Patent ID: 7117965

Claim:
A control apparatus for taking failure countermeasure for a hybrid vehicular drive system, comprising: a planetary gear mechanism to which four elements of an engine, a first motor/generator, a second motor/generator, and an output member are linked in such a manner that, on a lever diagram of the planetary gear mechanism, a revolution speed order is the first motor/generator, the engine, the output member, and the second motor/generator; first and second clutching sections that are arranged at one and the other ends of the lever diagram with the output member as an intermediate position on the lever diagram, each of the first and second clutching section prescribing a speed line according to a clutching thereof; a drive source output abnormality detecting section that detects an output abnormality of each of the engine, the first motor/generator, and the second motor/generator which are drive sources; and a drive source failure countermeasure control section that, with one of the first and second clutching sections clutched, enables a vehicular run using at least one of the drive sources whose output is detected to be normal when the drive source output abnormality detecting section detects that the output abnormalities in any one or two of the drive sources occur.