METHOD FOR ESTIMATING THE POWER OF MECHANICAL LOSSES OF AN INTERNAL COMBUSTION ENGINE Russian patent published in 2022 - IPC G01M15/04 

FIELD: internal combustion engines.

SUBSTANCE: invention can be used in estimating the power of mechanical losses of an internal combustion engine. The method for estimating the power of mechanical losses of an internal combustion engine consists in the fact that during tests under operating conditions, a vehicle with a manual gearbox is prepared, for which force transducers (1) are installed in the engine mounts, a sensor (2) is mounted in the clutch housing opposite the flywheel ring gear crankshaft speed, to which the measuring device (3) is connected. The engine is started and warmed up together with the gearbox to the nominal temperature, then tests are carried out in which the run-out parameters are recorded. When measuring under operating conditions, turn on the first gear and start moving, by supplying fuel to the engine cylinders, smoothly increase the crankshaft speed until the maximum value is reached, then abruptly turn off the fuel supply to the engine cylinders. Simultaneously with the period of 720 degrees of rotation of the crankshaft, the instantaneous values ​​of the forces arising in the engine mounts and the crankshaft rotation frequency are recorded until the vehicle reaches the minimum speed. Based on the set of instantaneous values ​​of forces on the supports, for each measurement moment, the total force and the total reduced torque on the supports are calculated separately, taking into account the average distance from the axis of rotation of the crankshaft to the measurement points of the forces on the supports. Based on the obtained values ​​of the total reduced torque on the supports and the measured instantaneous values ​​of the crankshaft speed, the power of mechanical losses of the engine is calculated for each measurement moment. An approximating dependence of the power of mechanical losses of the engine on the crankshaft speed is built, the maximum value is found on the obtained curve and taken as the maximum power of mechanical losses of the engine under study.

EFFECT: reducing labor intensity and increasing the efficiency of diagnosing the assessment of the power of mechanical losses of the engine.

1 cl, 3 dwg