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. 13, 2012
Filed:
Feb. 11, 2010
Mikihito Fujii, Hiroshima, JP;
Kazuya Yokota, Hiroshima, JP;
Naoyuki Yamagata, Hiroshima, JP;
Kazuaki Narahara, Hiroshima, JP;
Mikihito Fujii, Hiroshima, JP;
Kazuya Yokota, Hiroshima, JP;
Naoyuki Yamagata, Hiroshima, JP;
Kazuaki Narahara, Hiroshima, JP;
Mazda Motor Corporation, , JP;
Abstract
A valve overlap period is increased as a desired torque of an engine increases by advancing an opening timing of an intake valve at a rate greater than that of retarding a closing timing of an exhaust valve in a low engine-torque area in which the desired torque of the internal combustion engine is relatively low (step S). The valve overlap period is increased as the desired torque of the engine increases by retarding the closing timing of the exhaust valve at a rate greater than that of advancing the opening timing of the intake valve in a high engine-torque area in which the desired torque of the internal combustion engine is relatively high (step S). Accordingly, the drivability can be improved by obtaining the proper torque and the smooth torque curve in the wide driving area.