Method of controlling engine speed during performance shift
AssigneeSiemens VDO Automotive Corporation
InventorsKevin Mijit, Douglas Raymond Martin, Stephen Marc Baker
Life of this patent
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Abstract
A method and system of automatically controlling engine speed of a vehicle in a turn employs an engine control system (10) to determine an optimal engine speed for the turn and an actual engine speed as sensed by an engine speed sensor (38). Engine control system (10) determines the difference between optimal engine speed and actual engine speed and compares this difference to current engine load. Based on this comparison, engine control system (10) then determines whether to alter engine speed and, if so, determines an amount to reduce the difference between optimal engine speed and actual engine speed.
Claims20
A method of controlling a vehicle engine, comprising the steps of:
- a) sensing a turning state of a vehicle;
- b) determining an optimal engine speed for the vehicle in the turning state;
- c) determining an actual engine speed for the vehicle in the turning state;
- d) comparing the actual engine speed with the optimal engine speed;
- e) determining whether a difference exists between the optimal engine speed and the actual engine speed;
- f) comparing the difference between the optimal engine speed and the actual engine speed with an engine load;
- and
- g) determining an amount to reduce the difference between the optimal engine speed and the actual engine speed based on step f).
A method of controlling a vehicle engine, comprising the steps of:
- a) sensing a turning state of a vehicle;
- b) determining an optimal engine speed for the vehicle in the turning state;
- c) determining an actual engine speed for the vehicle in the turning state;
- d) comparing the actual engine speed with the optimal engine speed;
- e) determining whether a difference exists between the optimal engine speed and the actual engine speed;
- f) comparing the difference between the optimal engine speed and the actual engine speed with an engine load;
- g) determining an amount to reduce the difference between the optimal engine speed and the actual engine speed based on step f);
- h) reducing the difference between the optimal engine speed and the actual engine speed by the amount determined by step g) wherein step h) comprises altering the actual engine speed to reduce the difference between the actual engine speed and the optimal engine speed by altering a torque output of an engine of the vehicle.
An engine control system comprising:
- an engine control unit for a vehicle;
- a sensor for determining a turning state of the vehicle, said sensor in communication with said engine control unit;
- an engine speed sensor in communication with said engine control unit;
- an engine load sensor in communication with said engine control unit;
- an engine speed logic guiding said engine control unit and in communication with said engine speed sensor, said engine speed logic for determining an optimal engine speed for the vehicle in the turning state and for determining an actual engine speed for the vehicle in the turning state from said engine speed sensor, said engine speed logic further for comparing the actual engine speed with the optimal engine speed and for determining whether a difference exists between the optimal engine speed and the actual engine speed;
- an engine load logic in communication with said engine load sensor, said engine load logic for comparing the difference between the optimal engine speed and the actual engine speed with an engine load and for determining an amount to reduce the difference based on the engine load.
Dependencies are inferred from the claim text.