| 摘要 |
PURPOSE:To enable intentional control of turn characteristics, by a method wherein, through change of transmission ratios of continuously variable transmissions on the front and the rear side according to control of a regulating lever, a difference is produced between driving forces exerted on front and rear wheels. CONSTITUTION:A CVT control means 10 sets the fundamental transmission ratios of CVT 2a and 2b of a driving system according to a running condition, and a reduction ratio between the CVT 2a and 2b for front and rear wheels is decided through CVT driving means 12a and 12b. In which case, when a regulating lever 7 is controlled from a neutral position, a control amount is decided by a lever position deciding means 13, a front and rear wheel transmission ratio correction value calculating means 15 determines a correction value from a map, stored in a memory part 14, based on the control amount, and a transmission ratio is corrected to produce a difference between driving forces on front and rear wheels. This constitution enables provision of turn characteristics of over steering or under steering responding to the control amount of the regulating lever 7.
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