Relay valve, braking system and braking method for electric vehicle
A technology for electric vehicles and braking systems, which is applied to electric braking systems, electric vehicles, brake transmission devices, etc., can solve the problems of inability to meet energy saving, complex control methods, wheel locking, etc., and achieve rapid braking response. Precise control, reduced engagement effects
Active Publication Date: 2019-08-27
WEICHAI POWER CO LTD
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Problems solved by technology
Although this method is safe and secure, but without motor braking feedback, almost all the kinetic energy of the vehicle is converted into heat and lost, which cannot meet the requirements of energy saving.
2. In order to improve the energy-saving effect of the system, the motor feedback and the ABS braking system work at the same time during the emergency braking of the vehicle. The control method is complicated, and the wheels are prone to lock, which affects the safety of the vehicle braking
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[0031] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.
[0032] figure 1 It is a schematic structural diagram of a relay valve 10 according to an embodiment of the present invention. As shown in the figure, the relay valve 10 includes an intake valve 11 and a guide rod 12 located below the intake valve 11. A spring 13 is sleeved on the guide rod 12, and a spring pretensioning device is connected to the lower end of the guide rod 12. When the braking torque of the motor system of the ele...
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The invention belongs to the technical field of electric vehicle control, and especially relates to a relay valve, braking system and braking method for an electric vehicle. The relay valve for the electric vehicle comprises an intake valve and a guide rod arranged below the intake valve. A spring sleeves the guide rod. The lower end of the guide rod is connected with a spring pretensioning device. The spring pretensioning device is capable of pretensioning the spring when the braking torque of a motor system of the electric vehicle can meet the braking demand torque of the electric vehicle, an opening of the intake valve is reduced until closed, and thus a pneumatic braking system of the electric vehicle is closed. By using the relay valve, braking system and braking method for the electric vehicle, switching between the pneumatic braking system and a motor braking system of the vehicle can be completed quickly, a quick braking response can be made, and the control is accurate.
Description
technical field [0001] The invention belongs to the technical field of electric vehicle control, and in particular relates to a relay valve, a braking system and a braking method for electric vehicles. Background technique [0002] In pure electric vehicles and gasoline-electric hybrid vehicles, in order to improve the energy utilization rate, the motor generates braking force when the vehicle brakes, and the braking energy is recovered to improve the energy utilization rate. Since there are two sets of systems with braking functions, there will be coordination problems between the motor feedback braking and the ABS braking system on the vehicle. If the coordination is not good, the wheels of the vehicle will be locked, resulting in safety problems. [0003] The existing control methods mainly have the following two problems: [0004] 1. For braking safety, when the vehicle is under emergency braking, the motor feedback braking is completely withdrawn, and the braking of th...
Claims
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IPC IPC(8): B60T15/02B60T13/24B60L7/10
Inventor 贾艳艳桂经良田莹李志杰
Owner WEICHAI POWER CO LTD