Single-pedal speed control system of electric vehicle

Abstract

The invention provides a single-pedal speed control system of an electric vehicle. The single-pedal speed control system comprises a speed control pedal, a pedal position sensor, a speed controller, a brake valve and a return spring. The single-pedal speed control system has the advantages that starting, accelerating, decelerating and braking of the electric vehicle can be controlled by the speed control system according to the position of the pedal and current states of a motor, braking releasing, motor power-on, motor accelerating and motor power-off procedures are sequentially carried out when the pedal is released, motor rotation speed reducing, motor power-off and braking procedures are sequentially carried out when the pedal is treaded, and accordingly different deceleration requirements can be met; starting, motor rotation speed regulating and state switching can be automatically completed by the aid of the controller according to operation on the pedal, and accordingly the driving convenience and safety can be improved; problems of high operational complexity and easiness in causing misoperation due to the fact that an existing acceleration pedal and an existing brake pedal are separately arranged can be solved by the aid of the single-pedal speed control system.

Description

Technical field [0001] The invention belongs to the technical field of electric vehicles, and in particular relates to a control system that uses only one pedal to control the operations of starting, accelerating, driving at a constant speed, decelerating and braking of an electric vehicle. technical background [0002] At present, the speed control of electric vehicles mostly adopts a driving method similar to traditional cars, and the speed of electric vehicles is controlled by devices such as accelerator pedal and brake pedal. This kind of electric vehicle with dual pedals mainly has the following two problems: [0003] First, the operation complexity is high. Driving this kind of electric vehicle needs to be familiar with the accelerator pedal and the brake pedal at the same time, and learning to drive this kind of electric vehicle requires a long process, which is not conducive to quickly mastering driving skills. [0004] Second, it is easy to cause misoperation. Since the f...

AI Technical Summary

Problems solved by technology

[0003] First, the operation complexity is high

Driving this kind of electric vehicle needs to be familiar with the accelerator pedal and brake pedal at the same time. Learning to drive this kind of electric vehicle requires a long process, which is not conducive to quickly mastering driving skills

[0004] Second, it is easy to cause misuse

The problem with this solution is that the driver cannot perform emergency braking by increasing the pedaling force. On the contrary, when the pedal is released for braking, due to the inertia, the foot will naturally increase the pedaling force. At this time, it will enter the acceleration state instead, reducing the driving safety

Patent 02114368.4 adopts the method of binding the feet. The foot is pulled to control the accelerator, and the foot is stepped to control the brake. The operation is more complicated, and the long-term pulling state increases the fatigue of the driver and reduces the safety of driving.

Patent 97192004.4 also uses a purely mechanical control method, which requires a combination of multiple pedals to complete the operation, which increases the complexity of the operation

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