the speed signals on an instrument panel. The first MCU assists the second control unit in monitoring the vehicle speed and the generator state.
The second analog quantity module comprises a clutch position signal, a gear shifting position signal and a hand brake position signal. The second MCU converts the clutch position signal, the gear shifting position signal and the hand brake position signal into analog quantities, detects the clutch position, the gear position and the hand brake position, and provides current gear information for the second MCU.
The invention has the beneficial effects that: the vehicle is controlled by the double MCUs respectively, one MCU is used for controlling the AMT speed change system of the vehicle, and one MCU is used for collecting and calculating the speed change information of the vehicle, so that the signals collected by the speed control MCU can be prevented from being interfered, the AMT speed change system can not have errors such as power interruption, and the controller is high in processing speed, so that the response speed of the speed change system is accelerated;
each gear in the AMT speed change system corresponds to a gear shifting finger, and when shifting gears, the controller only controls a motor corresponding to the gear to enable the gear shifting shaft to sequentially shift the corresponding gear shifting fork, so that the gear selecting process is omitted, the gear selecting motor is not needed, the time required by the original gear shifting finger for gear selection is saved, and the frustration caused by gear shifting is avoided due to the reduction of the gear shifting time.
Drawings
FIG. 1 is a schematic diagram of the system principle of the present invention;
FIG. 2 is a schematic illustration of a shift architecture of the present invention;
FIG. 3 is a schematic diagram of a prior art shift architecture;
FIG. 4 is a schematic diagram of the motor drive chip circuit of the present invention;
FIG. 5 is a schematic diagram of a full bridge circuit of the present invention;
FIG. 6 is a shift schematic of the shift architecture of the present invention;
in the figure: 1-gear shifting finger A, 2-gear shifting finger B, 3-gear shifting finger C, 4-gear shifting shaft A, 5-gear shifting shaft B, 6-gear shifting shaft C, 7-gear shifting motor C, 8-gear shifting motor B, 9-gear shifting motor A, 10-gear A, 11-gear B, 12-gear C,21-1/2 shift fork block A, 22-gear shifting finger, 23-3/4 shift fork block B,23-5/R shift fork block C.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the above.
As shown in fig. 1, a dual MCU automatic transmission control system with a fast shift mode; the system comprises two MCU microprocessors, wherein a first MCU is connected with a switching value signal module and a first analog value module through a signal processing circuit A, respectively collects an engine starting signal, a braking signal, a power supply voltage signal, an accelerator acceleration signal, a gear handle position signal, an air inlet temperature signal, a throttle valve signal and a braking analog signal, and is connected with a communication CAN and a calibration CAN through a communication module after being processed by an algorithm; the engine start, the accelerator pedal, the main relay and the reversing light are controlled through the driving module; controlling the throttle through the DA conversion circuit;
the second MCU is connected with the first analog quantity module and the high-speed signal module, and after the rotating shaft rotating speed signal, the engine rotating speed signal, the vehicle speed signal, the clutch position signal, the gear shifting position signal and the hand brake position signal are acquired, the control instructions are sent to the clutch motor, the gear shifting motor and the electronic hand brake through operation processing, so that automatic gear shifting is realized.
The first MCU collects engine rotation speed signals and high-speed signals simultaneously, assists the second MCU in monitoring rotation of a vehicle generator and vehicle speed, and transmits the information to a vehicle instrument for display.
The two MCUs are connected through the serial bus, data intercommunication can be realized between the two MCUs, each MCU can independently work and can also replace each other, the first MCU and the second MCU can detect and process various key analog signals and rotating speed signals, and the motor can be driven to carry out automobile control. If 1 MCU is damaged because of the fault, another MCU still can work normally, and the safety is more reliable.
As shown in fig. 2, in the AMT automatic gear shifting system, a gear shifting finger A1, a gear shifting finger B2 and a gear shifting finger C3 are used for executing gear shifting, the gear shifting finger A1, the gear shifting finger B2 and the gear shifting finger C3 are respectively connected with a gear a10, a gear B11 and a gear C12 through a gear shifting shaft A4, a gear shifting shaft B5 and a gear shifting shaft C6, the gear a10, the gear B11 and the gear C12 are respectively driven by a motor A9, a motor B8 and a motor C7, and the gear driving shaft rotates to enable the gear shifting finger to deflect and shift a gear shifting fork block to realize gear change.
In order to enable the gear shifting fingers to be on the same straight line and save vehicle space, the gear shifting shaft A4, the gear shifting shaft B5 and the gear shifting shaft C6 are processed into concentric shafts, wherein the gear shifting shaft B5 and the gear shifting shaft C6 are hollow shafts, the gear shifting shaft A4 is arranged in the gear shifting shaft B5, the gear shifting shaft B5 is arranged in the gear shifting shaft C6, the gear shifting shaft B5 and the gear shifting shaft C6 are shortened through clearance fit and coated with lubricating oil so that the gear shifting fingers do not interfere with each other, two ends of the gear shifting shaft B5 can extend out of the gear shifting shaft C6, one ends of the two ends of the gear shifting shaft A4 can extend out of the gear shifting shaft B5, and gears can be arranged at the other ends of the two ends of the gear shifting shaft A4 so that the gear shifting fingers can be connected with a motor.
As shown in fig. 6, for example, when the vehicle needs to shift from second gear to third gear, the second MCU firstly controls the clutch motor to separate the clutch, controls the gear shifting motor A9 to rotate the gear shifting fork block to neutral gear in a reverse direction, then controls the motor B8 to rotate the gear shifting finger B2 to deflect and shift the gear shifting fork block at the third gear to the third gear, and finishes gear shifting, and the second MCU only sends out one gear shifting finger movement command at the same time in order to prevent the transmission from being in a plurality of gears, and only one gear shifting motor controls the gear shifting finger to act at the same time.
Compared with the traditional AMT gear shifting mode, the gear shifting fingers need to be displaced for three times, and the two gear shifting fingers are displaced for one time respectively, so that the gear selecting time of the gear shifting fingers can be saved, each gear shifting finger always corresponds to one gear shifting fork, the gear shifting fork cannot be subjected to misoperation and misoperation touch by the gear shifting fingers, and no frustration is caused in the gear shifting process.
As shown in fig. 4, the invention drives a gear shifting motor, a clutch motor and a hand brake motor through an L9904 full-bridge driving chip, the power supply voltage of the L9904 chip is 8-28V, 4 paths of PWM are output, the highest frequency can be 30KHz, and in the AMT, the input part of the L9904 chip is provided with a DG pin, a PWM pin, an EN pin, a DIR pin, a PR pin, an RX pin, a TX pin and a K pin. The output part comprises GL1 pin, GL2 pin, GH2 pin and GH1 pin. The feedback part is provided with an S2 pin and an S1 pin. The configuration circuit part is provided with a VS pin, a GB1 pin, a SB2 pin and a GND pin.
In the input section, DG is an open drain diagnosis output pin for power supply voltage detection. The PWM foot is an input PWM waveform foot and is connected with the second MCU, and the duty ratio and the frequency of the PWM waveform are used for controlling the full bridge. And the EN pin is an enabling pin and is connected with the second MCU, and the chip operation can be turned off. DIR pins are used for direction selection in full bridge control. PR pin is cross conduction protection time, and RC that connects is used for confirming the MOS pipe and is the minimum switching time when crossing the switch-on, and RT pin, TX pin are with MCU accept and send the foot. The K pin is connected with an external K line.
At the output end, the GL1 pin, the GL2 pin, the GH2 pin and the GH1 pin are output PWM pins. The driving device is used for driving the full-bridge MOS tube, and at the feedback end, the S2 pin and the S1 pin are feedback pins. The motor voltage feedback device is used for feeding back voltages at two ends of the motor.
At the configuration end, the VS pin is a power input end, the GND pin is a grounding end, and the SB2 pin and the GB1 pin are connected with an external bootstrap capacitor end, so that the MOS tube can be opened more effectively and rapidly after the bootstrap capacitor is connected.
The L9904 full-bridge driving chip drives the full bridge to control the motors, the MOS tube is started only when the MCU inputs a correct voltage signal, only one gear shifting motor is ensured to act in the gear shifting process, the response speed is high, the gear shifting speed is greatly reduced, and the abrupt and contusion in the gear shifting process is avoided.
Claims (6)
1. A double MCU automatic transmission control system with quick gear shifting mode is characterized in that: the power supply module is respectively connected with the first MCU and the second MCU through a power supply management module, and the first MCU and the second MCU are connected through a serial bus;
the input end of the first MCU is respectively connected with the switching value signal module and the analog value module A, and the output end of the first MCU is respectively connected with the communication module, the driving module, the DA conversion circuit and the engine driving module;
the input end of the second MCU is respectively connected with the speed signal module and the analog quantity module B, the speed signal module is also connected with the input end of the first MCU, the output end of the second micro control module is connected with the variable speed driving module, and the engine driving module and the variable speed driving module are connected with the motor power supply;
the speed change driving module is connected with the speed change module, the speed change module comprises three gear shifting fingers, the three gear shifting fingers respectively control three gear shifting fork blocks, and the three gear shifting fingers are respectively driven by three gear shifting motors;
when the first MCU or the second MCU is abnormal, the normal MCU takes over the work of the other MCU;
the first MCU receives the switching value signals and analog quantity signals in the vehicle switching value signal module and the analog quantity signal module A and executes corresponding tasks, and the second MCU acquires the vehicle speed signals, the engine rotating speed signals, the road condition signals and the analog signals of the transmission in the speed signal module to control the motor to drive the transmission to shift gears;
the switching value signal comprises a braking signal, a generator starting signal, a power economy mode signal, a steep slope mode signal and a key switching signal;
the analog quantity module A comprises a power supply voltage signal, an acceleration accelerator signal, a gear position signal, an air inlet temperature signal and a brake analog signal, and also comprises a throttle signal for a vehicle with a throttle.
2. The dual MCU automatic transmission control system with fast shift mode of claim 1, wherein: the three gear shifting fork blocks are respectively a 1/2 gear shifting fork block, a 3/4 gear shifting fork block and a 5/R gear shifting fork block.
3. The dual MCU automatic transmission control system with fast shift mode of claim 1, wherein: and the second MCU only controls one gear shifting finger to act at the same time.
4. The dual MCU automatic transmission control system with fast shift mode of claim 1, wherein: the first MCU also collects speed signals and speeds, monitors the speed signals and displays the speed signals on an instrument panel.
5. The dual MCU automatic transmission control system with fast shift mode of claim 4, wherein: the speed signals comprise an engine rotating speed signal and a vehicle speed signal.
6. The dual MCU automatic transmission control system with fast shift mode of claim 1, wherein: the transmission analog signals include clutch position signals, shift position signals, and hand brake position signals.
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| CN202210302546.7A CN114688243B (en) | 2022-03-25 | 2022-03-25 | double-MCU automatic transmission control system with quick gear shifting mode |
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| JP2006347408A (en) * | 2005-06-17 | 2006-12-28 | Hitachi Ltd | System and method for controlling automobile, and automobile |
| JP2015117782A (en) * | 2013-12-19 | 2015-06-25 | 日産自動車株式会社 | Automatic transmission no-idling control device |
| CN206190878U (en) * | 2016-06-28 | 2017-05-24 | 泰州市海博汽车科技有限公司 | Multi -gear speed changer |
| CN112081913A (en) * | 2020-09-14 | 2020-12-15 | 中国一拖集团有限公司 | AMT transmission variable parameter gear shifting process control method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5078785B2 (en) * | 2008-07-09 | 2012-11-21 | 日野自動車株式会社 | Range type multi-stage transmission |
| CN102230531A (en) * | 2011-04-08 | 2011-11-02 | 浙江万里扬变速器股份有限公司 | Electronic control system of dual-clutch automatic transmission |
| CN113586704B (en) * | 2021-05-28 | 2022-07-12 | 武汉恒力华振科技有限公司 | Automatic gear shifting system of engineering mechanical pneumatic AMT gearbox and control method |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006347408A (en) * | 2005-06-17 | 2006-12-28 | Hitachi Ltd | System and method for controlling automobile, and automobile |
| JP2015117782A (en) * | 2013-12-19 | 2015-06-25 | 日産自動車株式会社 | Automatic transmission no-idling control device |
| CN206190878U (en) * | 2016-06-28 | 2017-05-24 | 泰州市海博汽车科技有限公司 | Multi -gear speed changer |
| CN112081913A (en) * | 2020-09-14 | 2020-12-15 | 中国一拖集团有限公司 | AMT transmission variable parameter gear shifting process control method |
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