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:
Feb. 08, 2005
Filed:
Sep. 25, 2001
Stefan Tumback, Stuttgart, DE;
Klaus-peter Schnelle, Ditzingen, DE;
Stefan Tumback, Stuttgart, DE;
Klaus-Peter Schnelle, Ditzingen, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
Two methods for operating a motor vehicle driven by an internal combustion engine (VM) and by two electrical machines (E, E) are proposed. The motor vehicle has a transmission (G) with two power paths (LP, LP) controllable independently of one another. Each power path (LP, LP) is coupled via a respective epicyclic gear (P, P) to one of the electrical machines (LP, LP) and to the input shaft (KW) of the transmission (G) and can be coupled via shiftable gears (, R) to the output shaft (AW) of the transmission (G). The object is to make it possible to operate the motor vehicle more efficiently. To reduce circulating mechanical power flow between the two power paths (LP, LP), particularly in the boost mode or upon recuperation of braking energy, the gear combination (, R) is varied, or the engine rpm is lowered, or only one electrical machine (E, E) is used as a generator. More-comfortable operation is additionally achieved in that upon electrical starting, the engine (VM) is started simultaneously.