Title:
ELECTRONIC CONTROL THROTTLE DEVICE AND THROTTLE CONTROL METHOD
Document Type and Number:
Japanese Patent JP2017106387
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To realize an electronic control throttle device not giving bad influence on startability of an internal combustion engine by early executing diagnoses of both of a power source cut-off device of an actuator and a return spring just before start of the internal combustion engine.SOLUTION: A diagnosis is started simultaneously with key-on to keep a throttle valve opening to a target throttle valve opening 1 at an opening side with respect to a default opening, and when a prescribed time 1 has passed in waiting the target valve opening 1 (steps 401-403), abnormality of a throttle power source relay is determined and a mode is transferred to a fail-safe mode (step 411). When the opening reaches the target valve opening 1 in step 402, the throttle power source relay is cut off, and when the throttle valve is closed within a prescribed time 2 in waiting the opening of the throttle valve opening to reach the prescribed opening or less within the prescribed time 2 (steps 404-406), the throttle power source relay is re-connected, a throttle power source relay normal flag is set, and a return spring normal flag is set (steps 407-409).SELECTED DRAWING: Figure 4
Inventors:
ISHIKAWA HIROTO
HORIUCHI SADATO
HORIUCHI SADATO
Application Number:
JP2015241038A
Publication Date:
June 15, 2017
Filing Date:
December 10, 2015
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD
International Classes:
F02D11/10; F02D9/02
Domestic Patent References:
| JP2003214193A | 2003-07-30 | |||
| JPH07139408A | 1995-05-30 | |||
| JP2013177848A | 2013-09-09 | |||
| JP2011007115A | 2011-01-13 |
Attorney, Agent or Firm:
Kaichi International Patent Office