Device and method for estimation of an engine torque
AssigneesAudi AG, IAV GmbH, Fraunhofer-Gesellschaft e.V.
InventorsThorsten Schmidt, Winfried Schultalbers, Henning Raacha, Hermann Fehrenbach, Kurt Bluhm, Carsten Hohmann
Life of this patent
Estimating the term…
Abstract
Alternating torque {tilde over (M)}kv(φ) or the mean indicated pressure Pml is to be determined from the angular velocity ω from the engine speed, for engine management, for example. Charge pressure compensation (5) must be effected in order for a usable result to be obtained. By preference sensor wheel error compensation (2) and inertial force compensation (4) are also effected. The mean indicated pressure Pml is obtained from the alternating torque {tilde over (M)}v(φ) in a characteristic diagram.
Claims15
A method for determining torque of an internal combustion engine comprising:
- acquiring a first measured variable relating to an angular velocity of an internal combustion engine,
- acquiring a second measured variable relating to a charge pressure of the internal combustion engine or simulation of a charge pressure value on the basis of the first measured variable and
- determining the torque from the first measured variable and the second measured variable or from the first measured value and the simulated charge pressure value.
A device for determination of torque of an internal combustion engine, said device comprising
- a first sensor mechanism for acquisition of a first measured variable relating to angular velocity of the internal combustion engine,
- a second sensor mechanism for acquisition of a second measured variable relating to charge pressure of the internal combustion engine or a simulation mechanism for simulation of a charge pressure quantity as a function of the first measured variable and
- a data processing mechanism connected to the first and second sensor mechanisms or to the first sensor mechanism and to the simulation mechanism for determination of torque from the first measured variable and the second measured variable or from the first measured variable and the simulated charge pressure variable.
A method for determination of the torque of an internal combustion engine, said method comprising
- measuring a first variable relating to an angular velocity of the internal combustion engine,
- measuring a second variable, wherein said second variable relates to one of:
- a charge pressure of the internal combustion engine and
- simulation of a charge pressure value on the basis of the first variable;
- and
- calculating said torque from said first variable and one of said second variable and said simulation of a charge pressure value.
Dependencies are inferred from the claim text.