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:
Aug. 24, 1982
Filed:
Feb. 15, 1980
Thomas Kuttner, Stuttgart, DE;
Wolf Wessel, Oberriexingen, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
An apparatus for damping bounce-induced oscillations in an internal combustion engine having a fuel metering control for supplying fuel to the engine in accordance with various operational signals, which includes an engine speed sensor for generating an rpm signal proportional to the engine rpm, a signal differentiation circuit for producing an rpm differential signal from the rpm signal, and a phase-shifting circuit, connected to receive the rpm differential signal, for supplying to the fuel metering control a bounce damping signal which is proportional to the rpm differential signal and which is phase-displaced with respect to the rpm differential signal so that the fuel metering control supplies fuel to the engine to countercontrol the bounce-induced oscillations of the engine. In a preferred embodiment, the phase-shifting circuit includes a controllable dead time element for varying the phase displacement in accordance with the bounce frequency so as to compensate for the total system transit time of the apparatus, to thus effect countercontrolling of the bounce oscillations which is correctly phased and correct in frequency.