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. 17, 2001
Filed:
Oct. 28, 1999
Applicant:
Inventors:
Peter Bobretzky, Aschach/Steyr, AT;
Harald Pastleitner, Steyr, AT;
Assignee:
TCG Unitech Aktiengesellschaft, Kirchdorf/Krems, AT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01P 5/14 ;
U.S. Cl.
CPC ...
F01P 5/14 ;
Abstract
In an electrically driven coolant pump with an electromotor-pump unit an electronic control unit, generates a pulse-width modulated control signal for the pump depending on at least one engine operating parameter. In order to recognize irregularities and malfunctions in the pump's operation in due time, the control unit is connected with an error detector for the recognition of abnormal control signals and pump operating conditions and with a speed controlling device for the pump speed, with the error detector having an emergency device for the coolant pump.