SU1486844A1 - Apparatus for measuring torque of crankshaft rotation opposition of internal combustion engine - Google Patents

Description

The invention can be used in diagnosing internal2 engines

him burning out. The purpose of the invention is to improve the accuracy and enhanced functionality. In the process of the engine entering the diagnostics mode, signals from sensors 1, 2, 3, 4, operating parameters trigger the logic elements AND 5, 6, 7. The threshold level generator 8 supplies the signal specified for the engine of this type to the non-inverting comparator input on another input which receives a signal from the sensor of the moment of resistance to rotation. The results of the signal comparison are sent to the display unit. 1 il.

5 C „„ 1486844

77

3

1486844

four

The invention relates to the field of operation and can be used in the diagnosis of internal combustion engines according to the moment of resistance to rotation of the crankshaft. five

The purpose of the invention is to improve the accuracy and enhanced functionality.

The drawing shows a block diagram of the device.

The device contains a sensor 1 of the coolant temperature, the sensor 2 of the temperature of the oil in the oil pan, the sensor 3 crankshaft speed and the sensor 4 torque. Temperature sensors 1 and 2 are connected to the inputs of the first 15 element I 5, and speed sensors 3 and torque 4 to the inputs of the second element 6, the outputs of the first 5 and second 6 elements I are connected to the inputs of the third element 7 and its output 20 through the shaper 8 of the threshold signal is connected to the non-inverting input of the comparator 9, the sensor 10 of the moment of resistance to rotation is connected to the inverting input of the latter, and the display unit 11 is connected to the output. 25

The device works as follows.

In the process of the engine going to the specified diagnostic mode, the values of its operating parameters reach a predetermined value, recorded by sensors 1 — coolant temperature, 2 to 30 crankcase oils, 3 — rotational speeds and 4 — torque, and inputs 5 and 6 are signaled whose value exceeds the level of their operation.

In the case of the use of elements And, working at a normalized value of the input signal, such as the 511 series, the sensors are connected to the inputs of the elements And, when using logic elements And with an unstable zone of operation, additional threshold devices of one of the known types are installed.

When the elements And 5 and 6 are triggered, the element And 7 in turn triggers and sends a signal to the driver 8 of its threshold level, for example, a stabilizer with adjustable output voltages corresponding to different motors.

After that, the signal of a given value is fed to the non-inverting input of the comparator 9, to the inverting input of the comparator 9 receives a signal from the sensor 10 of the moment of resistance to rotation of the crankshaft. The comparator 9 compares the magnitudes of the signals from the sensor 10 and the shaper 8 of the threshold signal and, if the threshold level does not exceed the threshold level, sends a corresponding signal to the display unit 11.

Claims (1)

Claim A device for measuring the moment of resistance to rotation of a crankshaft of an internal combustion engine, containing electrically connected sensors of monitored parameters, logic elements And, comparison elements, display unit, characterized in that, in order to increase accuracy and expand functionality, the outputs of the first and second sensors are connected to the inputs of the first element And the outputs of the third and fourth sensors are connected to the inputs of the second element And, the outputs of the first and second elements And connected to the inputs of tert of this element And, the output of which is connected through the threshold signal shaper, to the non-inverting input of the comparator, and a sensor of resistance to rotation to the inverting input of the latter, and a display unit to the output.