Method and device for determining a motor reference torque of a motor vehicle
AssigneeZf Cv Systems Europe BV
InventorsHartmut Binder, Michael Knosmann, Youssef Swaid
Life of this patent
Estimating the term…
Abstract
A method is for determining the engine reference torque, used in a controller of a motor vehicle, of the engine of the motor vehicle, wherein the engine reference torque is determined by estimation. A value for the mass of the motor vehicle and a motor vehicle velocity value determined at each of two different times during acceleration of the motor vehicle are determined. An engine power of the engine is calculated from these values, and a value for the engine reference torque is estimated via the calculated engine power on the basis of power and torque curves, which are stored as a function of the speed of the engine.
Claims18
A method for determining an engine reference torque (MRM), used in a controller of a motor vehicle, of an engine of the motor vehicle, the method comprising:
- determining a value for a mass (m) of the motor vehicle and a motor vehicle velocity value (v(t1), v(t2)) determined at each of two different times (t1, t2) during acceleration of the motor vehicle;
- calculating an engine power (P′;
- P) of the engine from the value for the mass (m) and the motor vehicle velocity value (v(t1), v(t2));
- and,
- estimating a value for the engine reference torque (MRM) via the calculated engine power (P′;
- P) on a basis of power and torque curves, which are stored as a function of a speed (nM) of the engine.
A device for determining an engine reference torque, used in a controller of a motor vehicle, of an engine of the motor vehicle, the device comprising:
- a computer configured to calculate an engine power (P′, P) of the engine from a value for a mass (m) of the motor vehicle and from motor vehicle velocity values (v(t1), v(t2)) obtained at two different times (t1, t2) during acceleration of the motor vehicle;
- and,
- an estimator configured to estimate a value for the engine reference torque (MRM) via the calculated engine power (P′, P) on a basis of power and torque curves, which are stored as a function of the speed (nM) of the engine.
A controller of a braking system of a motor vehicle, the controller comprising:
- a processor;
- a non-transitory computer readable storage medium having program code stored thereon;
- said program code being configured, when executed by said processor, to:
- determine a value for a mass (m) of the motor vehicle and a motor vehicle velocity value (v(t1), v(t2)) determined at each of two different times (t1, t2) during acceleration of the motor vehicle;
- calculate an engine power (P′;
- P) of an engine from the value for the mass (m) and the motor vehicle velocity value (v(t1), v(t2);
- and,
- estimate a value for the engine reference torque (MRM) via the calculated engine power (P′;
- P) on a basis of power and torque curves, which are stored as a function of a speed (nM) of the engine.
Dependencies are inferred from the claim text.