SYSTEM AND METHOD FOR ESTIMATING HYDRAULIC PRESSURE WITHIN AND CONTROLLING A DRY DUAL CLUTCH TRANSMISSION
First Claim
1. A control system for a dry dual clutch transmission (DCT), the control system comprising:
- a first module that detects whether a hydraulic pressure sensor of a hydraulic fluid delivery system in the dry DCT has failed;
a second module that estimates a pressure of hydraulic fluid within an accumulator of the hydraulic fluid delivery system based on one of (i) torque generated by and temperature of a hydraulic fluid pump and (ii) a drain down period of the accumulator and a period since the hydraulic fluid pump was on; and
a third module that controls start/stop of the hydraulic fluid pump based on the estimated hydraulic fluid pressure when the hydraulic pressure sensor has failed.
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Accused Products
Abstract
A control system for a dry dual clutch transmission (DCT) includes first, second, and third modules. The first module detects whether a hydraulic pressure sensor of a hydraulic fluid delivery system in the dry DCT has failed. The second module estimates a pressure of hydraulic fluid within an accumulator of the hydraulic fluid delivery system based on one of (i) torque generated by and temperature of a hydraulic fluid pump and (ii) a drain down period of the accumulator and a period since the hydraulic fluid pump was on. The third module controls start/stop of the hydraulic fluid pump based on the estimated hydraulic fluid pressure when the hydraulic pressure sensor has failed.
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Citations
20 Claims
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1. A control system for a dry dual clutch transmission (DCT), the control system comprising:
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a first module that detects whether a hydraulic pressure sensor of a hydraulic fluid delivery system in the dry DCT has failed; a second module that estimates a pressure of hydraulic fluid within an accumulator of the hydraulic fluid delivery system based on one of (i) torque generated by and temperature of a hydraulic fluid pump and (ii) a drain down period of the accumulator and a period since the hydraulic fluid pump was on; and a third module that controls start/stop of the hydraulic fluid pump based on the estimated hydraulic fluid pressure when the hydraulic pressure sensor has failed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for controlling a dry dual clutch transmission (DCT), the method comprising:
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detecting whether a hydraulic pressure sensor of a hydraulic fluid delivery system in the dry DCT has failed; estimating a pressure of hydraulic fluid within an accumulator of the hydraulic fluid delivery system based on one of (i) torque generated by and temperature of a hydraulic fluid pump and (ii) a drain down period of the accumulator and a period since the hydraulic fluid pump was on; and controlling start/stop of the hydraulic fluid pump based on the estimated hydraulic fluid pressure when the hydraulic pressure sensor has failed. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification