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. 31, 1988
Filed:
Apr. 24, 1987
Akito Onishi, Toyota, JP;
Abstract
The amount of fuel injection is augmented on a hot engine start by prolonging the fuel injection time or boosting the fuel pressure. For extension of the fuel injection time, a basic fuel injection time is prolonged according to a hot start fuel increment coefficient which is obtained from a two-dimentional map based on a intake air temperature stored in a memory during an engine operation (an operating intake air temperature) and the difference between the operating intake air temperature and an intake air temperature detected on restart of the engine. In case of an apparatus for augmenting the fuel injection by boosting the fuel pressure to be supplied to a fuel injector, the control pressure to be admitted into a diaphragm chamber of a pressure regulator is switched according to a two-dimentional map providing switching and unswitching conditions in terms of the difference between the operating intake air temperature and restarting intake air temperature in relation with operating intake air temperature.