Title:
車載用電子制御装置
Document Type and Number:
Japanese Patent JP3596433
Kind Code:
B2
Abstract:
In an ECU for vehicles, a microcomputer operates with a main power from a battery, and a clock IC operates with sub power from the battery and measures time continuously irrespective of whether the microcomputer is operating. The microcomputer stores time data of the clock IC just before the supply of main power is turned off, and calculates a soak time or engine stop period from the stored time data and a current time data of the clock IC only after the supply of main power is turned on again and engine cranking is completed. This soak time represents the engine stop period. Operation of a cooling water temperature sensor or the like is checked by using the sensor output in relation to the calculated soak time.
Inventors:
Yu Amano
Atsushi Sugimura
Atsushi Sugimura
Application Number:
JP2000195867A
Publication Date:
December 02, 2004
Filing Date:
June 29, 2000
Export Citation:
Assignee:
株式会社デンソー
International Classes:
F02D41/04; F02D41/22; F02D41/24; F02D45/00; F02N11/08; G04F10/00; G04G99/00; G07C5/08; (IPC1-7): F02D45/00
Domestic Patent References:
| JP2000337208A | ||||
| JP11182307A | ||||
| JP6146956A | ||||
| JP4292545A | ||||
| JP6229284A | ||||
| JP6257481A | ||||
| JP3172555A | ||||
| JP41450A |
Attorney, Agent or Firm:
Hironobu Onda
Makoto Onda
Makoto Onda