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US 4,829,433 AGranted
Control system for continuously variable transmission
AssigneeNissan Motor Co., Ltd.
InventorsMasaki Nakano, Haruyoshi Kumura
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AssigneeNissan Motor Co., Ltd.
InventorsMasaki Nakano, Haruyoshi Kumura
Estimating the term…
A control system for a continuously variable transmission for a vehicle, includes a hydraulically operable driver pulley, a follower pulley, a transmission V-belt tensioned between the driver and follower pulleys, and means, including a shift actuator and a shift control valve, for hydraulically controlling a reduction ratio between the driver and follower pulleys. In order to provide inproved shift response of the transmission upon depressing an accelerator pedal after a quick brake state of a vehicle where the vehicle wheels are locked, a position of a movable conical disk of the driver pulley which it would assume after initiation of the quick brake state is determined by arithmetic operation, and a shift actuator is driven toward a position thereof corresponding to the position assumed by the driver pulley so that the V-belt is tensioned between the driver and follower pulleys and conditioned to be ready for torque transmission.
A control system for a continuously variable transmission for a vehicle including an engine with a throttle valve which opens in degrees, the continuously variable transmission including a hydraulically operated driver pulley, a follower pulley, a transmission V-belt tensioned between the driver and follower pulleys, and means, including a shift actuator and a shift control valve, for hydraulically controlling a reduction ratio between the driver and follower pulleys, said control system comprising:
A control method for a continuously variable transmission for a vehicle including an engine with a throttle valve which opens in degrees, the continuously variable transmission including a hydraulically operated driver pulley, a follower pulley, a transmission V-belt tensioned between the driver and follower pulleys, and means, including a shift actuator and a shift control valve, for hydraulically controlling a reduction ratio between the driver and follower pulleys, said control method comprising the steps of:
In a vehicle including an engine with a throttle valve which opens in degrees, a continuously variable transmission, and a brake, the continuously variable transmission including a driver pulley, a follower pulley, a transmission V-belt drivingly connected between the driver and follower pulleys and a transmission output shaft drivingly connected to the follower pulley, vehicle speed sensor means for measuring rotation of the transmission output shaft to detect a vehicle speed of the vehicle and generating a vehicle speed indicative signal indicative of the rotation of the transmission output shaft measured, throttle opening sensor means for detecting an opening degree of the throttle valve and generating a throttle opening degree indicative signal indicative of the opening degree of the throttle valve detected, a method of controlling a reduction ratio between the driver and follower pulleys, said method comprising the steps of:
Dependencies are inferred from the claim text.