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:
Feb. 05, 1991
Filed:
Apr. 30, 1990
Franz Eidler, Vaihingen, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A fuel-metering system having a redundant control arrangement includes a main controller 12, an auxiliary controller 17, a first microprocessor 10, a second microprocessor 11, a switch-over unit 14, an actuator 15 and a fuel-metering unit 16. The second microprocessor emits a switch-over signal to the switch-over unit in the start phase of the internal combustion engine. The switch-over unit then supplies the actuator 15 with the actuator signal from the auxiliary control loop. A determination is made as to whether the actuator has reached the pregiven desired value. If this is indeed the case, then an indication is provided that the auxiliary controller and the switch-over unit are operating properly. If this is not the case, then the assumption can be made that the auxiliary controller or the switch-over unit is defective. In this case, a fault indication is provided.