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:
Oct. 16, 2018
Filed:
Jul. 29, 2016
Piaggio & C. S.p.a, Pontedera (PI), IT;
PIAGGIO & C. S.P.A., Pontedera (PI), IT;
Abstract
A process for managing the re-start of an internal combustion engine in a Start and Stop system using an electric motor managed by an electric motor control unit (EMU), a first step of direct evaluation of the rotation regime of the crankshaft being provided by an internal combustion engine control unit (ECU) through a sensor put on the crankshaft: if the rotation regime is above a threshold corresponding to the sensor accuracy loss, in case of re-opening of the throttle valve said control unit of the combustion engine (ECU) continues to provide fuel and ignition; otherwise a crankshaft positioning step is provided by the electric motor control unit (EMU) comprising: a forward crankshaft rotation by a predetermined forward rotation angle; a detection of a possible piston stall state followed, in negative case, by an additional forward crankshaft rotation until reaching a maximum predetermined forward rotation angle; an inverse crankshaft rotation by a predetermined angle; and a detection of a possible piston stall state followed, in negative case, by an additional inverse crankshaft rotation until reaching a maximum predetermined inverse rotation angle.