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Electronically controlled throttle system

An electronic control, throttle valve technology, applied in electrical control, engine control, fuel injection control, etc., can solve the problems of increased contact resistance between printed resistors and brushes, output changes, abnormal throttle opening sensors, etc. drastically changing effects

Active Publication Date: 2015-06-03
HITACHI ASTEMO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in such a throttle opening sensor composed of a potentiometer, due to friction powder and scratches generated by the sliding of the printed resistor and the brush, the printed resistor and the brush may be interrupted momentarily, or the printing may be interrupted. The contact resistance between the resistor body and the brush increases, resulting in a noisy output change, and sometimes it is determined that the throttle opening sensor is abnormal

Method used

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  • Electronically controlled throttle system
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Embodiment Construction

[0019] Hereinafter, the electronically controlled throttle system in the embodiment of the present invention will be described in detail with appropriate reference to the drawings.

[0020] [Structure of electronically controlled throttle system]

[0021] First, refer to figure 1 The configuration of a vehicle electronic control device to which the electronically controlled throttle system according to the embodiment of the present invention is applied will be described in detail.

[0022] figure 1 It is a block diagram showing the configuration of a vehicle electronic control device to which the electronically controlled throttle system in this embodiment is applied.

[0023] Such as figure 1 As shown, the vehicle electronic control device 1 to which the electronic control throttle system ("DBW: Drive By Wire (drive by wire)" system) in this embodiment is applied is mounted on a vehicle such as a motorcycle. The device 1 is an arithmetic processing device such as a microc...

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Abstract

Disclosed is an electronically controlled throttle system. In the electronically controlled throttle system (S), a throttle valve openness sensor selection unit (8) calculates a first variation between target throttle valve openness and the actual throttle valve openness detected by a first throttle valve openness sensor (26a); then calculates a second variation between the target throttle valve openness and the actual throttle valve openness detected by a second throttle valve openness sensor (26b); when at least one of the first variation and the second variation is above a first determined value (a), according to the greatness of the absolute values of the first variation and the second variation, selects the output of one of the throttle valve openness sensors (26a, 26b).

Description

technical field [0001] The present invention relates to an electronically controlled throttle system, in particular to an electronically controlled throttle system that performs feedback control so that the opening of the throttle is consistent with the target opening of the throttle. Background technique [0002] In recent years, an electronically controlled throttle system has been proposed that feedback-controls a motor that drives the throttle so that the throttle opening detected by the throttle opening sensor (actual throttle opening) It is consistent with the target throttle opening, and the target throttle opening corresponds to the indicated throttle opening detected by the throttle sensor. [0003] In such an electronically controlled throttle system, as a throttle opening sensor composed of two systems, each system has a device composed of a potentiometer configured to be activated by sliding a brush on a printed resistor. change the resistance value. In the ele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/22
CPCF02D9/02F02D11/107F02D41/0002F02D41/221F02D2011/102F02D2041/227F02D2200/0404F02D2400/08Y02T10/40
Inventor 杉森滋彦
Owner HITACHI ASTEMO LTD
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