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US 10,479,349 B2Granted
Methods and system for launching a hybrid vehicle
AssigneeFord Global Technologies, LLC
InventorsRajit Johri, Minku Lee, Justin Panhans
Life of this patent
Estimating the term…
Abstract
Systems and methods for launching a hybrid vehicle that includes a motor/generator and an automatic transmission with a torque converter are described. The systems and methods may permit improved vehicle acceleration to enhance hybrid vehicle performance during specific vehicle launch conditions. The launch conditions may be established based on brake pedal position and accelerator pedal position.
Claims17
A vehicle operating method, comprising:
- adjusting speed of a torque converter impeller from a first speed to a second predetermined speed in response to contemporaneously applying a brake pedal and an accelerator pedal, where the second predetermined speed is a speed where an engine and an electric machine have capacity to provide a combined first torque, the combined first torque greater than combined maximum torque output capacity of the engine and the electric machine operating at any speed other than the second predetermined speed.
A vehicle operating method, comprising:
- adjusting speed of a torque converter impeller from a first speed to a second predetermined speed in response to contemporaneously applying a brake pedal and an accelerator pedal, where the first speed is a speed of a pump equal to or above which the pump provides hydraulic line pressure greater than a threshold pressure.
A vehicle operating method, comprising:
- adjusting speed of a torque converter impeller from a first speed to a second predetermined speed in response to contemporaneously applying a brake pedal and an accelerator pedal;
- and
- adjusting output torque of an engine to provide a threshold torque in response to releasing the applied brake pedal, where adjusting speed of the torque converter impeller from the first speed to the second predetermined speed includes adjusting speed of the torque converter impeller only after accelerator pedal position exceeds a threshold while a vehicle that includes the engine is stopped.
A system, comprising:
- an engine;
- a motor/generator;
- a transmission mechanically coupled to the engine and the motor/generator, the transmission including a torque converter impeller;
- and
- a controller including executable instructions stored in non-transitory memory to:
- adjust speed of the torque converter impeller from a first speed to a second predetermined speed in response to contemporaneously applying a brake pedal to provide greater than a threshold amount of driven wheel braking torque and applying an accelerator pedal to a position that is greater than a threshold;
- and
- cancel torque requested via the accelerator pedal in response to torque requested via the brake pedal when the accelerator pedal is at a position that is less than the threshold.
5 more elements
Dependencies are inferred from the claim text.