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:
May. 27, 2014
Filed:
Dec. 02, 2010
John William Edward Fuller, Leyland, GB;
John William Edward Fuller, Leyland, GB;
Torotrak (Development) Limited, Lancashire, GB;
Abstract
The invention concerns an arrangement for controlling a vehicle drivetrain having an engine provided with a speed governor and a continuously variable transmission ('CVT') incorporating a variator which is constructed and arranged to regulate its reaction torque. The control system comprises a control part () movable by the driver to provide a driver input, an open loop subsystem () for operatively coupling the control part to the governor () to control no-load speed of the governor in dependence on the driver input, a closed loop subsystem comprising a comparator () which receives a first control signal deprived from the driver input and corresponding to a target engine speed, and a second control signal corresponding to engine speed, and which adjusts variator reaction torque in dependence upon a comparison of the first and second control signals causing the transmission to load the engine suitably to achieve the target engine speed.