Patent ID: 7992370

Claim:
A work machine, comprising: a primary power unit having a rated primary output, said primary power unit being couplable with at least one primary load, said at least one primary load including a propulsion load; an auxiliary power unit which is mechanically independent from said primary power unit, said auxiliary power unit having a rated auxiliary output which is smaller than said rated primary output, said auxiliary power unit being couplable with at least one external load, said at least one external load including an operator initiated load; and at least one electrical processing circuit configured for selectively coupling said primary power unit with at least one of said at least one primary load, and for selectively coupling said auxiliary power unit with at least one said at least one external load said auxiliary power unit including an auxiliary motor-generator mechanically coupled with said auxiliary power unit, said auxiliary motor-generator being configured to electrically drive at least one said at least one external load, said primary power unit including a primary motor-generator mechanically coupled with said primary power unit, said primary motor-generator and said auxiliary motor-generator being electrically coupled together.