SU942066A1 - Device for simulating ic engine - Google Patents

Description

(54) DEVICE FOR MODELING INTERNAL COMBUSTION ENGINE

one

The invention relates to the field of numerical technique and can be used to train drivers in vehicle simulators and research stands.

A device for simulating an internal combustion engine is known, comprising an integrator made on an amplifier, the output of which is simultaneously connected to the inputs of the regulator model, Q pa and a functional converter of the engine characteristics, the output of which is connected to the first integrator rotation, and the output of the controller model is connected the second input of the functional engine generator is 1.5

The disadvantage of the device is that it does not simulate the starting characteristics of the engine and the effect of the oil temperature, on the starting and killing of the engine.

The closest in technical essence to the proposed is a device comprising a fuel supply controller, an integrator, adders, inverters, a voltage divider, playback units, inertial units, and comparison units 21.

The disadvantage of this device also includes the impossibility of modeling the starting characteristics.

The purpose of the invention is the expansion of functional capabilities by reproducing engine starting characteristics.

Claims (2)

The goal is achieved by the fact that an amplifier and an oil temperature sensor, the output of which is connected to the first input of the adder, are inserted into a device for simulating an internal combustion engine containing an integrator, blocks of reproducing nonlinearities, an adder, a power source, a comparator unit and a rectifier element. , the second input of which is connected to the output of the power source, the output of the adder is connected to the first input of the comparator unit, the output of which through the rectifier element is connected to the first input of the integral, the output to is costly directly connected to the second input of the comparator unit, to the first input of the first nonlinear reproduction unit and a chain of serially connected amplifiers and the second nonlinearity reproducing unit is connected to the second input of the first nonlinearity reproducing unit, the output of which is connected to the second integrator input. The drawing shows a diagram of a device for simulating an internal combustion engine. It contains the integrator 1, the rectifying element 2, the block 3 is comparable to. No, blocks 4 and 5 of nonlinearity reproduction, adder 6, oil temperature sensor 7, power source 8 and amplifier 9. Block 4 and amplifier 9 form a model of controller Yu, in which the input value is a voltage proportional to the output voltage of the output shaft Gastel, and the output voltage is proportional to the displacement of the control element, the dependence is functional. Block 5 is the dependence of engine torque on crankshaft speed. The device works as follows. The basic equation on which the basis of the operation of the device, has the form,) - MS, where - the moment of inertia, reduced to the motor shaft; (SU is the angular rotational speed of the drive shaft; 1 (1) is the torque acting on the follower shaft, depending on the angular velocity of the engine shaft and the amount of fuel; fc is the torque to rotation. The indicated equation is solved using integrator 1. Dependency. PSAO) is formed by block 5, to one input from which integrate 1 enters a pumping proportional to the revolutions of the engine shaft, and to the other a voltage depending on the fuel supply. This voltage forms with the model of the 1O regulator. Simulation of the starting characteristics of the engine is based on the fact that, when the engine shaft turns below the minimum steady, the moment of rise is sharply increased. This is accomplished with the aid of block 3, to one input of which From the adder 6, a voltage is supplied proportional to the minimum stable rpm of the engine shaft, depending on a voltage proportional to the temperature of the engine oil. To the other input of the block 3 from the integrator 1, a voltage proportional to the revolutions of the motor shaft is supplied. If this voltage is higher than the voltage of minimally stable turns, then at the output of unit 3 there is a nagfling of such polarity, i.e. Comparison unit 3 does not affect engine operation. If the voltage that is not passed by the rectifying element 2 from the output of the integrator 1 becomes less than the voltage from the Output of the adder 6, the voltage at the output of the comparison unit 3 changes sign and through the rectifying element 2 enters the input of the integrator 1, t. e. the moment increases sharply. The dependence of the voltage proportional to the minimum steady engine speed is provided by the adder 6 and the oil temperature sensor 7 in such a way that, the smaller the voltage proportional to the oil temperature, the higher the voltage determining the minimum stable engine speed. The proposed device allows the engine starting characteristics to be simulated depending on the oil temperature. Apparatus for modeling an internal combustion engine, comprising an integrator, non-linearity playback units, an adder, a power source, a comparison unit and a rectifier element, characterized in that, in order to enhance the functionality by reproducing the starting characteristics of the engine, an amplifier and oil temperature sensor, the output of which is connected to the first input of the adder, the second input of which is connected to the output of the power source, the output of the adder is connected to The first input of the comparator, the output of which through the rectifier element is connected to the first input of the integrator, the output of which is directly connected to the second input of the comparator, to the first input of the first nonlinearity playback unit and through the chain to the series-connected amplifier and the second nonlinearity playback unit to the second input of the first reproducing unit of linearity, the output of which is connected to the second input of the integrator. Sources of information taken into account Irk expertise & 4 6 1, Lime in Higher education institutions, sir. Engineering. Edition MVTU them. Bauman. 1965, No. 12, p. 48. 2. USSR author's certificate number 64O326, cl. Q About G7 / 62, 1976 (prototype).