Control for vehicle with transmission
First Claim
1. A method for controlling an engine coupled to a transmission having at least one gear in which an over-running clutch is present, the transmission having an input speed and an output speed, the method comprising:
- determining a synchronous transmission input speed based on the transmission state and a parameter indicative of the transmission output speed;
indicating whether a current gear is a gear in which an over-running clutch is present; and
in response to said indication, adjusting an engine operating parameter to maintain the transmission input speed at or below said synchronous transmission input speed.
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Accused Products
Abstract
A method for controlling an engine coupled to a transmission is described. The method is especially suited for a transmission having at least one gear in which an over-running clutch is present. The invention describes a method for adjusting an engine operating parameter to maintain transmission input speed at or below a synchronous transmission input speed when the transmission is in the gear with the over-running clutch. The synchronous transmission input speed is based on transmission state and transmission output speed. Alternatively, vehicle speed can be used in place of transmission output speed.
38 Citations
17 Claims
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1. A method for controlling an engine coupled to a transmission having at least one gear in which an over-running clutch is present, the transmission having an input speed and an output speed, the method comprising:
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determining a synchronous transmission input speed based on the transmission state and a parameter indicative of the transmission output speed;
indicating whether a current gear is a gear in which an over-running clutch is present; and
in response to said indication, adjusting an engine operating parameter to maintain the transmission input speed at or below said synchronous transmission input speed. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A system comprising:
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an internal combustion engine;
a transmission having at least one gear in which an over-running clutch is present, the transmission having an input speed and an output speed, the transmission coupled to said drive unit; and
a controller determining a synchronous transmission input speed based on a transmission state and a parameter indicative of said transmission output speed, indicating whether a current gear is a gear in which an over-running clutch is present, and in response to said indication, adjusting an engine operating parameter to maintain the transmission input speed at or below said synchronous transmission input speed. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A method for controlling an engine coupled to a transmission having at least one gear in which an over-running clutch is present, the transmission having an input speed and an output speed, the method comprising:
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determining a synchronous transmission input speed based on a transmission state and a parameter indicative of the transmission output speed;
indicating whether a current gear is a gear in which an over-running clutch is present; and
in response to said indication, determining a desired engine speed at or below said synchronous transmission input speed, and adjusting an engine operating parameter to maintain actual engine speed at said desired speed. - View Dependent Claims (15, 16, 17)
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Specification