SU1562511A1 - Apparatus for measuring cyclic feed of fuel - Google Patents

Abstract

The invention relates to engine construction for use in testing diesel fuel equipment and improves the performance of a cycle feed metering device. The device comprises a measuring cylinder 6 with a piston 7 installed with the possibility of axial movement from the initial position and connected with the rod 8 and the movement indicator 10, the test pump 2 connected with the measuring cylinder 6, the solenoid valve 11 of the discharge line 12, the injection number 13 counter , an injection sensor 14 and a means for determining the origin of injections, made in the form of an additional sensor 15 for moving the piston 7. The fuel from the tank 1 is pumped through the pump 2 to the nozzle 4 and through the measuring cylinder 6 and the valve 11 falls into the drain line 12. When the valve 11 closes, fuel accumulates in the measuring cylinder 6, which causes the piston 7 to move upwards, at a given time instant the count of the number of injections is turned on and the meter 10 starts measuring the movement of the piston 7. After the specified number of injections, the counter 13 gives a signal to stop the measurement and open the valve 11. The measurement result is recorded on the information board. 3 il.

Description

FIELD OF THE INVENTION The invention relates to an engine-building for use in testing diesel fuel injection equipment.

The purpose of the invention is to increase the productivity of the device for measuring the cycle feed.

Fig. 1 is a schematic diagram of the device; Fig. 2 shows graphs of the change in time Ј of the pressure of Russia before the nozzle; Fig. 3 is a graph of pressure change in measuring cylinder 0 q and piston S displacement at angular frequency of motor shaft rotation n (and p2 (where Ј3 is the starting delay time of piston movements {S, first incomplete piston displacements; S - current full displacements piston)

A device for measuring the cyclic fuel supply contains a fuel tank 1, a high-pressure fuel pump 2 (high-pressure pump), connected with pipelines 3, a nozzle k with an antifoam 5 connected to a measuring cylinder 6, B in the cylinder 6 and accommodating axial displacement from the initial position, the piston 7 with the rod 8, loaded by the force of the springs 9. The magnitude of the displacement of the piston 7 is determined by the displacement gauge 10, the internal cavity of the measuring cylinder 6 through the solenoid valve 11 communicates with A drain line 12. A solenoid valve 11 is connected to a counter 13 of the number of injections, which in turn is connected to an AND sensor of injections connected to pump 2, a counter 13 of the number of injections is connected to an additional sensor 15 of a piston 15 displaced from the initial position of the piston in the direction of its

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displacement, and a piston displacement meter 10.

The cyclic feed measurement device operates as follows.

The fuel from tank 1 is pumped through injection pump 2 to injector k and through foam blower 5, measuring cylinder 6 and de-energized solenoid valve 11 to drain line 12. Spring 9 holds piston 7 in initial position. To measure the cycle supply, a voltage is applied to the coil of the solenoid valve 11, the valve blocks the drain of fuel from the cavity of the measuring cylinder to the transfer line 12. The fuel enters the measuring cylinder, causing the piston 7 to move, overcoming the force of the spring 9 "After moving the piston 7 to the value S, the displacement sensor 15 outputs a enable signal to the counter 13 of the number of injections at the beginning of the count of injections. The arrival of the first signal received from the sensor of injections provides the beginning of the count of the number of injections by the counter 13 and the measurement of the movement of the piston by the meter 10 movements. The counter 13 of the number of injections from the sensor Ik of the injections is supplied to a signal; pile on every injection. After the arrival of the number of signals from the start of counting equal to a predetermined, the counter 13 of the number of injections gives a signal to stop measuring the displacement of the piston by the displacement meter 10 and to open the valve 11. The result of the measurement is recorded on an information board (not shown). The time of movement of the piston 7 by the value of Sn at a constant cyclic feed depends on the frequency of injections and shortens as it increases.

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Thus, installing an additional displacement sensor with an offset from the initial position of the piston in the direction of its movement associated with the injection number counter allows for an optimal delay in the counting of the injection number with respect to the beginning of the piston movement at any injection rates. Injection frequency, delay time is reduced. Therefore, such installation of a piston displacement sensor allows for higher device performance while improving the accuracy of measuring the cycle feeds.

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Claims (1)

Claim 20 A cyclic fuel delivery measurement device comprising a graduated cylinder with a piston mounted with 0 five 0 one possibility of axial movement from the initial position and connected to the rod and piston displacement meter, test pump connected to the measuring cylinder, solenoid valve for communicating the measuring cylinder to the drain line, injection number counter connected to the piston displacement meter and connected to the electromagnetic valve , an injection sensor connected to the pump, and means for detecting the origin of fuel injections, characterized in that, in order to increase productivity, the means for The starting point of fuel injection is made in the form of an additional piston displacement sensor, installed offset from the initial position of the piston in the direction of its displacement and connected to the counter of the number of injections. Ri The frequency of the impulse-l R start again. piston TJ At / 7f S FIG. 2 Editor N. Yatsola Compiled by V.Pavlyukov Tehred L.Oliynyk Order Circulation kЦ О VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab., T./5 Proofreader S.Shvvkun Subscription