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Vehicle brake system and method of detecting piston location of a plunger assembly

A vehicle braking and piston technology, which is applied to vehicle components, brakes, brake transmissions, etc., and can solve problems such as insignificant compounding

Active Publication Date: 2020-09-11
ZF主动安全美国股份公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Preferably hydraulic braking operates in a regenerative braking compounding manner such that compounding is effectively and insignificantly effected with electromagnetic braking left off

Method used

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  • Vehicle brake system and method of detecting piston location of a plunger assembly
  • Vehicle brake system and method of detecting piston location of a plunger assembly
  • Vehicle brake system and method of detecting piston location of a plunger assembly

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Embodiment Construction

[0024] Referring now to the accompanying drawings, figure 1 A first embodiment of a vehicle braking system, indicated generally at 10, is schematically illustrated. The braking system 10 is a hydraulic braking system in which fluid pressure from a source is operated to apply a braking force to the braking system 10 . Braking system 10 may suitably be used on a ground vehicle, such as a motor vehicle having four wheels. Additionally, the braking system 10 may be provided with other braking functions, such as anti-lock braking (ABS) and other anti-skid control features, to effectively brake the vehicle, as will be discussed below. In the illustrated embodiment of the braking system 10, there are four wheel brakes 12a, 12b, 12c and 12d. The wheel brakes 12a, 12b, 12c and 12d may be of any suitable wheel braking configuration operated by application of pressurized brake fluid. Wheel brakes 12a, 12b, 12c, and 12d may, for example, include brake calipers mounted on the vehicle to...

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PUM

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Abstract

A method of determining a homing position of a piston within a plunger assembly for a vehicle brake system at the beginning of an ignition cycle of the vehicle includes first providing a plunger assembly having a housing defining a bore therein. The plunger assembly includes a piston slidably disposed in the bore for pressurizing fluid within a pressure chamber when the piston is moved in a firstdirection. The plunger assembly further includes an electrically operated linear actuator for moving the piston within the bore. The method further includes providing electrical power to the linear actuator of the plunger assembly. The linear actuator is actuated to retract the piston in a second direction opposite the first direction towards an end stop. The piston engaging with the end stop is then detected.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of U.S. Provisional Application No. 62 / 612,489, filed December 31, 2017, and U.S. Provisional Application No. 62 / 612,490, filed December 31, 2017, the disclosures of which are incorporated herein by reference . Background technique [0003] The present invention relates generally to vehicle braking systems. Vehicles typically use hydraulic braking systems to slow and stop. These systems vary in complexity, but a basic braking system typically includes a brake pedal, a tandem master cylinder, fluid conduits arranged in two similar but separate brake circuits, and a wheel in each circuit brakes. A driver of the vehicle operates a brake pedal connected to the master cylinder. When the brake pedal is depressed, the master cylinder generates hydraulic pressure in both brake circuits by pressurizing the brake fluid. Pressurized fluid travels through fluid conduits in both circuits to ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60T13/74B60T8/171B60T13/22B60T13/14F16H25/22
CPCB60T7/042B60T13/745B60T13/146B60T13/662B60T13/686F16H2025/2078F16H25/2204B60Y2400/81
Inventor W·张P·哈特曼W·孔
Owner ZF主动安全美国股份公司