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:
May. 08, 2001
Filed:
Jun. 24, 1999
Takahiro Yamafuji, Yokohama, JP;
Yasuo Kouda, Yokohama, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
In an apparatus for controlling an internal combustion engine equipped with an evaporative emission control system comprises an electronic control unit configured to be connected to at least an electronically-controlled throttle and an electronic fuel injection system, the control unit comprises a desired air flow rate setting section setting a desired air flow rate on the basis of at least an opening of an accelerator, and a desired fuel-flow quantity setting section setting a desired quantity of fuel flow on the basis of the desired air flow rate and a predetermined air/fuel ratio. A purge gas flow detection section is provided for detecting a purge-air flow rate of purge air flowing through the purge line and a purge fuel-flow quantity of purge fuel vapor flowing through the purge line. A desired throttle air flow rate is arithmetically calculated by subtracting the purge-air flow rate from the desired air flow rate, whereas a desired fuel-injection quantity is arithmetically calculated by subtracting the purge fuel-flow quantity from the desired quantity of fuel flow. The opening of the electronically-controlled throttle is controlled on the basis of the desired throttle air flow rate, whereas the fuel-injection quantity of fuel to be injected from the fuel injector is controlled on the basis of the desired fuel-injection quantity.