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Equivalent circuit for activation of an electric vacuum pump in case of control unit failure

A technology of electric vacuum pump and backup circuit, which is applied in the direction of brakes, brake safety systems, brake transmissions, etc., and can solve problems such as troubles and discomfort

Active Publication Date: 2012-12-12
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even if the legal regulations on deceleration are guaranteed, the operating force of the braking device due to the failure of the vacuum pump at least makes the driver feel uncomfortable and can also cause annoyance

Method used

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  • Equivalent circuit for activation of an electric vacuum pump in case of control unit failure
  • Equivalent circuit for activation of an electric vacuum pump in case of control unit failure
  • Equivalent circuit for activation of an electric vacuum pump in case of control unit failure

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Embodiment Construction

[0028] figure 1 A functional diagram of the backup circuit 100 according to the invention is shown when the main control device 140 is functionally ready.

[0029] The backup circuit 100 for activating the electric vacuum pump 200 in the braking force amplification device 300 has a first signal input terminal 110 for inputting a brake operation signal 111 and a reference signal 121 for inputting a main control device 140 of the electric vacuum pump. The second signal input terminal 120 . Among them, for example, an ESP controller can be used as the main control device 140 . Furthermore, the standby circuit has a signal output 130 for triggering the electric vacuum pump 200 . First signal input 110 and signal output 130 are connected to each other in such a way that a signal 131 for activating electric vacuum pump 200 is output at signal output 130 when a signal 111 representing a brake operation is input to first signal input 110 . The second signal input 120 and the signal...

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Abstract

The present invention relates to a brake booster system in motor vehicles. It is an equivalent circuit (100) for activation of an electric vacuum pump (200) is proposed in a booster unit (300) comprising a first signal input (110) for supplying a signal representative of a brake actuation signal (111), a second signal input (120) for feeding a reference signal (121) from an ESP control unit (140) and a signal output (130) for driving the electric vacuum pump (200), wherein the first signal input (110) and the signal output (130) are so interconnected with each other, that upon receipt of one of a brake actuation signal representative (111) at the first signal input (110) is an electric vacuum pump (200) is an activating signal (131) is outputted to the signal output (130), wherein the second signal input (120) to the signal output (130) connected so that an output of an activating electrical vacuum pump signal (131) is suppressed in the signal output (130), providing the operational readiness of the ESP control device (140) representing reference signal (121) applied to the second signal input.

Description

technical field [0001] The invention relates to a brake force amplifying device in an automobile. In particular, the invention relates to a backup circuit for activating an electric vacuum pump in the event of a controller failure. Background technique [0002] In modern vehicles, the driver is supported by the brake booster (BKV) during braking. The actuating force required to brake the vehicle is reduced by means of the BKV. The auxiliary force provided by the BKV for this purpose is generated by means of the pressure difference between the atmospheric pressure and the low pressure present in the interior of the BKV in the case of low-pressure BKVs usually used in motor vehicles. [0003] Even with a BKV connected in between, the brake pedal acts directly on the master brake cylinder like the brake pedal in conventional brake systems without amplifiers. The master brake cylinder injects the brake fluid used for transmitting the braking force into the pipeline system for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60T13/74B60T17/22
CPCB60T13/662B60T13/52B60T17/02
Inventor M.孔茨T.布吕克斯
Owner ROBERT BOSCH GMBH
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