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. 09, 2003
Filed:
Jul. 25, 2002
Francesco Richard, Rivoli, IT;
Marco Tonetti, Turin, IT;
C.R.F. Societa Consortile per Azioni, Orbassano, IT;
Abstract
There is described a control device for controlling the speed of an engine of a vehicle, and having a tracer block which receives a target engine speed indicating the desired engine speed, and a maximum engine torque, and supplies a reference engine speed indicating the behaviour of the engine speed during a transient speed state towards the target engine speed, and an open-loop torque indicating the drive torque which must be produced by the engine during the transient speed state for the engine speed to follow the reference engine speed; an observer block which receives a measured engine speed indicating the engine speed, and a combustion torque indicating the drive torque generated by fuel combustion, and supplies an observed engine speed representing an estimate of engine speed made on the basis of a system model and as a function of the combustion torque and the measured engine speed, and an observed resisting torque representing an estimate of the total resisting torque acting on the drive shaft of the engine and made as a function of the observed engine speed and the measured engine speed; and a controller block which receives the open-loop torque, the reference engine speed, the observed engine speed, and the observed resisting torque, and supplies the combustion torque; the controller block controlling the engine so that the drive torque generated by fuel combustion equals the combustion torque.