RU2147748C1 - Device for measurement of acceleration of internal combustion engine crankshaft - Google Patents

Abstract

FIELD: instrument engineering, applicable for measurement of parameters associated with acceleration of crankshaft of internal combustion engines in service. SUBSTANCE: the device has a variable-induction pickup, pulse shaper, reversible counter and an indicator. The device uses a nominal speed memory unit, control unit, time pulser and a subtraction delay unit for the time of the cycle. EFFECT: enhanced accuracy of measurement. 1 dwg

Description

 The invention relates to the field of instrumentation and can be used to measure parameters associated with the acceleration of the crankshaft of internal combustion engines in operating conditions.

 A device for determining the relative change in rotational speed [1], comprising a rotational speed sensor, two blocks for extracting extreme speed values, a subtraction unit, a division unit and a reading device.

 The closest in technical essence is a speed meter of the shaft of an internal combustion engine [2], containing an inductive sensor, the output of which is connected to the input of the shaper, a reversible counter and an indicator.

 A disadvantage of the known device is the low accuracy of the measurements, since the processes occurring in the engine during its operation are not properly taken into account.

 The alleged invention solves the problem of improving the accuracy of measurement.

 To achieve this technical result, a nominal revolving fixation block, a control unit, a temporary pulse generator, a computing device and a subtraction delay unit for a cycle time are introduced into the instrument circuit, while the output of the forming device is connected through a nominal revolving fixation block to the input of a subtraction delay block for a cycle time , the outputs of the forming device, the unit for fixing the nominal revolutions, the unit for delaying the subtraction for the duration of the cycle and the generator of temporary pulses are connected to the corresponding inputs s control unit, which output through down counter and a computing device connected to the indicator.

 The drawing shows a block diagram of the proposed device.

 A device for measuring the acceleration of the crankshaft of internal combustion engines contains an inductive sensor 1 connected through a forming device 2 and a unit for fixing the nominal speed 3 to the subtraction delay unit 4. The outputs of the forming device 2, the unit for fixing the nominal speed 3, the unit of subtraction delay for the duration of cycle 4 and a time pulse generator 5 is connected to the corresponding inputs of the control unit 6, which is connected through a reversible counter 7 and a computing device 8 to an indicator 9.

 A device for measuring the acceleration of the crankshaft of internal combustion engines works as follows. When the engine is running, the pulses from the output of the inductive sensor 1 through the forming device 2 are sent to the nominal speed fixing unit 3. When the engine reaches the rated speed using the fixing unit 3 and the control unit 6, the reversible counter 7 is switched on. It is set for a certain period of time, set by the generator time pulses 5, sums the pulses received from the inductive sensor 1. At the same time as the reversing counter, when the engine reaches the rated speed, the delay delay unit is activated reading for the cycle time 4. He counts the number of pulses corresponding to the cycle time (two revolutions of the crankshaft). And after this time, he turns on the reverse counter 7 in the subtraction mode. The pulses are subtracted for the same period of time as the summation. The difference thus obtained, proportional to the acceleration of acceleration of the crankshaft, enters through the computing device 8 to the indicator 9.

Sources of information taken into account during the examination
1. USSR author's certificate N 871075, cl. G 01 P 15/00, 1981.

 2. Copyright certificate of the USSR N 1334939, cl. G 01 P 3/56, 1991 (prototype).

Claims (1)

 A device for measuring the acceleration of the crankshaft of an internal combustion engine, comprising an inductive sensor, the output of which is connected to the input of the forming device, a reversible counter and an indicator, characterized in that a nominal speed fixing unit, a control unit, a time pulse generator, a computing device and a unit are introduced therein subtraction delays for the duration of the cycle, while the output of the forming device is connected through the nominal speed fixing unit to the input of the subtraction delay unit for the cycle time, output The odes of the forming device, the unit for fixing the nominal revolutions, the unit for delaying subtraction for the duration of the cycle, and the generator of time pulses are connected to the corresponding inputs of the control unit, the output of which is connected to the indicator through a reversible counter and a computing device.