Shift rail transmission position sensing with tolerance for sensor loss
First Claim
1. A system, comprising:
- a number N of position sensors, each sensor associated with one of N shift rails in a shift rail transmission system, wherein each sensor is electrically coupled to a control module having an electrical reference to the sensor and receives data in the form of an electrical signal from the sensor; and
wherein the set of N sensors is divided into subsets and each subset is provided a common reference from the control module;
a processing component that determines from data from each sensor whether the shift rail associated with that sensor is in a position of engagement of a first gear, a position of engagement of a second gear, or in a neutral position; and
a second source of position information for at least one of the N shift rails, wherein the source of position information for an individual rail M is a second position sensor on rail M.
3 Assignments
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Accused Products
Abstract
A number N of position sensors, each associated with one of N shift rails in a shift rail transmission system, wherein the set of N sensors is divided into subsets and each subset is provided a common reference from a control module; and a processing component that determines from data from each sensor whether the shift rail associated with that sensor is in a position of engagement of a first gear, a position of engagement of a second gear, or in a neutral position.
Further, providing a first common reference to a first set of shift rail position sensors; providing a second common reference to a second set of shift rail position sensors; receiving sensor data from each position sensor; determining that the data from the first set of position sensors is unreliable; and operating a transmission using only the gears related to the position sensors in the second set.
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Citations
19 Claims
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1. A system, comprising:
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a number N of position sensors, each sensor associated with one of N shift rails in a shift rail transmission system, wherein each sensor is electrically coupled to a control module having an electrical reference to the sensor and receives data in the form of an electrical signal from the sensor; and
wherein the set of N sensors is divided into subsets and each subset is provided a common reference from the control module;a processing component that determines from data from each sensor whether the shift rail associated with that sensor is in a position of engagement of a first gear, a position of engagement of a second gear, or in a neutral position; and a second source of position information for at least one of the N shift rails, wherein the source of position information for an individual rail M is a second position sensor on rail M. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method, comprising:
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providing a first common electrical reference to a first set of position sensors, each position sensor attached to a shift rail of a transmission; providing a second common electrical reference to a second set of position sensors, each position sensor attached to a shift rail of a transmission; receiving sensor data from each position sensor in the first set and in the second set; determining, in a computing device, from data from each sensor whether the shift rail associated with that sensor is in a position of engagement of a first gear, a position of engagement of a second gear, or in a neutral position; determining that the data from the first set of position sensors is unreliable; and operating the transmission using only the gears related to the position sensors in the second set.
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19. A system, comprising:
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a number N of position sensors, each sensor associated with one of N shift rails in a shift rail transmission system, wherein each sensor is electrically coupled to a control module that provides an electrical reference to the sensor and receives data in the form of an electrical signal from the sensor; and
wherein the set of N sensors is divided into subsets and each subset is provided a common electrical reference from the control module; anda processing component that determines from data from each sensor whether the shift rail associated with that sensor is in a position of engagement of a first gear, a position of engagement of a second gear, or in a neutral position, wherein the processing component determines, in a dual-clutch shift rail transmission, the position of two shift rails to monitor the engagement of one gear concurrent with the disengagement of another during an upshift or downshift of the transmission.
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Specification