Hybrid transmission launch algorithm
First Claim
1. A launch system for a hybrid vehicle, comprising:
- a pump that is driven by an internal combustion engine and that provides pressurized fluid to a transmission;
an electronic throttle that selectively adjusts airflow to said internal combustion engine;
an electric motor that drives the internal combustion engine during a vehicle launch;
a sensor that detects when a brake pedal has been released; and
a hybrid control module that controls said electronic throttle to increase pressure of said pressurized fluid and to inhibit torque transfer to said transmission when said sensor detects that said brake pedal has been released until one of a predetermined pressure and time condition has been met.
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Accused Products
Abstract
A launch system for a hybrid vehicle includes a pump, an electronic throttle, a sensor, and a hybrid control module. The pump is driven by an internal combustion engine and provides pressurized fluid to a transmission. The electronic throttle selectively adjusts airflow to the internal combustion engine and current to an electric motor. The sensor detects when a brake pedal has been released. The hybrid control module increases pressure of the pressurized fluid and limits torque transfer from at least one of the internal combustion engine and the electric motor when the sensor detects that the brake pedal has been released until a predetermined condition has been met. The hybrid control module increases pressure of the pressurized fluid with the pump by increasing the revolutions of the internal combustion engine and limits torque to the transmission by retarding the responsiveness of the electronic throttle.
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Citations
10 Claims
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1. A launch system for a hybrid vehicle, comprising:
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a pump that is driven by an internal combustion engine and that provides pressurized fluid to a transmission; an electronic throttle that selectively adjusts airflow to said internal combustion engine; an electric motor that drives the internal combustion engine during a vehicle launch; a sensor that detects when a brake pedal has been released; and a hybrid control module that controls said electronic throttle to increase pressure of said pressurized fluid and to inhibit torque transfer to said transmission when said sensor detects that said brake pedal has been released until one of a predetermined pressure and time condition has been met. - View Dependent Claims (2, 3, 4, 5)
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6. A method for launching a hybrid vehicle, comprising:
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providing a pump that is driven by an internal combustion engine and that provides pressurized fluid to a transmission; selectively adjusting airflow to said internal combustion engine; driving said internal combustion engine using an electric motor during a vehicle launch; detecting when a brake pedal has been released; and increasing pressure of said pressurized fluid and inhibiting torque transfer to said transmission when said brake pedal has been released until one of a predetermined pressure and time condition has been met. - View Dependent Claims (7, 8, 9, 10)
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Specification