Control strategies for a dual range infinitely variable transmission
First Claim
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1. A method for adjustably controlling a coupling means for transmitting power from an engine rotationally driving a torque input source to a torque output for acceleratinga vehicle containing a continuously variable transmission comprising the following steps:
- ascertaining the power available from said torque input source;
adjustably coupling said available power through a continuously variable transmission to said torque output for accelarating said vehicle in order to accelerate said vehicle and said engine at desired rates;
substantially disengaging said coupling means and accelerating said input torque source until the rotational velocity of said input torque source substantially reaches a peak power velocity;
thensubstantially engaging said coupling means for transmitting power from said torque input source through said continuously variable transmission to said torque output in order to accelerate said vehicle.
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Abstract
A control strategy for obtaining optimal acceleration of a vehicle containing a dual range infinitely variable transmission. The transmission output clutch is selectively engaged in order to provide an optimal distribution of power during acceleration of a vehicle between accelerating the vehicle and accelerating the engine speed in order to obtain a higher power output from the engine.
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Citations
5 Claims
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1. A method for adjustably controlling a coupling means for transmitting power from an engine rotationally driving a torque input source to a torque output for acceleratinga vehicle containing a continuously variable transmission comprising the following steps:
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ascertaining the power available from said torque input source; adjustably coupling said available power through a continuously variable transmission to said torque output for accelarating said vehicle in order to accelerate said vehicle and said engine at desired rates; substantially disengaging said coupling means and accelerating said input torque source until the rotational velocity of said input torque source substantially reaches a peak power velocity;
thensubstantially engaging said coupling means for transmitting power from said torque input source through said continuously variable transmission to said torque output in order to accelerate said vehicle. - View Dependent Claims (2)
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3. A method for adjustably controlling a coupling means for transmitting power from an engine rotationally driving a torque input source to a torque output for accelerating a vehicle containing a continuously variable transmission comprising the following steps:
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ascertaining the power available from said torque input source; adjustably coupling said available power through a continuously variable transmission to said torque output for accelerating said vehicle in order to accelerate said vehicle and said engine at desired rates; receiving a disengagement signal; substantially completely disengaging said coupling means and accelerating the rotational velocity of said input torque source; receiving an engagement signal when a desired engine speed has been reached; engaging said coupling means; and
,increasing the ratio of said continuously variable transmission in order to accelerate the engine while accelerating said vehicle. - View Dependent Claims (4, 5)
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Specification