8.5.1. Installation of the moment of ignition


Fig. 8 — 21. Tags for installation of the moment of ignition: 1 — VMT tag on a pulley of a bent shaft; 2 — an ignition advancing tag on 10 °; 3 — an ignition advancing tag on 5 °; 4 — an ignition advancing tag on 0 °

For check of the moment of ignition there are three tags 2, 3 and 4 (fig. 8 — 21) on a cover of the mechanism of gas distribution and a tag 1 on a pulley of a bent shaft, the corresponding piston VMT in the first and fourth cylinder at coincidence to a tag 4 on a cover.
Initial corners of an advancing of ignition for various engines and the applied gasolines are specified in the appendix 4.
It is possible to check and determine the ignition moment by means of a stroboscope, working in the following order:
— connect a clip "plus" a stroboscope to the plus plug of the rechargeable battery, a weight clip — to the minus plug of the rechargeable battery, and attach a clip of the sensor of a stroboscope to a wire of high voltage of the 1st cylinder;
— designate chalk for the best visibility a tag 1 on a pulley of a bent shaft. Start the engine and warm up it that it worked at the minimum turns of idling;
— direct the blinking stroboscope light stream to a pulley and check whether there corresponds the provision of a tag of a pulley to the values of a corner of an advancing of ignition specified in the appendix 4.
For adjustment of the moment of ignition stop the engine, weaken a nut of fastening of the distributor of ignition and turn it on a necessary corner. For increase in a corner of an advancing of ignition the case of the distributor should be turned counterclockwise, and for reduction — clockwise. Then again check installation of the moment of ignition.
If there is a diagnostic stand with an oscilloscope, then with its help it is possible to check easily installation of the moment of ignition too, being guided by the instruction on the stand.
Install the distributor of ignition removed from the engine into place in the following order:
— uncover the ignition distributor, check and if necessary adjust a gap between contacts of the breaker;
— turn a bent shaft prior to the beginning of a compression step in the first cylinder, and then continuing to turn a bent shaft, combine a tag 1 with a tag 3;
— turn a rotor in such situation at which its external contact will be directed towards contact of the first cylinder on a distributor cover;
— holding a distributor shaft from a provorachivaniye, insert it into a nest on the block of cylinders so that the axial line passing through spring latches was approximately parallel to the axial line of the engine;
— fix the distributor on the block of cylinders, establish a cover, attach wires, check and adjust installation of the moment of ignition.