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:
Sep. 28, 1982
Filed:
Mar. 28, 1980
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
An engine control system is provided with a memory having an area addressed by two parameters chosen out of a group of throttle valve position, manifold pressure and engine rotation number, memorizing digital forms of predetermined fuel injection quantities plotted at points separated with a given distance. The values stored in those areas are read out to give a digital form of fuel injection quantity addressed with said parameters introduced by the sensors during the engine operation. The read-out value is multiplied by a coefficient concerning at least one of such detected values as air pressure, aspirated air temperature and engine temperature in order to give a corrected quantity with which the fuel injection is controlled. In this invention the digital controlling quantities stored in the first memory are plotted with short interval and high accuracy where the throttle opening angle is small and the interval is increased with increasing throttle opening angle. It is favorable in this invention to use a higher order bit signal of the parameter for reading out the necessary fuel injection control digital quantity from the memory, and to use a lower order bit signal of the parameter for interpolating the read-out fuel injection quantity.