Control method of automobile electric control parking and start assisting by manual transmission and system thereof

Abstract

The invention discloses a control method of automobile electric control parking and start assisting by manual transmission, and a system thereof. The control method comprises the following steps of: collecting signals by a signal collecting unit, receiving signals by an electronic control unit, carrying out analysis, judgment and decision-making, and driving a left-rear wheel direct current motor, a right-rear wheel direct current motor and three two-position two-way normally-opened electromagnetic valves to work. The system comprises the signal collecting unit, the electronic control unit, ahydraulic control unit and a parking implementing unit; the signal collecting unit comprises a sensor which can reflect the operating intention of the driver and real-time state of the automobile anda switch; the hydraulic control unit comprises three two-position two-way normally-opened electromagnetic valves and three one-way valves; and the parking implementing unit comprises a left-rear wheel electronic parking brake and a right-rear wheel electronic parking brake. The control method and the system thereof can realize the functions of electric control parking, start assisting, emergent braking and the like.

Description

technical field [0001] The invention relates to a control method and system for electronically controlled parking and auxiliary starting of a manually-variable automobile. Background technique [0002] At present, the parking of most manual transmission vehicles is realized by the driver pulling the parking brake handle to make the rear axle parking brake generate braking torque, thereby causing the road surface to generate braking force on the rear wheels. In this mode, the driver needs to operate the clutch pedal, accelerator pedal and parking brake handle at the same time to start the car on a slope; when parking for only a short time, such as waiting for a traffic light, many drivers often do not pull the parking brake. In this parking mode, the driver needs to operate the clutch pedal, accelerator pedal and brake pedal at the same time to make the car start on a slope. [0003] Manual cars using these two parking and starting methods have major defects. (1) The parking...

AI Technical Summary

Problems solved by technology

[0003] Manual cars using these two parking and starting methods have major defects. (1) The parking brake force will vary from person to person, which undoubtedly poses a great safety hazard to cars parked on slopes. (2) The parking brake handle occupies a large space in the cab, which is not conducive to the layout of other devices. (3) When the car is driving on a road with many traffic lights, the number of starts and stops is high, which requires the driver to frequently operate the clutch pedal, Accelerator pedal, parking brake handle or brake pedal are labor-intensive. (4) When starting, the timing of releasing the parking brake depends entirely on the driver's experience, especially on steep slopes. Drivers who do not have rich experience often It is difficult to start smoothly, which can easily cause the car to slip or stall

[0004] In order to solve the above-mentioned technical problems, German Lucas Automobile Co., Ltd. has successively disclosed "Method for Operating Vehicle Braking Device" (application number is 200580003615.9), "vehicle brakes, especially caliper brakes" (application number is 200680035641.4 ), our company has published "Actuating Mechanism of Vehicle Electronic Parking Brake System" (Application No. 200710156334.8) and "Electronic Control Unit of Vehicle Electronic Parking Brake System" (Application No. The proposed technical solution has a prerequisite for manual transmission vehicles - the target model must be equipped with an ESP device, otherwise the auxiliary start function cannot be realized

The reality is that only 7% of the vehicles in the Chinese auto market are equipped with ESP devices, and the core technology of ESP is still monopolized by foreign auto parts manufacturers. solution, because the electronic control unit that controls the actuator cannot effectively communicate with the ESP device, and the functions of electronically controlled parking and assisted start cannot be realized at the same time, so according to the existing technical solution, most users of manual transmission vehicles cannot use full The device that can overcome above-mentioned technical defect

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