In a hybrid vehicle in which the front or rear set of wheels is driven by an engine (7) and the other set of wheels is driven by a motor (8), a traveling mode deciding unit (4) is provided with a table for deciding engine throttle opening and motor output, with driving force being distributed in accordance...http://www.google.com/patents/US5176213?utm_source=gb-gplus-sharePatent US5176213 - Driving force distribution system for hybrid vehicles
