Automated manual transmission launch control
First Claim
1. A method of launch control for a vehicle with an engine, an automated manual transmission, and an automated clutch selectively engaging an output of the engine to an input of the transmission, the method comprising the steps of:
- (a) detecting a request for vehicle launch;
(b) obtaining an output speed of the automated clutch;
(c) determining a desired clutch output torque;
(d) partially engaging the automated clutch to allow for slip between an input to the clutch and an output from the clutch;
(e) determining a desired amount of the slip between the input to the clutch and the output from the clutch;
(f) calculating a desired engine speed based on the desired amount of slip; and
(g) automatically adjusting an engine torque to obtain the desired engine speed.
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Accused Products
Abstract
The present invention relates to launch control of a vehicle having an automated manual transmission and an automated clutch selectively engaging an output of an engine to an input of the transmission. When a request for vehicle launch is detected, an output speed of the automated clutch and a desired clutch output torque are obtained. The automated clutch is partially engaged to allow for slip between an input to the clutch and an output from the clutch, and a desired amount of the slip between the input to the clutch and the output from the clutch is determined. A desired engine speed is calculated based on the desired amount of slip, with the engine torque automatically adjusted to obtain the desired engine speed.
56 Citations
20 Claims
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1. A method of launch control for a vehicle with an engine, an automated manual transmission, and an automated clutch selectively engaging an output of the engine to an input of the transmission, the method comprising the steps of:
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(a) detecting a request for vehicle launch;
(b) obtaining an output speed of the automated clutch;
(c) determining a desired clutch output torque;
(d) partially engaging the automated clutch to allow for slip between an input to the clutch and an output from the clutch;
(e) determining a desired amount of the slip between the input to the clutch and the output from the clutch;
(f) calculating a desired engine speed based on the desired amount of slip; and
(g) automatically adjusting an engine torque to obtain the desired engine speed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of launch control for a vehicle with an engine, an automated manual transmission, and an automated clutch selectively engaging an output of the engine to an input of the automated manual transmission, the method comprising the steps of:
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(a) detecting a request for vehicle launch;
(b) operating in an engine speed control mode by automatically adjusting an engine torque to obtain a desired engine speed, with the desired engine speed being based on a desired amount of slip in the clutch; and
(c) operating in a soft lock control mode and ceasing step (b), when the amount of the slip in the automated clutch is below a slip threshold, by automatically adjusting the clutch to obtain the desired amount of slip in the clutch. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A vehicle comprising:
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an engine having an electronic throttle control and an output;
an automated manual transmission having an input;
an automated clutch operable to selectively engage the output of the engine with the input to the automated manual transmission; and
at least one controller operable to detect a request for vehicle launch, obtain an output speed of the automated clutch, determine a desired clutch output torque, partially engage the automated clutch to allow for slip between an input to the clutch and an output from the clutch, determine a desired amount of the slip between the input to the clutch and the output from the clutch, calculate a desired engine speed based on the desired amount of slip, and automatically adjust an engine torque to obtain the desired engine speed. - View Dependent Claims (19, 20)
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Specification