SU887957A1 - Device for measuring motor power - Google Patents

Description

(54) ENGINE POWER GRAIN DEVICE

The invention relates to a measurement technique and can be used to measure the power of an internal combustion engine (ICE) in all sectors of the national economy producing and using an internal combustion engine. A device is known for measuring engine power to accelerate a motor developed during acceleration and run-down of the engine. L | . However, the well-known instrument is complex in its circuit design and operation. The closest in technical essence is a device for measuring engine power, which contains a pulse sensor connected to a motor under study and connected to a pulse shaper, the output of which is connected to a level selector and one of the program switch inputs, the other two inputs are connected respectively, with the output of the level selector and the output of the clock pulse generator, and the outputs from the control inputs of the reversing pulse counter, the output of which is connected to indicator 2. The disadvantage of this device A significant measurement error occurs in determining the angle of rotation of the shaft at appropriate intervals when the integer number of label periods does not fit into them, as well as the complexity of the measurement process and low reliability due to the large number of impulses on the engine's power take-off shaft. The aim of the invention is to increase measurement accuracy and simplify the measurement process and increase reliability. This goal is achieved due to the fact that the unit of the vernier generator and the control system of the engine operating modes are inserted into the device, while the vernier generator unit is connected with the driver by its inputs

and one of the outputs of the software switch, and the output with one of the inputs of the software switch and with the counter input of the counter, which in turn is also connected to the output of the pulse driver, and the engine control system is connected with its inputs with the output of the level selector and the output program switch, and output with the engine under test.

Simplification of the measurement process and increase in reliability in the device is achieved due to the fact that it uses the engine system as the pulse sensor, carrying information about the angular position of the shaft, for example, the alternator of the engine or the ignition system

FIG. 1 presentation of the device; in fig. 2 timing diagram of the device. The device contains a pulse sensor 1, a pulse shaper 2, a level selector 3, a program switch 4, a generator of 5 clock pulses, a system 6 for controlling the operating modes of the engine, a unit 7 for the Vernier generator, a block 8 for the reversible counter and an indicator 9.

The operation of the device is as follows.

Sensor 1 generates signals whose frequency is proportional to the speed of rotation of the shaft, according to which driver 2 generates standard pulses in amplitude and duration (Fig. 2, a). These. the pulses arrive at the input of the level selector 3 and to one of the inputs, for example the second, of program switch A.

At the moment when the motor shaft reaches during acceleration or overrun of a predetermined predetermined speed, the level selector 3 sends a signal to the first input of software switch 4 from its second output, to the third input of which generator 5 pulses are received. At that, software switch 4 gives the output signal , for the duration equal to the time interval At (Fig. 2, b), to the summation control (summing) input of the reversible counter block 8, and after a certain time tno has elapsed, the third output is There is exactly the same time interval allowing the signal to the counter's computing input.

8. In addition, the program switch 4 at its fourth output emits pulses of duration At, and hi-i (Fig. 2, d), corresponding to residual periods within the intervals At in the case of non-multiplicity to the first input of the Vernier 7 generator, to the second input which receives impulses from the imager 2. Block of the vernier generator 7 with this issue of a series of pulses Hl and n, the number of impulses in each of which is proportional to the residuals of the period and At2. (Fig. 2, d)

Thus, during the time intervals At (Fig. 2, b), the pulses n, from the generator 2 (Fig. 2, c) and the pulses n, from the output of the block of the Vernier Generator 7, go to the summing input of the reversible counter unit 8, and the pulses n (Fig. 2, c) and tli pulses (Fig. 2, d) are fed to the subtractive input of the reversing c4eT4tiKa block. At the end of the counting of pulses, the Pg unit of the Vernier Generator 7 sends a signal (FIG. 2, e) to a quarter of the input of the program switch 4 about the end of the counting of pulses.

In the event that any edge of the time interval & i coincides with the corresponding pulse fronts of the former 2, the block of the Vernier Generator 7 is not started and the measurement is not taken.

The division price of the block of the nonius generator 7 and the iiki time interval are chosen in such a way as to take into account the specified;

Claims (2)

and a known acceleration coupling ratio with power so that the result of power measurement is obtained in units of horsepower. At the same time, the difference of two pulse sequences arriving at the summing and subtracting inputs of the reversing counter unit 8, is equal to the engine power, is output to the indicator 9. The system for controlling the operating mode 6 when it reaches a certain speed on the control pad from the first output of the level selector 3 outputs the engine at the acceleration mode (for example, by opening the throttle), and then at the end of the second time interval L (FIG. 2, b), by the signal from the first output of the program switch 4, outputs the 5 jejib to the D they stick out (e.g., by closing the throttle valve) Thus, administration -noniusnogo oscillation device allows to measure not only the whole period, within the interval & t, but also remnants of periods that allows a whole to increase the measurement accuracy. Another advantage of the proposed device is that it can use the engine system as a pulse sensor to carry information about the rotational speed of the engine, such as an alternator or ignition system, to which this device can be connected with simple crocodile clips, without further elaboration. engine, as in the case of using an induction sensor pulses on the engine power shaft. Claim 1. A device for measuring engine power, comprising a pulse sensor associated with a motor under study and connected to a pulse shaper, the output of which is connected to a level selector and one of the program switch inputs, the other two inputs of which are connected respectively to the output of the level selector and The code of the clock pulse generator, and the outputs are connected to the control inputs of a reversible pulse counter 74 ow, the output of which is connected to an indicator, characterized in that, in order to determine the accuracy of It includes a block of a vernier generator and an engine control system, the block of the vernier generator is connected to its inputs with the driver and one of the outputs of the program switch, and the output one with one of the inputs of the program switch and with the counting input of the counter, with which, in turn, is also connected to the output of the forg shrovatel of pulses, and the system for controlling the operating modes of the engine is connected with its inputs to the output of the level selector and the output of the program switch, and the output to the subject engine. 2. An instrument for measuring engine power according to claim 1, characterized in that, in order to simplify the measurement process and increase reliability, it uses an engine system as a pulse sensor that carries information about the angular position of the shaft, such as an engine alternator or a system ignition. Sources of information taken into account in the examination 1.US Patent ff 3817092, cl. 73-133, published. 1974. 2. USSR author's certificate number 314088, cl. G 01 L 23/08, 1969 (prototype). "  / V CNI N-) / V f / /one "NI CNi v  / Mv  A "r j K- tw -Vvl + -0 ;} what -to  "H "five: "I 40 H "3 NJ "si ; Cva t3 do