a motor - integrated transmission mechanism for use in parallel hybrid electric vehicles . the transmission can provide five basic modes of operation that can be further classified into sixteen sub - modes : one electric motor mode , four engine modes , four engine / charge modes , three power modes and four regenerative braking modes . each of these sub - modes can be grouped into like clutching conditions , providing the functional appearance of a conventional 4 - speed automatic transmission , with electric launch , engine - only , engine / charge , power - assist , and regeneration capability . cvt capability is provided with one of the engine / charge modes . the transmission can be incorporated in front - wheel drive and in rear - wheel drive vehicles .