TEST BED FOR RUNNING-IN OF INTERNAL-COMBUSTION ENGINES Russian patent published in 1995 - IPC

FIELD: test equipment. SUBSTANCE: test bed has electric motor 1, clutch 2, transmission 3 which output is coupled to crank shaft of engine 4, to inputs of rotational speed pickup 5, of controller 6 of rotational speed of engine shaft and of high-pressure fuel pump 7. Output of controller 6 of rotational speed is connected to output of first actuator 8 and to second input of high-pressure fuel pump 7 which output is linked to system of fuel feed into cylinders of engine 4, to which exhaust system mechanism 9 of increase of indicator load is connected. The latter is coupled to controller 11 of pull-in stroke of working element via second actuator 10. Apart from this first input of first actuator 8 is coupled to controller 12 of sweep stroke of working element of first actuator. Its second input connected to second input of second actuator 10 is coupled via switch 13 to output of commutator 14 which second input is linked to bus 15 of power supply of actuators and which first input is connected to output of unit 16 of control over commutator. First input of the latter is connected to common power supply bus 19 via anode-cathode junction of thyristor 17 and collector-emitter junction of transistor 18. In this case second input is linked to positive power supply bus 20. Output of rotational speed pickup 5 is connected to input of rotational speed meter 21 which output is linked to angular acceleration meter 22 and to first inputs of first 23 and second 24 comparators. Their second inputs are connected to adjustment unit 25 and their outputs are coupled to controlling electrode of thyristor 17 and base of transistor 18 correspondingly. In additional to it power supply bus 26 of electric motor is connected to input of electric motor via wattmeter 27. EFFECT: enhanced running-in capabilities. 3 cl, 3 dwg