Engine torque control
First Claim
1. A method (1) for quantifying the net torque (28) produced by an internal combustion engine (102) from which power may be drawn through a gearbox, comprising:
- estimating a nominal gross engine torque (2);
estimating expected torque losses (17,19,21) associated with the engine (102);
calculating an estimated net torque (28) from the gross engine torque (2) and expected torque losses (17,19,21);
determining an engine acceleration;
estimating an actual net torque (29) produced by the engine from the determined engine acceleration; and
determining (52) whether or not engine power is drawn through the gearbox;
wherein the expected torque estimation includes holding expected torque loss correction values (51) in an adaptive memory, said values (51) being generated from a difference between the estimated (28) and actual (29) net torque estimates, and then storing in the adaptive memory (20) if it is determined (52) that engine power is not drawn through the gearbox.
8 Assignments
0 Petitions
Accused Products
Abstract
The present invention relates to an apparatus (1) and a method for quantifying the net torque (28) produced by an internal combustion engine, for example, in a motor vehicle. Nominal gross engine torque (2) and expected torque losses (17,19,21) associated with the engine (102) are estimated. Estimated net torque (28) from the gross engine torque (2) and expected torque losses (17,19,21) are calculated. If it is determined that no power is drawn through the gearbox, a corrective torque loss value (21) corrects the estimated expected torque losses associated with the engine (102)
-
Citations
7 Claims
-
1. A method (1) for quantifying the net torque (28) produced by an internal combustion engine (102) from which power may be drawn through a gearbox, comprising:
-
estimating a nominal gross engine torque (2); estimating expected torque losses (17,19,21) associated with the engine (102); calculating an estimated net torque (28) from the gross engine torque (2) and expected torque losses (17,19,21); determining an engine acceleration; estimating an actual net torque (29) produced by the engine from the determined engine acceleration; and determining (52) whether or not engine power is drawn through the gearbox;
wherein the expected torque estimation includes holding expected torque loss correction values (51) in an adaptive memory, said values (51) being generated from a difference between the estimated (28) and actual (29) net torque estimates, and then storing in the adaptive memory (20) if it is determined (52) that engine power is not drawn through the gearbox. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A method of quantifying the net torque produced by an internal combustion engine (102) from which power may be drawn through a gearbox, comprising the steps of:
-
a) estimating (4) a nominal gross engine torque (2); b) estimating (10,16,20) expected torque losses (17,19,21) associated with the engine (102); c) calculating (26) an estimated net torque (28) from the gross engine torque (2) and expected torque losses (17,19,21); d) determining (36) an engine acceleration; e) estimating (34,36,38) an actual net torque (29) produced by the engine (102) from the determined engine acceleration; f) determining (52) whether or not engine power is drawn through the gearbox; g) taking a difference between the actual (29) and net (28) torque estimates, and generating (30) therefrom a torque loss correction value (32,51); h) storing the torque loss correction value (51) in an adaptive memory (20) if it has been determined in step (f) that no power is drawn through the gearbox; and i) repeating the above steps, and when performing step (b), retrieving from the adaptive memory (20) a corrective torque loss value (21) and using this to correct the estimated expected torque losses associated with the engine (102).
-
Specification