A throttle valve control system for an engine of a vehicle

(19)

(11)

EP 0 495 295 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	04.08.1993 Bulletin 1993/31

(43)	Date of publication A2:
	22.07.1992 Bulletin 1992/30

(21)	Application number: 91310734.8

(22)	Date of filing: 21.11.1991

(51)	International Patent Classification (IPC)⁵: F02D 11/10, F02D 35/00

(84)	Designated Contracting States:
	DE ES FR GB IT

(30)

Priority:

12.01.1991 GB 9100685

(71)	Applicant: ROVER GROUP LIMITED
	Bickenhill Birmingham B37 7HQ (GB)

(72)	Inventor:
	Talbot, Kevin Trevor Lichfield, Staffs WS13 7JJ (GB)

(74)	Representative: Burrage, David John et al
	Rover Group Limited Patent Department Gaydon Test Centre Banbury Road Lighthorne, Warwick CV35 OBL Lighthorne, Warwick CV35 OBL (GB)

(56)

References cited: :

(54)	A throttle valve control system for an engine of a vehicle

(57) A throttle valve control system for an engine of a vehicle is disclosed of the type having a rotatable throttle valve controlled by an electronic control means. The control means (21) being operable to increase the effort supplied to the throttle valve (14) when the throttle valve (14) approaches its closed position in order to reduce the effect of stiction and friction on the control system response. The increase in effort is obtained by increasing momentarily the system gain or providing a step input of predetermined magnitude.

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