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. 12, 1996
Filed:
Aug. 22, 1994
Hiroshi Shibata, Kariya, JP;
Yoichi Nishiyori, Anjo, JP;
Kenichi Maki, Ichinoiya, JP;
Hiroshi Kondo, Anjo, JP;
Nippondenso Co., Ltd., Kariya, JP;
Abstract
A fuel injection control system having an intelligent timer (TPU) to perform fuel injection control using the TPU even on request of asynchronous injection which is not synchronous with rotational angle signals. A central processing unit (CPU) calculates a value to be used during the execution of a synchronous injection (e.g., a fuel injection time) and an asynchronous injection time and stores these values in a parameter RAM. The CPU determines whether there is a request for an asynchronous injection from, for example, the quantity of a change in the opening of a throttle. The TPU also executes a synchronous injection if there is no asynchronous injection request. If there is an asynchronous injection request, it transmits an on output from input/output pins and causes a compare register to store a value which is the sum of the current time and an asynchronous injection time. It transmits an off output from the input/output pins if this value agrees with a value in a first free run counter.