SU1352258A1 - Method of determining degree of load of supercharged internal combustion engine - Google Patents

Abstract

The invention relates to a measurement technique and makes it possible to improve the accuracy of determining the degree of engine load. With the help of sensors, the rotational speeds of the shafts of the engine and turbocharger are measured, the measurement results are processed in the arithmetic unit in accordance with the given analytical expression, and the obtained value is recorded using the display unit. 1 il. SL

Description

1135

The invention relates to a measurement technique and can be used to determine the load on an internal combustion engine with a gas turbine supercharger.

The purpose of the invention is to increase the accuracy of tee.

FIG. Figure 1 shows a graph of the degree K of engine load versus the frequency of rotation of the compressor shaft; figure 2 - structural diagram of the device implements the proposed method.

The device contains a sensor 1 frequency of rotation of the shaft. Turbocharger and sensor 2 frequency of rotation of the shaft

The basis of the proposed method of the engine connected to the arithmetic unit 3, the output of which is connected to the block 4 display.

The method for determining the degree of load of an internal combustion engine with 20 turbocharges is carried out in the following manner.

Using sensors 1 and 2, respectively, the frequencies of the CO, the motor shaft shafts and the turbo compressor are measured, and the measurement results are processed in the arithmetic unit 3 in accordance with the analytical expression

to determine the degree of K loading the internal combustion engine with turbocharging laid the experimentally established fact of a linear dependence of the power N. of the engine on the frequency

- WITH

WITH the rotation of the shaft of the turbocharger at a given frequency with the rotation of the engine shaft.

The presence of this linear dependence is a consequence of the dependence of the power on the shaft of the gas turbine on the energy of the exhaust gases, which is determined by the frequency 63 of the rotation of the engine shaft and its power N.

thirty

(4), and the value obtained is recorded using the display unit 4.

The degree K of engine load is defined as the ratio

I1

M

(one)

 where Ma and M are the torque values on the motor shaft, corresponding to the current and 100% load

engine

And

Ls with

M

(2)

where is nj. and SOC, respectively, the engine power and the rotational speed of its shaft at maximum load. Insofar as

e-co

mk

N

CH

 e

С0т, „

(3)

where e is a constant for a given engine, then expression (1) can be written as

WITH

ti

t

He sb

(four)

The method for determining the degree of loading of a turbocharged internal combustion engine is implemented using a device whose structural diagram is depicted in FIG. 2

The device contains a sensor 1 frequency of rotation of the shaft. Turbocharger and sensor 2 frequency of rotation of the shaft

(4), and the value obtained is recorded using the display unit 4.

F. formula of invention

The method for determining the degree of load of an internal combustion engine with turbocharging, which consists in measuring the frequency of the engine rotational engine speed CO, judging by the magnitude of which the engine loading degree K is measured, is measured by the fact that, in order to improve accuracy, frequency with t- ,. rotation of the turbocharger shaft, and the engine loading degree K is determined from the analytical expression

To

WITH,

with,

with

 tkn

ABOUT

where COY and CO - .., - shaft rotation speed

M TC ((

with the engine and turbocharger at maximum engine load.

0.25

0.50 0.75

1

1.0

Editor M. Petrov

Compiled by A. Amakhanov Tehred A. Kravchuk

Order 5555/37 Circulation 776 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4U5

Production and printing company, Uzhgorod, st. Project, 4

FIG. 2

Proofreader G. Reshetnik

Claims (1)

Claim A method for determining the degree of loading of a turbocharged internal combustion engine, which is; that they measure the frequency of rotation of the motor shaft, the value of which is used to judge the degree of engine load K, which is different from the fact that, with 40 in order to improve accuracy, additionally measure the frequency ω _{Τ (} , the rotation of the turbocharger shaft, and the degree of engine load K is determined from the analytical expression 45 ν - ^ω τκ ton “weights ω 'where Cd _u and cd ,, are the shaft speeds. respectively engine and turbocharger at maximum load 50 engine.