Friction element load sensing in an automatic transmission
First Claim
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1. A method of measuring torque in an automatic transmission including a friction element with a sensor mounted therein, said method comprising:
- measuring a portion of torque transmitted through the friction element with the sensor; and
sending a signal representative of the torque to a controller for use in controlling a ratio shift change in the transmission.
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Abstract
A load sensor assembly for measuring an amount of torque transmitted through a torque establishing element includes a core mounted on a transmission housing and a load sensor mounted on the core. The load sensor is positioned against a portion of the torque establishing element whereby a portion of the amount of torque transmitted through the torque establishing element travels through the load sensor and is measured. A cable is connected to the load sensor for transmitting a signal representative of the amount of torque to a transmission controller.
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Citations
20 Claims
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1. A method of measuring torque in an automatic transmission including a friction element with a sensor mounted therein, said method comprising:
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measuring a portion of torque transmitted through the friction element with the sensor; and sending a signal representative of the torque to a controller for use in controlling a ratio shift change in the transmission. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 19)
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10. A method of measuring torque in a multiple-ratio automatic transmission including a controller, a housing, an input torque source, a torque output member, first and second friction elements, a sensor mounted in one of the first or second friction elements and gearing for an automotive vehicle powertrain, defining multiple torque flow paths from the input torque source to the torque output member, said method comprising:
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shifting from a low speed ratio to a higher speed ratio with the first and second friction elements during a ratio upshift event having a preparatory phase, a torque phase and an inertia phase; measuring a portion of torque transmitted through the one of the first or second friction elements with the sensor; and sending a signal representative of the portion of torque to the controller for use in controlling the ratio upshift event. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 20)
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Specification