SU1741107A1 - System of regulation of rotational speed of internal combustion engine shaft - Google Patents

Abstract

The invention relates to controlling the rotational speed of a heat engine. The purpose of the invention is to improve the accuracy of regulation. The goal is achieved by introducing into the system a position sensor of the rack and pinion mechanism of the fuel-supplying organ 10 and the adder 1. Moreover, the signals from the sensor 10, from the first 4 and second 9 rotation speed sensors and the input signal are summed with the corresponding weighting factors at the input of the adder 1. in the control circuit of the master motor. 2 Il.

Description

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The invention relates to the regulation of internal combustion engines (ICE), in particular diesel engines, and in particular to a system for controlling the frequency of rotation of the shaft

diesel engine

A known system for regulating the frequency of splicing an ICE shaft, comprising a fuel-supplying organ, is mechanically connected via a reducer to the ICE shaft, a rotational speed sensor mounted on the ICE shaft, an adder.

The disadvantage of this system is low control accuracy.

A known system for regulating the frequency of rotation of an internal combustion engine shaft, comprising a fuel-supplying organ, mechanically connected through a reducer to the internal combustion engine shaft, a rotational frequency sensor mounted on the internal combustion engine shaft, an adder, a power amplifier,

The specified systems do not provide rshsoky accuracy and reliability.

A known system for controlling the frequency of rotation of an engine shaft, comprising a hop-water-deforming organ, a differential, a driver motor, the shaft of which is rigidly connected to the input gear of the differential 13, the first and second speed sensors installed respectively on the shaft of the driver motor and on the output shaft of the internal motor. rozhich, the first redumor is connected with the vagal gear of the differential, which is meshed with the rack-and-pinion mechanism, the Kiow fuel and the dosing organ, the power amplitude, the output of which 1h unplugged output terminals of the driving motor, an adder whose output is connected to the input of the power amplifier and the first input - to the output of the first speed sensor, wherein the internal combustion engine output shaft through a second gear coupled to the input shaft top- livodoziruyuschego body. A characteristic feature of this system is the use of a differential as an adder of setpoint signals and feedback on the frequency of rotation of the motor shaft, as well as the implementation of a driver using an electric motor.

However, the known system does not allow for increased demands for flow and control speed, this system is described by a third-order differential equations system, and according to modal control theory, to obtain given dynamic properties of this considered control system with a predetermined distribution of the roots of the characteristic equation

less than three feedbacks on the main three variable coordinates: the frequency of rotation, the driver motor, the diesel engine, and the position of the fuel-dosing unit.

The purpose of the invention is to increase the accuracy and speed of controlling the frequency of rotation of the diesel engine shaft by imposing an additional reverse

communication on the position of the fueling body.

This goal is achieved by haem, that in the system for regulating the frequency of rotation of the shaft of an internal combustion engine, which contains a topivodosatuyu organ, the differential, the drive motor, the shaft of which is rigidly connected to the input gear of the differential, the first and second rotational speed sensors installed

respectively, on the driver motor shaft and the internal combustion engine output shaft through the first gearbox connected to the output gear of the differential mechanically connected to the rack and pinion mechanism of the fuel-powering oogen power amplifier, the output of which is connected to the output terminals of the driver-motor, the adder, output that is connected to the output terminal of the driver-to-motor motor, the adder, which is connected to the output motor of the master motor the power amplifier and, and the first input to the output of the first rotational speed sensor, the output shaft of the internal combustion engine through the second gearbox is connected to the input the additional shaft of the fuel-supplying organ, additionally inserts a position sensor of the rack-and-pinion mechanism of the fuel-supplying organ, the second and third inputs of the adder are connected respectively to the outputs of the second rotational speed sensor and the sensor

the position of the operating mechanism of the fuel dosing organ; and the fourth inlet is the inlet of the system.

Fig. 1 is a structural diagram of the proposed control system; on

Fig. 2 is a kinematic diagram of the regulation system.

The system contains an adder 1, a power amplifier 2 that drives the electric motor 3. The first sensor is located on the shaft

4 rotational speeds and a differential 5, one of the gears of which is connected to the shaft of the driver motor 3. Another gear through the first gearbox 6 is connected to the shaft of an adjustable internal combustion engine 7, and the differential carrier is pinned to the high water supplying body 8 of the high pressure fuel pump, which drives via second gearbox 9

The electrical control circuit of the master motor 3, in addition to the named adder 1, power amplifier 2, sensor 4, contains the second sensor 10 of the rotational speed of the engine shaft, sensor 11 of the position of the fuel-inducing body (fuel pump rail). The rotational speed sensors 4 and 10 are made in the form of tachogenerators. A potentiometric sensor is used as a sensor for the position of the toplivoses organ.

The control system works as follows.

The signals of the task and feedbacks taken from the three sensors 4, 10, 11 are summed at the input of the summing electronic amplifier 1 with the corresponding weighting factors. The obtained voltage value is amplified in a multi-stage power amplifier 2 and fed to the control circuit of the driver motor 3. In the mechanical differential, the rotational speeds of the drive motor 3 and the controlled internal combustion engine are compared. specified mismatch. When starting the internal combustion engine at the initial time, the signal from sensor 4 is maximum, it corresponds to the maximum torque and maximum speed of the engine, relative to the engine shaft, which causes the differential driver to move the fuel supply unit to the position corresponding to the maximum fuel supply. As the misalignment of speeds decreases, the carrier of the differential moves the heating body towards lower fuel consumption.

Studies have shown that the proposed system for regulating the frequency of rotation of the shaft of the internal combustion engine has the best dynamic performance compared to its counterpart, which allows an increase in the fuel efficiency of engines in operation by 3-5%.

Claims (1)

Invention Formula A rotational speed control system for an internal combustion engine motor, comprising a fuel supply unit, a differential, a driving motor, the shaft of which is rigidly connected to the input motor. the gear wheel of the differential, the first and second rotational speed sensors, installed respectively on the shaft of the driver motor and on the output shaft of the internal combustion engine, through the first a gearbox connected to an output gear of a differential mechanically connected to a rack and pinion mechanism of a fuel-supplying organ, a power amplifier whose output is connected to the output terminals of the master motor, an adder whose output is connected to the input of the power amplifier, and the first input to the output of the first rotational speed sensor, wherein the output shaft of the internal combustion engine is connected through the second gearbox to the input shaft of the fuel-supplying organ, characterized in that, in order to increase the regulation accuracy, it will add flax introduced rack position sensor mechanism toplivodoziruyuschego body, second and third inputs of the adder are respectively connected to the outputs of the second sensor the rotational speed and position of the rack and pinion mechanism sensor toplivodoziruyuschego organ, and the fourth input is the system input.