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. 22, 1998
Filed:
Dec. 02, 1996
Juergen Seekircher, Ostfildern, DE;
Martin Bair, Stuttgart, DE;
Mercedes-Benz AG, Stuttgart, DE;
Abstract
A method and an apparatus for testing the electrical connection of electrically controlled, electromagnetically operated injection valves of an internal-combustion engine which are equipped with solenoid coils. The cabling of such injection valves is tested in a non-contact manner by positioning a respective magnetic field sensor close to a respective injection valve within a magnetic stray field vicinity of the injection valves. A voltage is applied to the electric connection intended for the respective injection valve, and it is determined whether a magnetic stray field in the vicinity of the corresponding injection valve resulting from this voltage is detected by the assigned magnetic field sensor. The method and apparatus can be used to test whether the injection valves are correctly connected with the connection individually intended for them. The method and apparatus may be used in a bench test for an internal combustion engine.