FOUR-WHEEL DRIVE VEHICLE

The invention provides a four-wheel drive vehicle. The four-wheel drive vehicle can suppress or prevent NV deterioration caused by increase of vibration of a drive system during automatic start control. On the basis of the rear-wheel-side distribution rate (Xr), a target engine rotation speed (Nestt...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	TAKAIRA KOJI
Format:	Patent
Sprache:	chi ; eng
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 CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE ORDIFFERENT FUNCTION CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES INSTRUMENTATION OR DASHBOARDS FOR VEHICLES PERFORMING OPERATIONS ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TOTHE CONTROL OF A PARTICULAR SUB-UNIT TRANSPORTING VEHICLES IN GENERAL
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Beschreibung
Zusammenfassung:	The invention provides a four-wheel drive vehicle. The four-wheel drive vehicle can suppress or prevent NV deterioration caused by increase of vibration of a drive system during automatic start control. On the basis of the rear-wheel-side distribution rate (Xr), a target engine rotation speed (Nesttgt) at the time of startup is changed with respect to a prescribed engine rotation speed (Nestf) at the time of startup, wherein the target engine rotation speed (Nesttgt) at the time of startup is set to a rotation speed separated from the resonance rotation speed (Nx) of the drive system. Therefore, the generation of resonance of the drive system due to the torque fluctuation of the engine can be suppressed or avoided when the automatic start control (CTst) is performed. 本发明提供一种四轮驱动车辆，该四轮驱动车辆能在进行自动起动控制时抑制或防止由于驱动系统的振动变大而导致的NV的恶化。基于后轮侧分配率(Xr)来相对于规定起动时发动机转速(Nestf)变更起动时目标发动机转速(Nesttgt)，起动时目标发动机转速(Nesttgt)被设定为与驱动系统的共振转速(Nx)分离的转速，因此能在进行自动起动控制(CTst)时抑制或避免因发动机的转矩变动导致的驱动系统的共振的产生。