Friction element load sensing in an automatic transmission
First Claim
1. In a multiple-ratio automatic transmission for an automotive vehicle powertrain, the automatic transmission including a controller, a transmission housing, an input torque source, a torque output member, gearing defining multiple torque flow paths from the input torque source to the torque output member and a pressure actuated torque establishing element for establishing a gear configuration with a low speed ratio or a gear configuration with a higher speed ratio during a ratio upshift event having a preparatory phase, a torque phase and an inertia phase, a load sensor assembly for measuring an amount of torque transmitted through the torque establishing element comprising:
- a core mounted on the transmission housing; and
a load sensor mounted on the core and 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 by the load sensor assembly, wherein a signal representative of the amount of torque transmitted through the torque establishing element is sent to the controller from the load sensor.
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Accused Products
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
24 Claims
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1. In a multiple-ratio automatic transmission for an automotive vehicle powertrain, the automatic transmission including a controller, a transmission housing, an input torque source, a torque output member, gearing defining multiple torque flow paths from the input torque source to the torque output member and a pressure actuated torque establishing element for establishing a gear configuration with a low speed ratio or a gear configuration with a higher speed ratio during a ratio upshift event having a preparatory phase, a torque phase and an inertia phase, a load sensor assembly for measuring an amount of torque transmitted through the torque establishing element comprising:
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a core mounted on the transmission housing; and a load sensor mounted on the core and 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 by the load sensor assembly, wherein a signal representative of the amount of torque transmitted through the torque establishing element is sent to the controller from the load sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A load sensor assembly, for measuring an amount of torque transmitted through a torque establishing element in a multiple-ratio automatic transmission for an automotive vehicle powertrain including a controller, a transmission housing, an input torque source, a torque output member, gearing defining multiple torque flow paths from the input torque source to the torque output member and a pressure actuated torque establishing element for establishing a gear configuration with a low speed ratio or a gear configuration with a higher speed ratio during a ratio upshift event having a preparatory phase, a torque phase and an inertia phase, comprising:
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a core mounted on the transmission housing; and a load sensor mounted on the core and 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 by the load sensor assembly, wherein a signal representative of the amount of torque transmitted through the torque establishing element is sent to the controller from the load sensor. - View Dependent Claims (23, 24)
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Specification