Method and apparatus for monitoring a transmission range selector in a hybrid powertrain transmission
First Claim
1. Method to monitor integrity of a signal output from an operator-manipulable transmission range selector for a powertrain system wherein a control module performs the following steps, comprising:
- determining a range state corresponding to a signal from a range encoder attached to the transmission range selector and determining a direction state corresponding to a signal from a direction encoder attached to the transmission range selector, wherein the range state directly corresponds to a discrete position of the transmission range selector and wherein the direction state corresponds to rotational direction of an output member of the powertrain system;
determining the discrete position of the transmission range selector based upon the range state and the direction state; and
performing back rationality to verify the discrete position of the transmission range selector.
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Accused Products
Abstract
A method to monitor integrity of a signal output from an operator-manipulable transmission range selector for a powertrain system includes equipping the transmission range selector with a range encoder and a direction encoder, determining a range state and a direction state based upon signals from the range encoder and the direction encoder, determining a discrete position of the transmission range selector based upon the range state and the direction state, and performing back rationality to verify the discrete position of the transmission range selector.
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Citations
15 Claims
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1. Method to monitor integrity of a signal output from an operator-manipulable transmission range selector for a powertrain system wherein a control module performs the following steps, comprising:
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determining a range state corresponding to a signal from a range encoder attached to the transmission range selector and determining a direction state corresponding to a signal from a direction encoder attached to the transmission range selector, wherein the range state directly corresponds to a discrete position of the transmission range selector and wherein the direction state corresponds to rotational direction of an output member of the powertrain system; determining the discrete position of the transmission range selector based upon the range state and the direction state; and performing back rationality to verify the discrete position of the transmission range selector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. Method to monitor integrity of a signal output from an operator-manipulable transmission range selector for a transmission of a hybrid powertrain system, wherein a control module performs the following steps comprising:
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determining a range state corresponding to a signal input from a range encoder attached to the transmission range selector and determining a direction state corresponding to a signal input from a direction encoder attached to the transmission range selector, wherein the range state directly corresponds to a discrete position of the transmission range selector and wherein the direction state corresponds to rotational direction of an output member of the transmission; determining a preferred discrete position of the transmission range selector comprising an operator-selected transmission range based upon the range state and the direction state; verifying the preferred discrete position of the transmission range selector based upon the range state and the direction state; and controlling operation of the transmission based upon the validated transmission range state. - View Dependent Claims (12, 13, 14)
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15. System for monitoring integrity of a signal output from an operator-manipulable transmission range selector for a powertrain system, comprising:
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a range encoder providing a respective signal; a direction encoder providing a respective signal; and a computer-readable medium encoded with a set of program instructions configured to; determine a range state corresponding to the signal from the range encoder and determine a direction state corresponding to the signal from the direction encoder, wherein the range state directly corresponds to a discrete position of the transmission range selector and wherein the direction state corresponds to rotational direction of an output member of the powertrain system; determine a discrete position of the transmission range selector comprising an operator-selected transmission range based upon the range state and the direction state, and execute back rationality to verify the discrete position of the transmission range selector comprising the operator-selected transmission range.
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Specification