PROBLEM TO BE SOLVED: To provide a four-wheel drive vehicle equipped with an engine switchable between a compression ignition mode and a spark ignition mode, which suppresses generation of abnormal sound in torque transmitting means in the spark ignition mode and in the compression ignition mode while suppressing deterioration in fuel economy.SOLUTION: A control device 34 is provided in a four-wheel drive vehicle 10 that has: an engine 14 configured to be switchable between a compression ignition mode and a spark ignition mode; torque transmitting means that transmits output torque T of the engine 14 to front wheels 12F as main driving wheels and rear wheels 12R as auxiliary driving wheels; a coupling 28 for adjusting torque Tto be distributed to the rear wheels 12R; and abnormal sound reducing means that adjusts the distribution of torque to the rear wheels 12R so as to suppress generation of abnormal sound when operating the engine in an abnormal sound generation area where the torque transmitting means 50 becomes an abnormal sound generation state. The device sets the distribution of torque to the rear wheels 12R in the compression ignition mode larger than the distribution of torque in the spark ignition mode.SELECTED DRAWING: Figure 3
【課題】圧縮着火モードと火花点火モードとに切換可能なエンジンを備えた四輪駆動車において、燃費の悪化を抑制しながら、火花点火モード及び圧縮着火モードにおいて、トルク伝達手段における異音発生を抑制する。【解決手段】圧縮着火モードと火花点火モードとに切換可能に構成されたエンジン14と、エンジン14の出力トルクTを主駆動輪としての前輪12Fと補助駆動輪としての後輪12Rとに伝達するトルク伝達手段と、後輪12Rに配分されるトルクTRを調整するカップリング28と、トルク伝達手段50が異音発生状態となる異音発生領域でのエンジン作動時に、異音の発生を抑制するように後輪12Rに対するトルク配分を調整する異音低減手段と、を有する四輪駆動車10の制御装置34であって、圧縮着火モードにおける後輪12Rに対するトルク配分を、火花点火モードにおけるトルク配分よりも増大させる。【選択図】図3
CONTROL DEVICE OF FOUR-WHEEL DRIVE VEHICLE AND FOUR-WHEEL DRIVE VEHICLE
四輪駆動車の制御装置及び四輪駆動車
04.08.2016
Patent
Elektronische Ressource
Japanisch
IPC: | B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion / F02D CONTROLLING COMBUSTION ENGINES , Steuern oder Regeln von Brennkraftmaschinen |
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