RU133930U1 - STAND FOR COMPLEX TESTS OF INTERNAL COMBUSTION ENGINES - Google Patents

Abstract

1. A bench for conducting comprehensive tests of internal combustion engines, containing an asynchronous reversible electric machine (AEM), a torque measuring coupling connected to the AEM by a shaft, an interter to change the load on the internal combustion engine, a loading unit for the consumption of electric energy generated by the AEM, fuel tanks, radiators, battery, intake air purification system, exhaust system, control unit and collecting information from sensors that allow simulating the load on the engine corresponding to the load on the internal combustion engine as part of the vehicle when driving along driving cycles, characterized in that the stand is equipped with gas analysis equipment, an air flow meter and a personal computer with software to control all the systems of the stand. 2. The stand according to claim 1, characterized in that it is equipped with gas analytical equipment, which allows testing for the content of harmful emissions in exhaust gases according to environmental standards Euro-4, Euro-5, Euro-6.

Description

The technical solution relates to engine building, and in particular, to test benches for conducting complex tests of internal combustion engines. A bench for comprehensive engine tests allows the study of gas-dynamic processes to finalize the intake system, cold-scroll the engine, remove load characteristics, external speed characteristics, partial speed characteristics, simulate a driving cycle, and conduct gas analysis studies.

From the prior art, various versions of test benches designed for the study of internal combustion engines are known.

In the application for the invention RU 92003644 (G01M 15/00, publ. 01/27/1995), a scheme of the stand for running the engine and loading it with the conversion of mechanical energy into electrical energy and its transmission to the industrial network is proposed. The essence of the solution lies in the fact that the stand contains a direct current machine, the shaft of which is connected to the motor shaft, a three-position switch, the middle clamp of which is connected to the collector of the electric machine, and the on-board diodes are connected to the extreme clamps, the opposite ends of which are connected to the converter, which provides a change direction of current. A starting rheostat, shunted by a switch, is connected in series with the armature circuit of the electric machine in series with the collector. The converter is made as a group (one on several stands) and is directly connected to the industrial network.

In the invention RU No. 2055339 (G01M 15/00, publ. 02.27.1996) a method for increasing the efficiency of the test bench. The essence of the invention lies in the fact that the tested internal combustion engine is connected to the shaft of a single-arm converter, the contact rings of which are connected to the industrial network through a passive synchronizer. The collector of a single-anchor converter is connected via a switch to a voltage regulator.

In US patent No. 6539782 (G01L / 326; G01L / 1708 publ. 04/01/2003) a circuit of an electric machine for loading an internal combustion engine is proposed, comprising an electric DC machine and an electric load.

The invention proposed in US Pat. No. 4,335,619 (GL01L / 22 publ. 06/22/1982) provides a test bench circuit comprising an asynchronous motor-generator, a load device, a device for measuring torque, speed, gearbox and a bench control system. The motor shaft is connected to the asynchronous motor-generator through a gearbox, between them a speed and torque meter is installed on the shaft. The motor generator is connected to a load device, the joint operation of which is provided by the control system.

The closest analogue selected as a prototype is a test bench for testing an internal combustion engine, considered in utility model RU 66047 (G01M 15/00, publ. 08.27.2007), the test bench consists of a load and control device, a control unit, an engine speed sensor internal combustion, the torque sensor of the internal combustion engine, and the load device is made in the form of an asynchronous electric motor, the shaft of which is mechanically connected to the shaft of the tested internal combustion engine, the shaft of which is equipped with a rotational speed sensor of the internal combustion engine and a torque sensor.

All the above inventions and the prototype, including allow partial tests of internal combustion engines. However, their functionality does not allow comprehensive testing of the main systems and the entire engine as a whole. Thus, the lack of gas analytical equipment does not allow testing for the content of harmful emissions in the exhaust gases of the internal combustion engine. In addition, the lack of a personal computer and a control unit do not allow simulating the driving cycle of the internal combustion engine in the vehicle.

The task set in the utility model is to increase the functionality of the test bench for conducting complex tests of internal combustion engines according to modern world-class standards.

The technical result consists in providing a large number of parameters, including gas analysis tests, which can be determined during the internal combustion engine tests, load characteristics, external speed characteristics, partial speed characteristics can be taken, the engine is cold-scrolled and the driving cycle simulated.

The essence of the utility model is that a bench for conducting comprehensive tests of internal combustion engines, containing a torque measuring coupling connected by a shaft to a reversible asynchronous electric machine (AEM), an inverter for changing the load on the internal combustion engine, a loading unit for consumption by the generated asynchronous machine electrical energy, gas analytical equipment for conducting research on the toxicity of exhaust gases, air flow meter to determine ying cylinders, fuel tanks for supplying fuel to internal combustion engines, radiators for internal combustion engine cooling system, the battery for starting the internal combustion engine system control unit and collecting information from the sensors and a personal computer with software to manage all the systems of the stand. All nodes and systems of the stand are mounted on the frame.

In addition, another difference is that:

- due to gas analysis equipment, exhaust gas studies are conducted for toxicity and environmental compliance.

- an asynchronous electric machine together with an inverter, a loading unit and a control system allows you to simulate a car’s driving cycle, which allows using gas analysis equipment to conduct environmental tests of ICE according to Euro-4, Euro-5, Euro-6 standards.

The technical result is achieved by the fact that with this design of the test bench for conducting complex tests of internal combustion engines, it is possible to study both individual elements and systems of internal combustion engines, and the entire internal combustion engine in all possible operating modes.

A useful model of the test bench for conducting complex tests of internal combustion engines is illustrated in the drawing, which shows a block diagram of a test bench for conducting complex tests of internal combustion engines (the dashed line surrounds the test bench elements).

The bench for conducting comprehensive tests of internal combustion engines consists of a frame on which are mounted: a torque measurement coupling through an intermediate shaft is connected to an asynchronous electric machine, a loading unit is connected to the AEM via an inverter, a control unit and collecting information from sensors controls the loading unit and AEM for providing a given loading cycle, and the loading unit converts the produced electrical energy into heat. The air mass meter is installed after the intake air purification system. ICE support systems are installed on the frame: fuel tanks, cooling radiators, intake air purification system and exhaust system. The control unit and the collection of information from sensors allows you to obtain values from engine sensors and determine their value.

The stand works as follows. For testing the internal combustion engine, the internal combustion engine is installed on the stand, the engine sensors are connected to the control unit and collecting information from the sensors, the power system is connected to the fuel tanks, the cooling system is connected to the radiator. The intake manifold of the internal combustion engine is connected to the intake air purification system, and the exhaust manifold to the stand exhaust system. The engine control unit is connected to the control unit and the collection of information from sensors, with the help of which the internal combustion engine is controlled and connected to the battery.

Using software on a personal computer, the mode or cycle of loading the internal combustion engine is set and the control parameters of the internal combustion engine are set, and the internal combustion engine is started. Gas analysis equipment gives the values of the content of harmful emissions. The parameters and characteristics of the internal combustion engine are displayed on a personal computer.

Claims (2)

1. A bench for conducting comprehensive tests of internal combustion engines, containing an asynchronous reversible electric machine (AEM), a torque measuring coupling connected to the AEM by a shaft, an interter to change the load on the internal combustion engine, a loading unit for the consumption of electric energy generated by the AEM, fuel tanks, radiators, battery, intake air purification system, exhaust system, control unit and collecting information from sensors that allow simulating the load on the engine, corresponding to the load on the internal combustion engine as part of the vehicle when driving on driving cycles, characterized in that the stand is equipped with gas analysis equipment, an air flow meter and a personal computer with software to control all the systems of the stand. 2. The stand according to claim 1, characterized in that it is equipped with gas analytical equipment, which allows testing for the content of harmful emissions in exhaust gases according to environmental standards Euro-4, Euro-5, Euro-6.

Images