RU2589973C2 - Determination of ice output at acceleration - Google Patents

Abstract

FIELD: engines and pumps.

SUBSTANCE: one-type engines of known effective output are subjected to unbracked tests. Maximum electric pulse magnitude (voltage, current or power) developed by the transducer is registered by appropriate electrodynamic meter for every engine of the group. Note here that the function of maximum pulse magnitude at the engine effective power is found. Then, maximum magnitude of the primary transducer is defined at the test of any other engine of the same type under the same testing conditions. Results obtained with application of said function are used to define the effective power of one separate engine. This allows the application of standard electrodynamic meters, i.e. ammeter, voltmeter or wattmeter, at unbraked tests of the engines.

EFFECT: simple and efficient process.

1 dwg

Description

The invention relates to the field of testing and technical diagnosis of machines, in particular to a method for determining the effective power of internal combustion engines.

A known method for determining the effective power when braking a diesel engine to the nominal mode by the partial method. To do this, use, for example, hydraulic loaders (throttles, flow meters) (Alliluyev V.A. Workshop on the operation of the machine and tractor park / V.A. Alliluyev, A.D. Ananyin, A.Kh. Morozov. - M.: Agropromizdat, 1987, p. 19-21) [1].

The disadvantages of this method include: the complexity of practical implementation, high complexity and the need for expensive devices.

The closest technical solution, selected as a prototype, is a method of non-brake tests of an internal combustion engine, in which the engine is prepared for testing, a primary converter is installed on it, to which a measuring device is connected, the engine is started and warmed up, then it is tested during acceleration. To do this, set the maximum speed of the engine shaft, turn off the fuel supply and when the minimum speed is reached, the fuel lever is sharply moved to the maximum feed position, and at the same time the controlled parameters are recorded (Alliluyev V.A. Workshop on the operation of the machine-tractor park / V.A. Alliluyev, A. D. Ananyin, A. Kh. Morozov. - M .: Agropromizdat, 1987, p. 26-31) [2].

The disadvantage of this method is that its implementation requires a difficult-to-use and expensive electronic device such as IMD-C (digital engine power meter).

The objective of the invention is to provide a simple and affordable way to determine the effective power of an internal combustion engine based on brake-free tests.

The invention consists in the following. They conduct brake-free tests of a group of engines of the same brand with a known effective power in advance, which is in the range from minimum to maximum value. For each engine in this group, by means of an electrodynamic measuring device, the electric pulse of the converter is recorded during acceleration of the engine — when the engine speed changes from minimum to maximum value. Moreover, the electrical impulse is fixed in the form of the maximum value of one of the parameters: electric voltage or current, or power. In this case, find the function of the maximum pulse value of the named converter from the effective engine power. Then determine the maximum value of the pulse of the primary Converter when tested in the same mode, any other engine of the same brand. According to the results obtained, using the specified function, determine the effective power of a single test engine. As a result, it seems possible to create a simple and affordable way to determine the effective power of an internal combustion engine based on brake-free tests.

The drawing shows a method for determining the effective power of an internal combustion engine during acceleration, where I _Pmax is the maximum value of the electric pulse of the Converter; N _e is the effective power of the internal combustion engine; N _emin , N _emax - the minimum and maximum value of N _e ; ΔN _e is the interval of variation of N _e ranging from N _emin to N _emax ; I _Пmax = f (N _e ) - dependence of the maximum value of the electric pulse of the primary converter on the effective motor power N _e . Here, the dotted arrows give an example of the determination of N _e at a known value of I _{P max} .

Practically the proposed method can be implemented in the following order. Brakeless tests are carried out on a group of engines of the same brand with a predetermined effective power N _e ranging from the minimum N _emin to the maximum N _emax value. For each engine in this group, by means of an electrodynamic measuring device (ammeter, voltmeter, or wattmeter), the electric pulse of the converter is recorded during acceleration of the engine — when the engine speed changes from minimum to maximum value.

The specified Converter is an electromagnetic system device containing a permanent magnet with an inductor. It is installed opposite the gear ring of the flywheel. During engine testing, when the flywheel rotates, pulses are generated as a result of the interaction of the flywheel ring gear with the converter. In this case, the mechanical energy of the rotational movement of the engine crankshaft through the flywheel crown is partially converted by the electromagnetic system of the converter into electrical energy. Thus, when creating an impulse, the engine rpm is used. In this case, the converter receives input pulses through the gear ring of the flywheel. Since the test is carried out during the acceleration of the engine, the duration of which depends on the effective power of this engine, the input pulse also depends on the effective power.

The electric pulse is fixed in the form of a maximum value of I _{P max of} one of the parameters: electric voltage or current strength or power. In this case, find the function of the maximum pulse value of the named converter from the effective engine power: I _Пmax = f (N _e ). In FIG. for example, it is shown by a straight oblique line. Then determine the maximum value of the pulse of the primary Converter when tested in the same mode, any other engine of the same brand. According to the results obtained, using the specified function, determine the effective power of a single test engine, as shown in the drawing by dashed arrows.

As a result, it seems possible to use generally available (standard) electrodynamic measuring instruments: ammeter, voltmeter, or wattmeter for non-brake engine tests. This allows you to create a simple and affordable way to determine the effective power of an internal combustion engine based on brakeless tests and thereby reduce labor costs and funds for diagnosing machines.

INFORMATION SOURCES

1. Alliluyev V.A. Workshop on the operation of the machine-tractor park / V.A. Alliluyev, A.D. Ananyin, A.Kh. Morozov. - M .: Agropromizdat, 1987, p. 19-21.

2. Alliluyev V.A. Workshop on the operation of the machine-tractor park / V.A. Alliluyev, A.D. Ananyin, A.Kh. Morozov. - M .: Agropromizdat, 1987, p. 26-31 is a prototype.

Claims (1)

A method for determining the effective power of an internal combustion engine during acceleration, in which the engine is prepared for testing, a primary converter is installed on it, to which a measuring device is connected, the engine is started and warmed up, then it is tested during acceleration, at which the maximum shaft speed is set the engine, turn off the fuel supply and when the minimum speed is reached, sharply move the fuel lever to the maximum feed position, and At the same time, monitored parameters are recorded, characterized in that tests are carried out on a group of engines of the same brand with a known effective power in the range from minimum to maximum values at which the electric pulse of the converter is recorded for each converter from this group by means of an electrodynamic measuring device during acceleration engine - when changing the engine speed from minimum to maximum values, and the electric imp LSS is fixed in the form of the maximum value of one of the parameters, electric voltage or current, or power, while finding the function of the maximum value of the impulse of the named converter from the effective engine power, then determine the maximum value of the pulse of the primary converter when testing any other engine in the same mode the same brand, according to the results obtained, using the specified function, determine the effective power of a single tested engine.

Images