A hill start assist system and method for an automatic transmission

Abstract

The invention discloses a staring auxiliary system and method of an automatic gearbox ramp. The staring auxiliary system comprises an automatic gearbox control unit, a braking air chamber, a braking pedal, a vehicle air cylinder, a two-position two-way solenoid valve, a check valve, a first pressure switch, a second pressure switch and a tilt angle sensor; the two-position two-way solenoid valve, the check valve, the first pressure switch, the second pressure switch and the tilt angle sensor are electrically connected with the automatic gearbox control unit; the vehicle air cylinder is used for providing a braking air source for the braking air chamber; the braking pedal is used for controlling unblocking and blocking of a channel formed between the vehicle air cylinder and the braking air chamber; the two-position two-way solenoid valve is arranged on an air pressure pipeline which is arranged between the braking air chamber and the braking pedal; the two pressure switches are arranged between the braking air chamber and the two-position two-way solenoid valve and between the two-position two-way solenoid valve and the braking pedal respectively; the check valve is in air circuit parallel connection with the two-position two-way solenoid valve; the tilt angle sensor is independently arranged on a vehicle body or at the chassis bottom of an automobile; the two pressure switches are used for sending out the same signal when the braking pedal brakes and also used for sending out different signals when the braking pedal resets.

Description

technical field

[0001] The invention belongs to the field of commercial vehicle automatic transmissions, and in particular relates to a novel automatic transmission ramp start assist system. Background technique

[0002] Today's commercial vehicles are equipped with an obvious trend of automatic transmission systems. The original intention is to reduce the labor intensity of the driver driving the vehicle, reduce the difficulty of the driver's operation of the vehicle, and improve the comfort and safety of the vehicle. However, the application of traditional automatic transmissions in special environments is stretched, especially following cars on hills in cities.

[0003] On ordinary commercial vehicles with manual transmission, experienced drivers often control the vehicle to start on a hill through the accelerator, brake, parking brake, and clutch. The slipping and grinding of the clutch is very difficult. Improper application will not only cause the vehicle to slide dow...

Examples

Embodiment Construction

[0017] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0018] see figure 1 , which is a structural schematic diagram of an automatic transmission hill start assist system provided in a preferred embodiment of the present invention.

[0019] The hill start assist system of the automatic transmission includes an automatic transmission control unit (Transmission Control Unit, TCU) 1, a brake chamber 2, a brake pedal 8, a vehicle air storage tank 9, a two-position two-way solenoid valve 5, and a one-way valve. 4. The first pressure switch 3, the second pressure switch 6, and the inclination sensor 7.

[0020] The vehicle air storage tank 9 is used to pro...

technical field

[0001] The invention belongs to the field of commercial vehicle automatic transmissions, and in particular relates to a novel automatic transmission ramp start assist system. Background technique

[0002] Today's commercial vehicles are equipped with an obvious trend of automatic transmission systems. The original intention is to reduce the labor intensity of the driver driving the vehicle, reduce the difficulty of the driver's operation of the vehicle, and improve the comfort and safety of the vehicle. However, the application of traditional automatic transmissions in special environments is stretched, especially following cars on hills in cities.

[0003] On ordinary commercial vehicles with manual transmission, experienced drivers often control the vehicle to start on a hill through the accelerator, brake, parking brake, and clutch. The slipping and grinding of the clutch is very difficult. Improper application will not only cause the vehicle to slide dow...

Examples

Embodiment Construction

[0017] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0018] see figure 1 , which is a structural schematic diagram of an automatic transmission hill start assist system provided in a preferred embodiment of the present invention.

[0019] The hill start assist system of the automatic transmission includes an automatic transmission control unit (Transmission Control Unit, TCU) 1, a brake chamber 2, a brake pedal 8, a vehicle air storage tank 9, a two-position two-way solenoid valve 5, and a one-way valve. 4. The first pressure switch 3, the second pressure switch 6, and the inclination sensor 7.

[0020] The vehicle air storage tank 9 is used to pro...

Images