Method for venting of hydraulic brake system of vehicle and brake system controller

A brake system and hydraulic brake technology, applied in the direction of brake safety system, brake, pump/compressor arrangement, etc., can solve the problems of increasing the pedal operation stroke, interference, and unrealistic necessary steps, so as to reduce residual gas volume effect

Active Publication Date: 2014-06-04
FORD GLOBAL TECH LLC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Air bubbles remaining in the system are compressed when the brake pressure increases, leading to an elastic behavior of the brake transmission path and thus to an increased pedal actuation travel, which is perceived by the driver as a nuisance and in extreme cases constitutes Security Risk
[0003] For various reasons, a perfect air-free filling of the brake system cannot always be guaranteed, especially during the first filling of the brake system with hydraulic fluid during vehicle production
Even if the safety-critical threshold is not exceeded, this will lead to abnormally long ped

Method used

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  • Method for venting of hydraulic brake system of vehicle and brake system controller
  • Method for venting of hydraulic brake system of vehicle and brake system controller
  • Method for venting of hydraulic brake system of vehicle and brake system controller

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Embodiment Construction

[0029] figure 1 Schematic showing the hydraulic braking system (service brakes) of a car with ABS and ESC. The braking system described is shown as an example only; the invention can be used in many different braking system configurations. According to legal regulations, two mutually independent brake circuits are provided, each brake circuit providing, in the exemplary embodiment, diagonally opposite brakes 18a to 18d in an X-shaped configuration. On the one hand, the brakes can be actuated using the brake pedal 10 , which, in a known manner, applies brake pressure to the two brake circuits independently of one another via the brake booster and the tandem master cylinder. figure 1 Lines thus affected by pressure are highlighted with thicker lines. The resulting pressure is indicated by a symbolic pressure gauge 20 and, in the case of the unit in question with "ESP", also measured by a pressure sensor (pressure / voltage converter).

[0030] In order to perform the ABS functi...

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Abstract

The invention provides a method for exhaust of at least one part of a hydraulic brake system of a vehicle. The brake system comprises at least one brake circuit. The pressure of the brake circuit can be selectively increased through at least one motor propelled pump (14a,14b), especially an ESC pump. Under the condition that an exhaust valve is not opened, a given period for increased pressure can be applied to the partial brake system for exhaust through the pump (14a,14b).

Description

technical field [0001] The present invention relates to a method and a brake system controller for venting at least a portion of a hydraulic brake system of a vehicle, wherein the brake system comprises at least one brake circuit via at least one electric motor driven pump device, the brake circuit Pressure can be selectively increased. Background technique [0002] Proper venting of hydraulic braking systems used in vehicles, especially automobiles, is known to be very important. Air bubbles remaining in the system are compressed when the brake pressure increases, leading to an elastic behavior of the brake transmission path and thus to an increased pedal actuation travel, which is perceived by the driver as a nuisance and in extreme cases constitutes Security Risk. [0003] For various reasons, a perfect gas-free filling of the brake system cannot always be guaranteed, especially during the first filling of the brake system with hydraulic fluid during vehicle production....

Claims

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Application Information

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IPC IPC(8): B60T17/02
CPCB60T13/66B60T17/20
Inventor 金姆·史蒂芬·琼斯克莱夫·约翰·巴顿路德维格·费恩
Owner FORD GLOBAL TECH LLC
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