EP 0445848 A3 19911218 - CONTROL SYSTEM FOR CONTROLLING DC CONTROL MOTOR WHICH CONTROLS OPERATION CONDITION OF INTERNAL COMBUSTION ENGINE

Title (en)

CONTROL SYSTEM FOR CONTROLLING DC CONTROL MOTOR WHICH CONTROLS OPERATION CONDITION OF INTERNAL COMBUSTION ENGINE

Publication

EP 0445848 A3 19911218 (EN)

Application

EP 91107702 A 19880301

Priority

EP 88301766 A 19880301
JP 4528787 A 19870302

Abstract (en)

[origin: EP0445848A2] A control system for controlling a DC control motor which controls an internal combustion engine to follow-up a target value varying continuously depending on the operation condition of the engine, the current flowing through the DC control motor being controlled through pulse width modulation. The control system comprises: means for detecting the operation condition of the engine; processor means for calculating and setting a target value depending on the operation condition of the engine; detector means for detecting the up-to-date value of the DC control motor; discriminator means for discriminating a difference between the target value and the up-to-date value to supply an output signal for changing the duty ratio of the current flowing through the DC control motor depending on the difference; a driver for energizing the DC control motor in response to the output signal from the discriminator means; and monitor means for controlling the changing rate of the up-to-date value and for increasing the duty ratio when the changing rate of the up-to-date value is less than a programmed rate. <IMAGE>

IPC 1-7

F02D 11/10; F02D 41/14; F02D 9/04

IPC 8 full level

F02D 41/14 (2006.01); F02D 9/04 (2006.01); F02D 11/10 (2006.01); F02D 35/00 (2006.01); F02D 41/00 (2006.01); F02D 41/20 (2006.01); F02D 41/22 (2006.01); F02D 45/00 (2006.01)

CPC (source: EP)

F02D 9/04 (2013.01); F02D 35/0007 (2013.01)

Citation (search report)

[Y] GB 2142168 A 19850109 - HONDA MOTOR CO LTD
[Y] US 4603675 A 19860805 - JUNGINGER ERICH [DE], et al
[A] US 4371822 A 19830201 - OTSUKA KAZUO [JP], et al
[A] GB 2175643 A 19861203 - ORBITAL ENG PTY
[A] PATENT ABSTRACTS OF JAPAN vol. 10, no. 77 (M-464)(2134) 26 March 1986 & JP-A-60 219 445 ( TOYOTA JIDOSHA K.K. ) 2 November 1985

Designated contracting state (EPC)

DE ES FR GB IT

DOCDB simple family (publication)

EP 0445848 A2 19910911; EP 0445848 A3 19911218; EP 0445848 B1 19941228; DE 3852653 D1 19950209; DE 3852653 T2 19950713; JP 2614443 B2 19970528; JP S63212752 A 19880905

DOCDB simple family (application)

EP 91107702 A 19880301; DE 3852653 T 19880301; JP 4528787 A 19870302