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:
Oct. 19, 1999
Filed:
May. 13, 1998
Junya Morikawa, Toyota, JP;
Denso Corporation, Kariya, JP;
Abstract
A control method and system that achieves a desired purge flow rate in accordance with operation of a variable valve timing control mechanism. Although pumping loss of an internal combustion engine is varied by a change in the amount of operating the variable valve timing control mechanism, a change in an intake pressure in an intake passage is caused by influence of inertia supercharging, and the purge flow rate is changed. In this case, an opening degree of a purge solenoid valve is set according to the respective amount of operating the variable valve timing control mechanism. The set opening degree is considered by the ECU, and a final opening degree of the purge solenoid valve is set, so that a desired purge flow rate can be controlled regardless of the operation of the variable valve timing control mechanism.