POWER TRANSMISSION APPARATUS FOR VEHICLE OF FOUR-WHEELED DRIVE TYPE

A power transmission apparatus for a vehicle of four-wheel drive type includes a first rotary shaft (11) for transmitting drive force to front wheels (9) of the vehicle, a second rotary shaft (14) for transmitting drive force to rear wheels (16) of the vehicle, a hydraulic oil pump (VP) used as conn...

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Bibliographische Detailangaben
1. Verfasser:	HIRAMATSU, TAKEO
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES AUXILIARY DRIVES FOR VEHICLES BLASTING BRAKES CLUTCHES COUPLINGS FOR TRANSMITTING ROTATION ENGINEERING ELEMENTS AND UNITS GEARING GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING INSTRUMENTATION OR DASHBOARDS FOR VEHICLES LIGHTING MECHANICAL ENGINEERING PERFORMING OPERATIONS THERMAL INSULATION IN GENERAL TRANSPORTING VEHICLES IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	A power transmission apparatus for a vehicle of four-wheel drive type includes a first rotary shaft (11) for transmitting drive force to front wheels (9) of the vehicle, a second rotary shaft (14) for transmitting drive force to rear wheels (16) of the vehicle, a hydraulic oil pump (VP) used as connecting means for connecting the first and second rotary shafts (11, 14) and driven by the difference in rotation speed between the first and second rotary shafts (11, 14) to deliver hydraulic oil of an amount depending on the difference in rotation speed and having a suction passage and a delivery passage to be changed over in dependence on relative rotational direction of the first and second rotary shafts (11, 14), restricting means for restricting pressure of hydraulic oil delivered from the hydraulic oil pump (VP), and an expansion chamber communicating with the suction and delivery passages for reserving hydraulic oil to temporarily suppress increase in pressure of hydraulic oil delivered from the hydraulic oil pump (VP), thereby suppressing transmission of drive force by the hydraulic oil pump (VP) when the variation in relative rotation speed between the first and second rotary shafts (11, 14) is small.