DRIVING FORCE DISTRIBUTION CONTROLLING TYPE FOUR-WHEEL DRIVE AUTOMOBILE

• Main Author: SAWASE KAORU
• Format: Patent
• Language: English
• Published: 28.01.1992
• 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; 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

PURPOSE:To make it hard to be affected by a disturbance as well as to enable it to perform stable control by calculating an actual speed difference between both front-and rear-wheel sides, and controlling a transfer torque regulating mechanism so as to make transfer torque capacity to the wheels correspond to the calculated speed difference. CONSTITUTION:A controller 48 calculates an equation of DELTAN(=NR-NF from rotational speed NF of a front wheel side output shaft and speed NR of a center differential 12 detected by speed sensors 60, 62, and an engine speed difference calculating part 48b. In addition, at a target engine speed difference calculating part 48a, a desired value (target speed difference) DELTAN0of a speed difference between both front-wheel side and rear-wheel side output shafts of the center differential 12 should be set. In addition, a hydraulic multiple disk clutch 28 as a transfer torque regulating mechanism is controlled by a torque control part 48c so as to make an actual speed difference DELTAN converge on the target engine speed difference DELTAN0 on the basis of each information out of the target engine speed difference calculating part 48a and the engine speed difference calculating part 48b.