System and method of controlling engine torque of hybrid vehicle
First Claim
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1. A vehicle comprising:
- an engine and a motor selectively coupled by a clutch; and
a controller programmed to,responsive to driver-demanded torque exceeding a maximum torque of the motor and the clutch being locked, confine rates of output torque increase of the engine to a limit having a first value, andresponsive to the driver-demanded torque being satisfied, reduce the limit to a second value.
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Abstract
A vehicle includes an engine and a motor selectively coupled by a clutch. A controller of the vehicle is programmed to, responsive to driver-demanded torque exceeding a maximum torque of the motor and the clutch being locked, confine rates of output torque increase of the engine to a limit having a first value, and responsive to the driver-demanded torque being satisfied, reduce the limit to a second value.
13 Citations
20 Claims
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1. A vehicle comprising:
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an engine and a motor selectively coupled by a clutch; and a controller programmed to, responsive to driver-demanded torque exceeding a maximum torque of the motor and the clutch being locked, confine rates of output torque increase of the engine to a limit having a first value, and responsive to the driver-demanded torque being satisfied, reduce the limit to a second value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A vehicle comprising:
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a traction battery; an engine; a step-ratio gearbox including multiple discrete gear ratios; a motor coupled to the gearbox with a torque converter and electrically connected to the traction battery; a disconnect clutch selectively coupling the engine and the motor when locked; and a controller programmed to, responsive to driver-demanded torque exceeding a maximum torque of the motor, start the engine and command engagement of the disconnect clutch, and responsive to the disconnect clutch being locked, command torque of the engine such that increases in the torque are rate limited according to a first rate of change until the driver-demanded torque is achieved, and then are rate limited according to a second rate of change that is less than the first rate. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A method of rate limiting engine torque comprising:
by a controller, responsive to a clutch being locked to fix an engine to a motor and driver-demanded torque exceeding a maximum torque of the motor, confining rates of output torque increase of the engine to a limit having a first value, and responsive to the driver-demanded torque being satisfied, reducing the limit to a second value. - View Dependent Claims (17, 18, 19, 20)
Specification