SU981650A1 - Apparatus for producing reference signals at diesel engine diagnostics - Google Patents

Description

The invention relates to the technical diagnosis of diesel engines, namely, devices for assessing the technical condition of diesel engines without disassembly methods.

A device for obtaining reference signals in diagnosing diesel engines, comprising a ring rotating on the washer of a fuel pump drive with contacts and a ring gear in it, and a fixed bracket with grooves, one of which has a sensor of the reference signal 1,

The disadvantage of the device is the impossibility of its use without disassembling the pump drive when installing the device on a diesel engine, which is very laborious.

The purpose of the invention is to reduce the complexity of the process of diagnosing a diesel engine.

 The purpose of the device for obtaining reference signals in diagnosing diesel engines is achieved by the fact that the ring is made detachable in the form of two half-rings connected, on the one hand, with the aid of a hinge, and with the other, with a screw, and the latter connects the ring with washer pump drive, moreover, the hinge is placed near

the outer surface of the ring, and the half-ring connector is made at the depression between the teeth of the crown.

FIG. 1 schematically shows a device on a diesel engine; in fig. 2 - locking part of the split ring; in fig. 3 shows the hinge portion of the ring in FIG. 4 is a side view with a noKctaoM half-ring connector.

The device for receiving reference signals consists (FIG. 1) of a sensor 1 installed in the groove 2 of the bracket 3, which is fixed to the engine with a bolt 4 inserted into the groove B of the bracket 3. With respect to the bracket 3, the sensor 1 is fixed by a collet nut 6 and clamping lock 7..

A ring 10 with apertures 11, which act as contacts for receiving reference signals, and a gear ring 12 for measuring diesel power indicators are mounted on the washer B of the fuel pump drive 9.

The ring 10 consists (2) of two half-rings 13 and 14, fastened with a screw 15 with a tapered end for fixing the half-rings on the washer B.

Half ring 13 has (Fig. 3) two protrusions 16, forming a shaped groove.

which includes the protrusion 17 of half-ring 14, Half-rings 13 and 14 are interconnected by means of a hinge 18 (Fig; 2) located near the outer surface of the ring 10 to provide the necessary opening of half-rings 13 and 14 5 | when they are opened.

The device is configured and operates as follows.

Removing the screw 15 and opening the half rings 13 and 14, wind up the ring 10 on 10 washer 8 on the fuel pump 9 and fix the half rings 13 and 14 on the washer 8 by screw 15 so that the ring 10 can be turned by hand. Then the bolt 4 is turned off approximately by two 15 turns, inas 5 of the bracket 3 are inserted under its head, and the bolt 4 is tightened

Next, in the groove 2 of the bracket 3, the sensor 1 is installed and its position is fixed by a nut 6 and a lock nut 7 on the de-120 circulating distance of the sensor 1 face from the outer surface of the ring 10.

Then, turning the ring 10, align the center of the end face of the sensor 1 with the center of the hole 11 and fix the position of the 25 ring 10 on the washer 8, turn it until the screw 15 stops.

When performing the above adjustment operations, the piston of the first cylinder of the diesel engine should be fe, Q, the position of the TDC at the compression stroke. This provides the reference signal corresponding to the beginning of the diesel cycle, the second signal to the end of this cycle and the beginning of a new cycle, etc.

The pCL of determining the diesel engine performance indicators sensor 1 is unlocked {FIG. 1) by loosening the lock nut 7 and is displaced through the groove 2 of the bracket 3 so that the axis of the sensor 1 0 passes under the middle of the gear screw 12 and the end of the sensor 1 is at the required distance from the outer surface of the ring 12. Then the position of the sensor 1 is fixed lock nuts 7.

When the device is operated, for example with an induction type sensor, the formation of the reference signal occurs due to a change in the electromagnetic flux in the sensor 1 when the hole 11 in the ring 10 originates under its end (Fig. 1). In principle, any known type of sensor can be used.

In the case of determining the power indices of the diesel, the reference signal is formed; when passing under the end of the sensor 1 of the cavities of the ring gear 12, which is fixed by the diagnostic device.

The use of the device allows to reduce the laboriousness of the preparation and testing of diesel engines, and thereby increase the productivity of diagnostics of diesel engines in operation.

Claims (1)

Invention Formula A device for obtaining reference signals when diagnosing diesel engines, contains a ring rotating on the washer of the fuel pump drive with contacts and a ring gear and a fixed bracket with grooves, one of which has a sensor of the reference signal, characterized in that, in order to reduce labor intensity by eliminating disassembly of the pump drive when the device is installed on a diesel engine; the ring is made detachable in the form of two half rings connected to each other on one side with a hinge / and on the other using a coagulant, and for the last ring is connected with the pump drive washer, and a hinge disposed near the outer surface of the ring and the half-rings formed of hollow connector between the teeth of the crown. Sources of information taken into account in the examination 1, N. Zhdanovsky and others. Diagnostics of autotractor engines using electronic devices. L. Kolos, 1973, p. 69 1 I 4 J