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:
Apr. 09, 1985
Filed:
Oct. 24, 1984
Dorian F Mowbray, Burnham, GB;
Lucas Industries Public Limited Company, Birmingham, GB;
Abstract
A fuel system for a multi-cylinder engine comprises a plurality of engine operated pumps supplying fuel to the injection nozzles respectively of an engine. Each pump has an electromagnetic valve which must be closed to cause delivery of fuel by the respective pumps. The supply of power to the windings of the valves is effected by a power module controlled by a distributor circuit which receives sequence signals to ensure that the valves are closed at the correct time and a fuel level signal to ensure that the valve is closed for the correct length of time. In order to ensure that the amount of fuel delivered through each nozzle is the same a sensor provides a pulse signal at each working stroke of the engine. The period between each signal is determined by a timer circuit and the average of a number of periods is obtained from an averaging circuit. The average period is compared with the actual value and any error is used in a compensating circuit 29 to adjust the time the respective valve is closed.