Patent ID: 8276396

Claim:
A transport refrigeration unit of the type configured to be mounted on the front wall of a transport trailer which is adapted to be connected to and towed by a motorized tractor, comprising: a structural support framework configured to be attached to the front wall of the transport trailer; an outer cover configured to be supported by said framework; and the following components, all supported by said framework and contained within said outer cover: a compressor having a discharge port and a suction port and further having an electric compressor drive motor hermetically disposed therein; a condenser heat exchanger operatively coupled to said compressor discharge port; an evaporator heat exchanger unit operatively coupled to said compressor suction port; at least one fan assembly having at least one electric fan motor configured to provide air flow over at least one of said heat exchangers; an integrally mounted unitary engine-driven generator assembly, with the generator assembly having a stator with windings and a rotor for producing electrical power to drive at least some of the aforementioned components; and a supply of engine lubricating oil provided to said generator stator and rotor in sufficient quantity to provide the necessary cooling to allow sustained operation thereof wherein said oil supply is integral with the engine lubricating oil in the engine and is caused to flow from one or more galleys in a portion of the engine to a portion of the generator stator; and a spray device that receives the engine lubricating oil from said one or more galleys and sprays the engine lubricating oil on the stator windings at an upper end of the generator to flow downwardly over the generator rotor and over the stator windings at a lower end of the generator.