Exhaust pulsation control system for an internal combustion engine

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(11)

EP 0 735 257 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	20.08.1997 Bulletin 1997/34

(43)	Date of publication A2:
	02.10.1996 Bulletin 1996/40

(21)	Application number: 96105198.4

(22)	Date of filing: 01.04.1996

(51)	International Patent Classification (IPC)⁶: F02D 41/14

(84)	Designated Contracting States:
	DE FR GB IT

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Priority:

31.03.1995 JP 100152/95

(71)	Applicant: YAMAHA HATSUDOKI KABUSHIKI KAISHA
	Iwata-shi Shizuoka-ken, 438 (JP)

(72)	Inventors:
	Motoyama, Yu Iwata-shi, Shizuoka-ken (JP) Moriya, Yoshihiko Iwata-shi, Shizuoka-ken (JP)

(74)	Representative: Grünecker, August, Dipl.-Ing.
	Patentanwälte Grünecker, Kinkeldey, Stockmair & Partner Maximilianstrasse 58 80538 München 80538 München (DE)

(54)	Exhaust pulsation control system for an internal combustion engine

(57) An exhaust pulsation control system for an internal combustion engine having at least one cylinder communicating with an intake passage via an intake port and with an exhaust passage via an exhaust port, comprises engine operating condition detecting means and exhaust gas temperature detecting means. Further, there is provided a memory storing target values of exhaust gas temperature related to predetermined engine operating conditions and a control means connected to said memory and adapted to control an air/fuel ratio of an air/fuel mixture to be supplied to said engine so as to approach said detected exhaust gas temperature to said target exhaust gas temperature corresponding to the engine operating conditions detected.

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