Electro-hydraulic control type braking power assisting device
A technology of brake booster and electro-hydraulic control, which is applied in the field of brake booster of automobile service brake system, which can solve the problems of difficult layout of automobile engine compartment, increase of automobile noise, consumption of engine power, etc., and achieve good pedal operation performance Effect
Active Publication Date: 2015-07-15
JIANGSU FEILU HEAVY MACHINERY MFG CO LTD
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[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0024] Such as figure 1 As shown, an electro-hydraulic control brake booster device is composed of a mechanical power transmission system, a hydraulic power booster system and an electronic control system. The mechanical power transmission system directly transmits the driver's pedal force to the brake master cylinder. As the working medium, the oil transmits the power of the electric motor in the electronic control system to the brake master cylinder for boosting. Mechanical force transmission system comprises pedal push rod 9, push rod spring 10, piston push rod 7. The hydraulic booster system includes a booster worm 18, a booster turbine 20, a first radial ball bearing 17 and a second radial ball bearing 21, a booster screw 22, a booster piston 24, a booster chamber spring 25, a booster chamber rear housing 16, and a booster chamber Front ...
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The invention provides an electro-hydraulic control type braking power assisting device and relates to automobile running braking systems. The device transmits a braking pedal force to a braking main cylinder piston through a pedal push rod, a push rod spring and a piston push rod; a pressure sensor is arranged on the pedal push rod and a linear displacement sensor is arranged between the pedal push rod and the piston push rod so as to sense the speed of stepping on a braking pedal and a relative position between the pedal push rod and the piston push rod; a motor is controlled to drive a turbine and worm mechanism after the stepping speed and the relative position are processed by an electronic control unit; a pushing power assisting piston is driven by a power assisting screw rod so as to transmit hydraulic oil to a power application hydraulic cavity through an electromagnetic valve; and the hydraulic oil is loaded to the braking main cylinder piston for providing assisting power. When the braking pedal stops, the motor stops running and the device keeps a braking force on the basis of a self-locking function of screw threads; and when the braking pedal is released, the motor runs reversely and the hydraulic oil flows back to an assisting power hydraulic cavity to realize braking release. The electro-hydraulic control type braking assisting power device ensures the foot feeling during braking by keeping a compressed length of the push rod spring; therefore, a power remarkable and soft assisting effect is achieved.
Description
technical field [0001] The invention relates to an automobile electro-hydraulic control product, in particular to a brake booster device of an automobile service brake system, especially suitable for pure electric vehicles and hybrid vehicles. Background technique [0002] At present, the driving braking system of a car usually adopts a servo braking system, which is formed by adding a set of power servo system on the basis of the human hydraulic braking system. During normal braking, most of the braking energy is supplied by the power servo system. It reduces the braking force applied to the brake pedal by the driver when braking. When the power servo system fails, the driver provides all the braking energy to meet the needs of the vehicle braking. Cars mainly use vacuum servo and air pressure servo brake systems to provide brake assist. [0003] The vacuum booster servo brake system provides boost by installing a vacuum booster between the brake pedal push rod and the br...
Claims
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IPC IPC(8): B60T13/68B60T7/06B60T13/12B60T13/14
Inventor 赵迎生
Owner JIANGSU FEILU HEAVY MACHINERY MFG CO LTD