A Brake Control Mechanism for Electric Vehicles with Integrated Power Assist Function
A brake control and booster mechanism technology, applied in brakes, brake transmissions, vehicle components, etc., can solve problems such as poor controllability of braking force, low system integration, and high noise of vacuum pumps, and increase the pressure adjustment range , simple interface and complete functions
Active Publication Date: 2018-09-21
CHINA FIRST AUTOMOBILE
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Problems solved by technology
Although this type of solution solves the application problems of the traditional vacuum booster braking system on electric vehicles, it brings new problems such as high noise of the vacuum pump and low system integration.
At the same time, due to the use of traditional vacuum booster operating mechanisms in this type of system, the controllability of the braking force of the system is poor and the response speed is slow.
Method used
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Embodiment Construction
[0050] The present invention is described in detail below in conjunction with accompanying drawing:
[0051] The electric vehicle brake control mechanism with integrated power assist function is composed of a new power boost mechanism and an integrated brake master cylinder.
[0052] The novel booster mechanism includes a motor 102 , a drive gear 103 , a reduction gear 101 , a booster piston 104 , a decompression cutoff solenoid valve 107 , an oil return cutoff solenoid valve 108 , a booster cutoff solenoid valve 110 and a booster mechanism housing 105 .
[0053] The integrated brake master cylinder includes a brake pedal 220, a pedal angular displacement sensor 218, a master cylinder housing 205, a first piston 210, a first piston return spring 208, a second piston 212, and a second piston return spring 208. Spring 228, failure backup piston 217, failure backup piston return spring 216, master cylinder push rod 219, booster chamber oil return solenoid valve 221, failure backu...
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The invention discloses a braking operating mechanism used for an electric vehicle and integrating the power assisting function. The braking operating mechanism is composed of a novel power assisting mechanism and an integrated main braking cylinder. The novel power assisting mechanism comprises a motor, a driving gear, a deceleration gear, a power assisting piston, a pressure reduction cut-off electromagnetic valve, an oil return cut-off electromagnetic valve, a pressure boosting cut-off electromagnetic valve, a liquid storage cup and a power assisting mechanism shell. The integrated main braking cylinder comprises a braking pedal, a pedal angular displacement sensor, a main cylinder shell, a first piston, a second piston, a failure backup piston, a main cylinder push rod, a pressure boosting cavity oil return electromagnetic valve, a failure backup cavity cut-off electromagnetic valve and a pedal stroke simulator cut-off valve. By the adoption of the braking operating mechanism with the power assisting function, an electric vacuum power assisting braking operating mechanism widely used on existing electric vehicles is replaced. The braking operating mechanism has the beneficial effects that a response is made rapidly, controllability is good, the work effect of a braking energy recycling system can be improved, and the economical efficiency and safety of the electric vehicle can be improved.
Description
technical field [0001] The invention belongs to the technical field of automobile brake systems, and relates to a control device applied to the brake system of an electric vehicle. More precisely, the invention relates to a brake control mechanism for an electric vehicle with an integrated power assist function. Background technique [0002] The traditional servo braking system uses the engine's intake negative pressure as power to apply boost to the hydraulic braking system in order to obtain sufficient braking force. This type of system is called a vacuum boosting braking system. Before the emergence of new energy vehicles, vacuum booster braking systems were widely used in traditional vehicles. However, in electric vehicles, the engine will not continue to work (such as a hybrid vehicle with engine start-stop function), and even the engine is completely replaced by an electric motor (pure electric vehicle), which causes the negative pressure of the intake air to not alway...
Claims
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IPC IPC(8): B60T13/14B60T13/68
CPCB60T13/14B60T13/68
Inventor 张永生刘明辉魏文若赵子亮杨兴旺姚亮
Owner CHINA FIRST AUTOMOBILE