The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 25, 2003
Filed:
Sep. 24, 2001
Eiji Nishimura, Hiroshima, JP;
Takahisa Ishihara, Hiroshima, JP;
Koichi Hatamura, Hiroshima, JP;
Hiroyuki Takebayashi, Hiroshima, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
The present invention has an object to effectively prevent deterioration of combustion characteristics when engine temperature is low. There is provided an intake pressure controller that effects control such that, when an operating condition discriminator that identifies engine temperature identifies low engine temperature after engine start-up, control by an engine controller (feedback controller ) that performs engine control on fluctuation of intake negative pressure to decrease the intake negative pressure is suppressed until the temperature of the intake passage rises to at or above a predetermined value, and such that the intake negative pressure is made larger.