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:
Jul. 30, 2002
Filed:
Aug. 24, 2000
Applicant:
Inventor:
Frank Van Der Staay, Würselen, DE;
Assignee:
FEV Motorentechnik GmbH, Aachen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01L 9/04 ; F02D 4/100 ; G01M 1/500 ;
U.S. Cl.
CPC ...
F01L 9/04 ; F02D 4/100 ; G01M 1/500 ;
Abstract
A method for recognizing misfires in a piston-type internal-combustion engine with spark ignition and an engine control unit (ECU) for actuating electromagnetic actuators to operate the cylinder valves. The time difference between the opening time preset by the engine control unit and the actual opening time of an exhaust valve is detected as the actual value, then compared to a preset tolerance-time difference as the nominal value, and a signal is generated if this nominal value is not met, i.e., the nominal value exceeds the actual value.