Hybrid vehicle engine idling control
AssigneeJaguar Land Rover Limited
InventorsRodolfo Oliveira Jaccoud, Matthew Hancock, Olivier Jean Brice Roques
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Abstract
Aspects of the present invention relate to a method and to a control system for controlling an engine and an electric traction motor of a vehicle, the control system comprising one or more controllers, wherein the control system is configured to: receive an indication of engine speed during engine idling; and control the electric traction motor to reduce a difference between the engine speed and an engine idle speed target.
Claims20
A control system for controlling an engine and a first electric traction motor of a vehicle, the control system comprising one or more controllers, wherein the control system is configured to:
- receive an indication of engine speed during engine idling;
- control the first electric traction motor to reduce a difference between the engine speed and an engine idle speed target including using the first electric traction motor to reduce the engine speed when the engine speed is above the engine idle speed target;
- and
- control the engine based on a charging target for a traction battery charging while maintaining engine spark retardation of substantially zero relative to maximum brake torque ignition timing,
- wherein the first electric traction motor is configured to provide a positive torque to the engine,
- wherein the traction battery is connected to a second electric traction motor configured to provide torque to a drivetrain of the vehicle.
A method of controlling an engine and a first electric traction motor of a vehicle, the method comprising:
- receiving an indication of engine speed during engine idling;
- controlling the first electric traction motor to reduce a difference between the engine speed and an engine idle speed target including using the first electric traction motor to reduce the engine speed when the engine speed is above the engine idle speed target;
- and
- controlling the engine based on a charging target for a traction battery charging while maintaining engine spark retardation of substantially zero relative to maximum brake torque ignition timing,
- wherein the first electric traction motor is configured to provide a positive torque to the engine,
- wherein the traction battery is connected to a second electric traction motor configured to provide torque to a drivetrain of the vehicle.
A control system for controlling an engine and a first electric traction motor of a vehicle, the control system comprising one or more controllers, wherein the control system is configured to:
- receive an indication of engine speed during engine idling;
- control the first electric traction motor to reduce a difference between the engine speed and an engine idle speed target including using the first electric traction motor to reduce the engine speed when the engine speed is above the engine idle speed target;
- and
- control the engine based on a charging target for a traction battery charging while maintaining an ignition timing retardation of zero or less than 5 degrees of retardation from a maximum brake torque ignition timing or from a most efficient ignition timing of a control map for the engine if different,
- wherein the first electric traction motor is configured to provide a positive torque to the engine,
- wherein the traction battery is connected to a second electric traction motor configured to provide torque to a drivetrain of the vehicle.
Dependencies are inferred from the claim text.