FOUR-WHEEL DRIVE VEHICLE

• Main Authors: OKUDA KOICHI, TABATA ATSUSHI, OMURO KEISUKE, NAKANO MASATO, MAKINO YUKI
• Format: Patent
• Language: English; Japanese
• Published: 14.10.2021
• Subjects: 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; CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE ORDIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; 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; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TOTHE CONTROL OF A PARTICULAR SUB-UNIT; THERMAL INSULATION IN GENERAL; TRANSPORTING; VEHICLES IN GENERAL; WEAPONS

To provide a control device for a four-wheel drive vehicle capable of increasing a driving force while suppressing the occurrence of slippage of main driving wheels in a four-wheel drive vehicle in which a main side distribution ratio, being the ratio of the driving force transmitted to the main driving wheels to a total driving force, can be adjusted.SOLUTION: Since a total gear ratio γtvl, being the ratio of an engine rotation speed Ne of an engine 12 to an output rotation speed No of an output shaft 60 in a low vehicle speed range in the same simulated gear stage, is increased, when a rear wheel side distribution ratio Xr, being the ratio of a driving force Fr transmitted to rear wheels 16 to a total driving force Ft of a four-wheel drive vehicle 10, is small and the rear wheels 16 are less likely to slip compared to when the rear wheel side distribution ratio Xr is large, it is possible to increase the total driving force Ft of the four-wheel drive vehicle 10 while suppressing the occurrence of slippage in the rear wheels 16 when the rear wheel side distribution ratio Xr is large.SELECTED DRAWING: Figure 10 【課題】総駆動力に対する主駆動輪に伝達する駆動力の割合である主側配分率を調節可能な四輪駆動車両において、主駆動輪のスリップの発生を抑制しつつ、駆動力を増加できる四輪駆動車両の制御装置を提供する。【解決手段】四輪駆動車両１０の総駆動力Ｆtに対する後輪１６に伝達する駆動力Ｆrの割合である後輪側配分率Ｘrが小さく、後輪側配分率Ｘrが大きいときに比べて後輪１６にスリップが発生し難いときには、同じ模擬ギヤ段での低車速域における出力軸６０の出力回転速度Ｎoに対するエンジン１２のエンジン回転速度Ｎeの比であるトータル変速比γtvlが大きくされるため、後輪側配分率Ｘrが大きいときの後輪１６にスリップが発生してしまうのを抑制しつつ、四輪駆動車両１０の総駆動力Ｆtを増加させることができる。【選択図】図１０