RU1776867C - Stand for diagnostic checks and adjustment of ignition distributor - Google Patents

Abstract

Usage: diagnosis of internal combustion engine. SUMMARY OF THE INVENTION: The proposed stand, unlike the known one, allows diagnosing a centrifugal regulator and a vacuum corrector of an ignition distributor. This is achieved by the fact that in the proposed stand on the upper plate there is a two-arm lever that can swing in a plane parallel to the axis of the ignition distributor shaft. One arm of the lever is associated with additional load and measuring devices, and the other with a tight vacuum corrector. There is a distributor housing lock connected to the upper plate of the stand. 2 s, p. f-ly, 3 ill.

Description

The invention relates to the operation of carburetor internal combustion engines, in particular to devices for diagnosing and adjusting an ignition distributor.

A known stand for diagnosing and adjusting the ignition distributor (1 with a centrifugal ignition timing controller, comprising a base for installing the distributor, a camshaft drive cam retainer associated with the base, a load device, a measuring scale, an arrow mounted on the camshaft output shaft and kinematically connected with a loading device, an upper plate placed on racks fixed to the base, a rotary dial with a scale applied on it and a limb position lock, times eschenny on the upper plate, vertical block mounted on the limb rotatably relative to the axis of vertical and horizontal block rigidly coupled

with an arrow, the latter being connected to the load device by means of a flexible link passing through both units.

The disadvantage of this stand is a non-integrated diagnosis, because The stand is designed to diagnose only the centrifugal controller, and the vacuum corrector remains unchecked. In practice, most ignition distributors are equipped with vacuum correctors, which, like centrifugal regulators, change the ignition timing when the engine is running. The law of change of lead was ignited depending on the engine speed and on the load on the engine, which affects the engine power and, therefore, the economic efficiency of the engine.

In the known stand, the arrow mounted on the output shaft of the distributor and the horizontal unit rigidly connected to the arrow do not allow checking the vacuum corrector.

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The aim of the invention is to expand the functionality by checking the vacuum corrector,

This goal is achieved by the fact that in a known stand containing a base for installing distributors, a fixer for the distributor drive shaft connected to the base, a loading device, a measuring rod / h) for that distributor mounted on the HP follower and a kinematch with load arrangement, a joint venture plate placed on racks fixed to the base, a rotary dial with a scale applied on it and a fixed position of the limb positioned on the upper plate, a vertical block, mounted on the limb with the possibility of the front panel relative to the vertical axis, and the legal block rigidly connected to the arrow, the latter being connected to the load device by means of a flexible link passing through both blocks, is additionally equipped with a fixed distributor element of the distributor relative to the top plate, additional load and measuring devices, and on the top plate a two-arm lever is installed with the possibility of swinging in a plane parallel to the axis of the shaft, moreover, one arm of the lever is associated with additional loading / measuring and measuring devices s, and another with r-yu stkuumnogo corrector.

Thanks to the two-arm lever, it is possible to compress the spring of the vacuum corrector and simultaneously deform its diaphragm, thereby simulating the effect of the rarefaction that occurs in the vacuum cavity of the vacuum corrector during the operation of the engine.

Using a well-known stand as a lever of a horizontal pull unit is impractical, as in the case of a zoom case, the lever arm is determined by the design of the distributor and does not position it to reduce the error in the transmission of force to the vacuum corrector due to a significant (10-12 °) angular moving the chopper plate. The proposed lever can be increased to obtain the required accuracy.

With an increase in the load on the lever and, consequently, on the spring, the deformation of the spring, which is measured by a measuring device, increases. Since the force characteristic of the spring is straightforward, it is sufficient to determine the deformation at two load values. Having received the data and comparing it with the reference data, the state of the vacuum corrector is judged.

A comparative analysis with the prototype shows why the stand being set up differs in terms of additional features. When studying this and related technical areas, the features that distinguish the claimed technical solution and other technical solutions were not identified and, therefore, ensure that the criteria are novelty and a significant difference.

0 The loading device can be made in the form of exemplary loads or a dynamometer, the measuring device can be in the form of a dial indicator (for example, I4-Ш GOST 577-68) or in the form of an arrow and

5 scales.

In FIG. 1 shows a stand, a general view; in FIG. 9. The same, top view (bracket, load devices and measuring device not shown); in FIG. 3 - stand with

0 exemplary loads as load devices and an arrow with a scale as a measuring device.

The switchboard stand is a verifiable distributor 1 {Fig. 1) with a vacuum core 5 mounted on the distributor housing, the upper plate 2, the lower base 3, connected by struts 4, limb 5, gigrizoigapy traction unit 6, mounted on the driven shaft of the distributor and

0 fixed by winding 7, dynamometer 8 with ring 20 or model i ruts 9 (Fig. 3), tbkrp irfioei sh zleyeng 10 (Fig. 1), connecting the dipamomeph to the horizontal traction block 6 through the vertical block 11,

5 a distributor housing retainer 12, a distributor drive shaft retainer 13, an arrow 14 (Fig. 2), rigidly connected to a horizontal traction unit 6, an arm 15 mounted on the top plate 2,

0 lever 16 mounted on the axis of the bracket 15 with the possibility of rotation around an axis, one end of which abuts against the rod of the vacuum corrector 21, and a load device b (or 9) and a measuring device 19 (or 18 and 19) are connected to the other end of the lever , limb lock 22. The measuring device (indicator) is screwed to the stand, which is installed on the top plate 2. Load device

0 is attached to the lever 16 by means of a flexible pull member 23.

The stand works as the following sample. Check valve 1 (Fig. 1) is installed in the base 3 of the stand and

5 screw lock 13 stops its input shaft. The horizontal traction unit 6 with arrow 14 is mounted on the output shaft of the distributor and clamped by the latch 7. The dynamometer 8 with the ring 20 is connected, is a flexible traction element 10 through

a vertical supporting block 11 with a horizontal sloping block 6. By turning the dial 5 relative to the arrows km 14, the reference point is set to zero and the latch 22 is clamped (Fig. 2). Applying force to the ring 20 (Fig. 1) of the dynamometer 8, register it on the dynamometer scale (or suspending the model weights 9 (Fig. 3), determine the deflection angles of arrow 14. The obtained angle values are compared with the deflection angles of the reference distributor, measured with the same Thus, the distributor’s technical condition is judged. Then, the distributor housing is fixed with the screw 12 (Fig. 1). The indicator 17 is set to zero. The first (small) is applied to the lever 16 through the dynamometer 8 (or by suspending the first model load 9) ) effort and register readings on indicator 17 (or on a scale of 19) (Fig. 2). After that, apply a second (large) force (or suspend the second model load 9) and record the indicator (or on a scale of 19), comparing the traction of the vacuum corrector 21 with the movements of the reference distributor, measured in the same way, judges the technical condition of the vacuum corrector.

Based on the diagnostic results, the distributor decides to repair the worn parts, eliminate the increased clearances in the joints, change the tension of the springs or replace them. The use of the proposed stand improves the accuracy of diagnosis due to the comprehensive verification of the centrifugal regulator and the vacuum corrector (in the prototype, only the centrifugal regulator). As a result, a predetermined ignition advance angle is achieved and significant fuel economy is achieved.

Claims (3)

SUMMARY OF THE INVENTION 1. A test stand for diagnosing and adjusting an ignition distributor with a centrifugal ignition timing controller, comprising a base for mounting the distributor, a camshaft drive cam retainer coupled to the base, a load device, a measuring scale, an arrow mounted on the camshaft output shaft, and kinematically connected with the loading device, the upper plate, placed on racks, fixed on the base, a rotary dial with a scale applied on it and a limb position lock, located on the top plate, a vertical block mounted on the limb with the possibility of rotation with respect to the vertical axis, and a horizontal block rigidly connected to the arrow, the latter being connected to the load device by means of a flexible cable passing through both blocks, excluding and so that, in order to expand the functional opportunities due to the diagnosis of a vacuum corrector with a thrust, it is equipped with a fixing element of the distributor relative to the upper plate, additional load and measuring devices, and on the upper plate there is a two-arm lever with the ability to swing in a flat position, parallel to the axis of the shaft, and one arm of the lever is associated with additional load and measuring devices, and the other with a vacuum corrector. 2, The stand according to claim 1, with the fact that the additional measuring device is made in the form of an arrow connected to the lever arm and mounted on the upper plate of an additional scale, 3. The stand according to claim 1, about t and h and ya and with in that the additional measuring device pypOlneio in the form of a dial indicator mounted on the top plate with a foot in contact with lever arm. 6 srig-2 M / .G fi2.3.