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. 21, 2012
Filed:
May. 11, 2007
Masaya Michishita, Toyota, JP;
Michiaki Nakao, Toyota, JP;
Masaya Michishita, Toyota, JP;
Michiaki Nakao, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A vehicle drive force control apparatus for controlling a drive force of a vehicle including: a main drive power source for driving main drive wheels through a coupling device and a transmission, an electric generator operated by a drive force generated by the main drive power source, and an electric motor which is driven by electric power generated by the electric generator, to generate a drive torque that can be transmitted to auxiliary drive wheels. The vehicle drive force control apparatus controls the coupling device and transmission to reduce an engaging force of the coupling device and shift up the transmission during driving of the auxiliary drive wheels, so that the operating speed of the main drive power source is raised according to a load of the coupling device, while the electric power generated by the electric generator is increased, permitting an increase of the drive torque of the auxiliary drive wheels and stable 4-wheel-drive control.