Abstract: A vehicle includes: an engine including cylinder, a piston, a crankshaft unit, a balancing shaft unit, and an engine cooling passage; a power generating system including a generator and a generator cooling passage; and a cooling system that includes a mechanical water pump driven by the crankshaft unit, a first heat exchanger in fluid communication with the mechanical water pump and the engine cooling passage to constitute a first cooling circuit, an electrically controlled water pump, a second heat exchanger in fluid communication with the electrically controlled water pump and the generator cooling passage to constitute a second cooling circuit, and a controlling unit for controlling operation of the electrically controlled water pump.

Abstract: An engine includes a cylinder system, a driving system including a piston and a crankshaft, a power generating system and a cooling system. The power generating system is disposed on a side of the driving system and includes a generator and a counterweight. The generator includes a main body and a rotor pivotally disposed within the main body. The cooling system is disposed on an opposite side of the driving system and includes a first water pump in fluid communication with the cylinder system. An outline of the rotor is projected along the crankshaft to form a first projecting zone. Projections of the first water pump and the driving system along the crankshaft overlap the first projecting zone.

Abstract: A vehicle includes: an engine including an air cylinder, a piston, a crankshaft unit, a balancing shaft unit, and an engine cooling passage; a power generating system including a generator and a generator cooling passage; and a cooling system that includes a mechanical water pump driven by the crankshaft unit, a first heat exchanger in fluid communication with the mechanical water pump and the engine cooling passage to constitute a first cooling circuit, an electrically controlled water pump, a second heat exchanger in fluid communication with the electrically controlled water pump and the generator cooling passage to constitute a second cooling circuit, and a controlling unit for controlling operation of the electrically controlled water pump.

Abstract: An engine includes an air cylinder system, a driving system including a piston and a crankshaft, a power generating system and a cooling system. The power generating system is disposed on a side of the driving system and includes a generator and a counterweight. The generator includes a main body and a rotor pivotally disposed within the main body. The cooling system is disposed on an opposite side of the driving system and includes a first water pump in fluid communication with the air cylinder system. An outline of the rotor is projected along the crankshaft to forma first projecting zone. Projections of the first water pump and the driving system along the crankshaft are located almost wholly in the first projecting zone.