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Motorized power assisting device

An electric power-assisted and electric technology, which is applied in the direction of brake transmission device, brake action activation device, fluid pressure actuation device, etc., can solve the problem of not detecting the absolute displacement of the input part, and the relative displacement relationship between the input part and the power-assisted part. Variable control, no consideration of detecting the relative displacement of two parts, etc.

Active Publication Date: 2011-09-07
HITACHI ASTEMO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Although the device disclosed in Patent Document 3 can make the relative displacement of the input part and the power-assisted part, it does not consider detecting the relative displacement of the two parts at all. Therefore, the relative displacement relationship between the input part and the power-assisted part cannot be variably controlled.
The device disclosed in Patent Document 3 does not detect the absolute displacement of the input member, and does not include a technology for freely controlling the displacement of the relative displacement relationship between the two components based on the absolute displacement.

Method used

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  • Motorized power assisting device
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no. 3 example

[0202] The main difference of the electric power booster 50C of the third embodiment is that the controller 92 (I) of the first embodiment uses the detection data (II) of the relative displacement sensor 100 in the feedback control to set the target displacement C, with the use of memory 101 pre-stored Figure 4 ~ Figure 10 The characteristic data in each column (b) are opposite, and instead of the controller 92, a controller 92C is provided, and this controller 92C (Ic) uses the detection data (assist absolute displacement detection value D) of the resolver 91 in the feedback control (IIc) In the setting of the target displacement C, use the memory 101 stored in advance Figure 4 ~ Figure 10 Characteristic data for each column (a).

[0203] exist Figure 25 Among them, the controller 92C makes the relative displacement relationship between the input piston 58 and the booster piston 52 variable according to the detection signal of the potentiometer 86, and takes the absolute...

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Abstract

The present invention provides a motorized power assisting device capable of delivering various desired brake characteristics and improving brake feeling by controlling displacement according to the absolute displacement of an input member so as to make variable the relative displacement relations between the input member and an assist member. A target displacement that makes variable the relative displacement relations between an input piston and a booster piston is set according to a detection signal by a potentiometer (86) (an input absolute displacement detecting means), and a displacement is controlled based on a signal from a relative displacement sensor (100) that detects the relative displacement between the both pistons so that the relative displacement between the both pistons agrees with the target displacement. Controlling the relative displacement between the input piston and the booster piston in this way can deliver various brake characteristics such as brake assist control.

Description

technical field [0001] The invention relates to an electric power booster used in a brake mechanism of an automobile and the like. Background technique [0002] Conventionally, there is an electric power booster that uses an electric driver to boost a pedal input and output it to a master cylinder. Examples of such electric boosters include those disclosed in Patent Documents 1 to 3. [0003] The electric power booster disclosed in Patent Document 1 includes a power booster (electromagnetic device) provided to boost the transmission force generated by the input rod to the master cylinder, and a relative displacement sensor that detects the relative displacement between the input rod and the power booster. , to control the displacement of the power-assisted component so that the input rod and the power-assisted component are displaced integrally, that is, to make the relative displacement detected by the relative displacement sensor be zero. [0004] The electric power boos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60T13/74B60T8/00B60T8/17
CPCB60T7/042B60T13/02B60T2220/04B60T13/745B60T8/3275F15B15/20B60T2270/604
Inventor 大谷行雄池田纯一长井和裕
Owner HITACHI ASTEMO LTD