SU1370275A1 - Device for measuring detonation in internal combustion engine - Google Patents

Abstract

The invention relates to the monitoring of the characteristics of an internal combustion engine and can be used to measure the detonation in systems for automatically limiting the detonation of an internal combustion engine. The aim of the invention is to improve the accuracy of the detonation measurement in an engine. To achieve this goal, a delay element 6, an integrator 8 and a sample element 9 - storage are additionally introduced into the device. In addition, the device contains: a detonation sensor 1, an engine stroke extraction unit 2, a switch 3, amplifiers 4 and 7. The device compares the signal taken from sensor 1 during the engine stroke, when detonation is possible, with a noise background of the engine measured in modes where detonation is not possible. - 1 il. i (L

Description

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This invention relates to the monitoring of the characteristics of an internal combustion engine and can be used to measure detonation in automatic detonation systems for the days of internal combustion engines.

The aim of the invention is to improve the accuracy of the measurement of detonation in an internal combustion engine.

The drawing shows the functional scheme of the proposed device.

A device for measuring detonation in an internal combustion engine comprises a detonation sensor 1, an engine stroke separation unit 2, a key 3, a first amplifier 4, a comparator 5, a delay element 6, a second amplifier 7, an integrator 8 and a sample-storage element 9. The signal input of the key 3 is connected to the output of the knock sensor 1. The input of the first amplifier 4 is connected to the output of the key 3, and the output of the amplifier 4 is connected to the first

in order to time out the control of the integrator 8 and the sample-storage element 9. When key 3 is open to the first input of the comparator 5, the signal from the knock sensor 1 is amplified by the first amplifier 4. If the signal from the knock sensor 1 exceeds the level of the reference signal of the comparator 5,

At the output of comparator 5, a signal is generated that characterizes the detonation. At the end of the working stroke, the engine stroke extracting unit 2 generates a signal with the level O. At

In this case, the key 3 is closed, the integrator 8 switches to the integration mode, and the sample-storage element 9 switches to the sampling mode. Pa input of the integrator 8 through the second amplifier 7

Steps signal from the knock sensor 1. At the output of the integrator 8, a signal is generated that is proportional to the noise level of the internal combustion engine and is not related to detonation. When you follow

the input of the comparator 5. The output of the comparative working stroke of the engine is

torus 5 is the output of the device. The input of the second amplifier 7 is connected to the output of the knock sensor 1, and the output of the second amplifier 7 is connected to the signal input of the integrator 8. The signal is 30 engine running time, when

the input of the sample-storage element 9 is connected to the output of the integrator 8, the control input is connected to the output of the engine stroke separation unit 2, and

detonation may occur, with the noise background of an internal combustion engine (depending on rotational speed, load and a number of other factors), due to

the output of the sample-storage element 9 is measured on the modes when the detonation

It is uniform with the second input of the comparator 5. It is impossible.

The input of delay element 6 is connected to

the output of block 2 of the working

the course of the engine, and the output element 6

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Claims (1)

Invention Formula the delays are connected to the control, the key input 3 and the reset input of the integrator 8. The device works in the following way. During the engine stroke, the engine stroke extraction unit 2 generates a signal 1, which sets the sample-storage element 9 to the storage mode, and at its output the signal recorded in it during the previous engine cycles is stored. This signal is the reference signal for comparator 5. After some time, determined by the delay element 6, the output of the delay element 6 also generates a signal 1, which opens the key 3 and sets the integrator 8 to 0. A delay element 6 is required for A device for measuring detonation in an internal combustion engine, comprising a detonation sensor, an engine stroke detection unit, a key, a first and second amplifiers, and 45 is a comparator, the first input of which is connected to the output of the first amplifier, the output of the knock sensor is connected to the signal input of the key, the output of which is connected to the input of the first amplifier 50 bodies, characterized in that, in order to improve the accuracy of detonation measurement in an internal combustion engine, a delay element, an integrator and a selection element 55 are added to the internal combustion engine, the signal input of which is connected to the integrator output, the output to the second comparator input, and the input control - with the output of the engine stroke selection unit and the signal becomes the reference for comparator 5. Thus, the device compares the signal taken from the knock sensor 1 during Invention Formula A device for measuring detonation in an internal combustion engine, comprising a detonation sensor, an engine stroke detection unit, a key, a first and second amplifiers, and a comparator, the first input of which is connected to the output of the first amplifier, the output of the knock sensor is connected to the signal input of the key, the output of which is connected to the input of the first amplifier Bodies, characterized in that, in order to improve the accuracy of detonation measurement in an internal combustion engine, a delay element, an integrator and a sample-storage element are introduced into the engine, the signal input of which is connected to the integrator output, the output to the second comparator input, and the control input with the output of the engine stroke selection unit and 31370275 the input of the delay element, the output of which is the output of the second amplifier, whose input is connected to the control input of which is connected to the output of the key sensor and the reset input of the integrator, detonation, and the device output whose signal input is connected to. , is the output of the comparator.