Vehicle control system
AssigneeJaguar Land Rover Limited
InventorNick Brockley
Life of this patent
Estimating the term…
Abstract
A control system (32, 33) for a vehicle (10), the control system (32, 33) comprising one or more controllers, the control system (32, 33) being configured to: receive a transmission speed signal that is indicative of an output speed of a transmission (24) of the vehicle (10) as the transmission (24) performs a gearshift; receive a driver demand signal that is indicative of a driver demand for acceleration of the vehicle (10) during the gearshift; and determine a torque demand signal for an engine (20) of the vehicle (10) in accordance with the transmission speed signal and the driver demand signal.
Claims11
A control system comprising one or more controllers, the control system being configured to:
- receive a transmission speed signal that is indicative of a transmission output speed during a gearshift;
- receive a driver demand signal that is indicative of a driver demand for vehicle acceleration during the gearshift;
- determine a torque demand signal for a vehicle engine in accordance with the transmission speed signal and the driver demand signal;
- receive an initial gear signal that is indicative of a transmission gear ratio at the start of the gearshift;
- receive a target gear signal that is indicative of a target transmission gear ratio;
- determine a torque ratio value based on the initial gear signal and the target transmission gear signal;
- apply the torque ratio value to the transmission output speed to determine an indicated engine speed, and to determine the torque demand signal in accordance with the indicated engine speed and the driver demand signal;
- and
- wherein the control system is further configured to predict variance in the torque ratio value during the gearshift to determine the torque ratio value.
A method of operating a vehicle, the method comprising:
- receiving a transmission speed signal that is indicative of an output speed of a transmission of the vehicle as the transmission performs a gearshift;
- receiving a driver demand signal that is indicative of a driver demand for acceleration of the vehicle during the gearshift;
- determining a torque demand signal for an engine of the vehicle in accordance with the transmission speed signal and the driver demand signal;
- receiving an initial gear signal that is indicative of a gear ratio of the transmission at the start of the gearshift;
- receiving a target gear signal that is indicative of a target gear ratio of the transmission;
- determining a torque ratio value based on the initial gear signal and the target gear signal;
- applying the torque ratio value to the transmission output speed to determine an indicated engine speed, and determining the torque demand signal in accordance with the indicated engine speed and the driver demand signal;
- and
- predicting variance in the torque ratio value during the gearshift to determine the torque ratio value.
A vehicle comprising:
- a transmission;
- and
- a control system configured to:
- receive a transmission speed signal that is indicative of an output speed of the transmission as the transmission performs a gearshift,
- receive a driver demand signal that is indicative of a driver demand for acceleration of the vehicle during the gearshift,
- determine a torque demand signal for an engine of the vehicle in accordance with the transmission speed signal and the driver demand signal,
- receive an initial gear signal that is indicative of a transmission gear ratio of the transmission at the start of the gearshift,
- receive a target gear signal that is indicative of a target transmission gear,
- determine a torque ratio value based on the initial gear signal and the target transmission gear signal,
- apply the torque ratio value to the transmission output speed to determine an indicated engine speed, and to determine the torque demand signal in accordance with the indicated engine speed and the driver demand signal, and
- wherein the control system is further configured to predict variance in the torque ratio value during the gearshift to determine the torque ratio value.
Dependencies are inferred from the claim text.