RU2372517C1 - Diesel fuel equipment test bench - Google Patents

Abstract

FIELD: engines and pumps.

SUBSTANCE: diesel fuel equipment test bench consists of a frame with a plate mounted thereon and meant for fuel injection pump to be installed on it, a drive, an atomiser, fuel feeding system and measuring devices of capacity, non-uniform fuel supply and phase parametres of pump sections, which are connected to data management and processing system. Measuring devices of capacity and non-uniform fuel supply are made in the form of a flow metre located after the atomiser in the direction of fuel flow. Phase parametre measuring devices are made in the form of pressure sensor installed between the measured pump section and atomiser, and angular displacement sensor connected to the drive shaft. Pressure sensor, atomiser and flow metre are combined in a single measuring channel made with the possibility of being connected to each section in turn. Between fuel injection pump and measuring channel of the bench there installed in HP line is the device allowing to consequently and automatically connect each delivery section of fuel injection pump to the measuring device. The rest sections are connected to the drain.

EFFECT: reducing energy consumption required for adjustment of fuel injection pumps, increasing inter-section measuring accuracy of their parametres, decreasing labour input of works.

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Description

The invention relates to the field of testing diesel fuel equipment (TA) of internal combustion engines (ICE). The invention allows to reduce energy consumption for adjusting high pressure fuel pumps (TNVD), to increase the intersectional accuracy of measuring their parameters, to reduce the complexity of the work.

A known single-channel method for testing high-pressure fuel pumps and a device for its implementation, comprising a frame with a plate mounted thereon for installing a high-pressure fuel pump, a drive, a nozzle, a fuel supply system and means for measuring productivity, unevenness of fuel supply and phase parameters of pump sections associated with information management and processing system, means of measuring the performance and unevenness of fuel supply are made in the form of a flow meter, located after e nozzles along the fuel flow, and phase measuring instruments are made in the form of a pressure sensor installed between the measured pump section and the nozzle, and an angular displacement sensor associated with the drive shaft, while the pressure sensor, nozzle and flow meter are combined into one measuring channel, made with the possibility of alternately connecting to each section [1].

The disadvantage of this device is the high complexity and low intersectional measurement accuracy when testing TA and high energy consumption.

The aim of the invention is to increase productivity, accuracy and reduce the complexity of the adjustment work TA auto diesel engines and reduce energy consumption. This goal is achieved by the fact that between the measuring channel of the stand and the high pressure fuel pump along the high pressure line, a device is installed that allows sequentially and automatically connecting each injection section of the high pressure fuel pump to the nozzle with a measuring device, while the remaining sections are connected to the drain to reduce the load on the high pressure pump drive bypassing the nozzle.

Figure 1 presents a diagram of the stand.

Figure 2 shows a view aa of figure 1.

In Fig.3 shows a view of BB of Fig.1.

The stand consists of a frame 1, drive 2, a fuel supply system 3, including a fuel tank, a booster pump, pressure sensors (not shown in the figure), a measuring channel 4, which contains a pressure sensor 5 sequentially arranged along the fuel flow, a reference nozzle 6 and a fuel flow meter (not shown in the figure). Injection pump 7 is connected by a drive 2 to an electric motor 8, on which a speed sensor 9 is mounted. The second motor 10, equipped with a sensor 11 of angular displacements, rotates the spool 12 in the distributor 13 (figure 2), which is connected by high pressure pipelines to the measuring channel 4 and the injection pump 7. The spool 12 has a central channel 14, and in the distributor 13 input and output channels 15 and 16, respectively. The work of the stand is carried out under the control of a personal computer 17 connected to the control unit 18, to which control and signal circuits of electric motors 8 and 10, fuel supply system 3, measuring channel and sensors are connected.

The principle of operation is as follows. Fuel from the high-pressure fuel pump 7 at high pressure enters the distributor 13 (figure 2). The operator on the computer 17 sets the injection section of the injection pump 7. The control unit 18 by means of the electric motor 10 sets the spool 12 of the distributor 13 so that the input channel 15 of the selected section is compatible with the central channel 14 of the spool 12 (Fig.2). In this case, the fuel under high pressure through the central channel 14 goes through the output channel 16 to the reference nozzle 6. The remaining injection sections at this time through the U-shaped groove on the spool 12 are connected to the drain in the tank and do not create resistance to rotation of the actuator 2, which leads to reduce energy costs. After completing the measurement at the command of the computer 17, the control unit 18 by means of an electric motor 10 rotates the spool 12, switching the injection pump 7 to the measurement of another section. Due to the automatic switching of the injection section of the injection pump, the complexity is significantly reduced, while there is no need to stop the drive, thereby not violating the high-speed mode of the injection pump 7, which significantly increases the intersection accuracy of measurements.

Information sources

1. Patent No. 2289720, F02M 65/00. Method for testing high pressure fuel pumps and device for its implementation. Soloviev R.Yu., Sergeev N.N., Betin V.N. Declared July 30, 2004, published January 27, 2006.

Claims (1)

A test bench for diesel fuel equipment, comprising a frame with a plate mounted on it for installing a high-pressure fuel pump, a drive, a nozzle, a fuel supply system and means for measuring productivity, uneven fuel supply and phase parameters of pump sections associated with an information management and processing system, means measurements of the performance and unevenness of the fuel supply are made in the form of a flow meter located after the nozzle along the fuel flow, and phase measuring instruments The parameters are made in the form of a pressure sensor installed between the measured pump section and the nozzle, and an angular displacement sensor associated with the drive shaft, while the pressure sensor, nozzle and flow meter are combined into one measuring channel, made with the possibility of alternating connection to each section, different in that a device is installed between the high pressure fuel pump and the measuring channel of the test bench along the high pressure line, which allows each injection pump section to be connected in series and automatically to the device, while the remaining sections are connected to the drain.

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