TRANSMISSION CONTROL METHOD FOR CONTINUOUSLY VARIABLE TRANSMISSION
First Claim
1. A transmission control method for a continuously variable transmission having a plurality of transmission control modes comprising the following steps:
- wherein in a first transmission control mode,lowering an actual transmission gear ratio when a target engine speed calculated from vehicle velocity and throttle position is higher than an actual engine speed, andraising said actual transmission gear ratio when said target engine speed is lower than said actual engine speed; and
in a second transmission control mode,calculating a target transmission gear ratio based on said target engine speed, which is calculated from said vehicle velocity and said throttle position, and said vehicle velocity, andchanging said actual transmission gear ratio toward said calculated target transmission gear ratio.
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Abstract
A transmission control method for a continuously variable transmission for enhancing the response of a change in engine speed to a driver'"'"'s accelerating/decelerating operation. In a hydraulic type continuously variable transmission, when a sport operating mode is being selected (step S1: SPORT OPERATING MODE), a target engine speed T_NE (rpm) is calculated from the vehicle velocity V (km/hr) and the position 0 (degrees) of a throttle valve 60 (step S4). Further, a target angle T_A (degrees) for a motor swash plate is calculated from the vehicle velocity and the target engine speed T_NE (step S5). The motor swash plate is moved according to the difference between the actual angle A of the motor swash plate 46 and the target angle T_A.
29 Citations
19 Claims
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1. A transmission control method for a continuously variable transmission having a plurality of transmission control modes comprising the following steps:
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wherein in a first transmission control mode, lowering an actual transmission gear ratio when a target engine speed calculated from vehicle velocity and throttle position is higher than an actual engine speed, and raising said actual transmission gear ratio when said target engine speed is lower than said actual engine speed; and in a second transmission control mode, calculating a target transmission gear ratio based on said target engine speed, which is calculated from said vehicle velocity and said throttle position, and said vehicle velocity, and changing said actual transmission gear ratio toward said calculated target transmission gear ratio. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A transmission control method for a continuously variable transmission comprising the following steps:
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calculating a target transmission gear ratio from a target engine speed, which is calculated from vehicle velocity and throttle position, and said vehicle velocity, and changing an actual transmission gear ratio toward said calculated target transmission gear ratio.
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11. A transmission control method for a continuously variable transmission having a plurality of transmission control modes comprising the following steps:
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wherein in a first transmission control mode, calculating a target engine speed from a vehicle velocity and throttle position; lowering an actual transmission gear ratio when the target engine speed is higher than an actual engine speed, and raising said actual transmission gear ratio when said target engine speed is lower than said actual engine speed; and in a second transmission control mode, calculating a target transmission gear ratio based on said target engine speed and said vehicle velocity, and changing said actual transmission gear ratio toward said calculated target transmission gear ratio. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification