SU985393A1 - Method of facilitating repeated after halt i.c.engine starting - Google Patents

Description

The invention relates to a motor construction, namely to methods of facilitating the start of internal combustion engines at low ambient temperatures.

There is a known method of facilitating the repeated, after (stopping, starting the internal combustion engine at low temperatures by heating the oil in the crankcase and then feeding the oil into the channels of the lubrication system 1.

However, the method provides a quick warm-up of the remaining oil in the lubrication system channels after the engine stops due to the significant removal of the main main channels of the new line and bearings from the heating surface, and the frozen oil plugs formed in the channels result in a sharp increase in the resistance of the channels.

The purpose of the invention is to accelerate the start-up by reducing the hydraulic resistance of the lubrication system by preventing congealed oil from forming in the channels.

 Achieving the goal in the method of facilitating the re-start, after stopping, of the engine starting inside the engine at low temperatures by heating the oil in the crankcase and then feeding the oil into the lubrication system channels, directly

e after stopping the engine, compressed air is fed into the lubrication system channels to displace warm oil into the crankcase.

The drawing shows a diagram of the device with which the method is carried out.

The device contains the main oil pump 1 of the lubrication system, located in the crankcase 2 of the internal combustion engine, and an additional oil-charging pump 3 with an independent drive, connected parallel to the main pump 1. The discharge chamber of the pump 3 is connected through the check valves 4 and 5 to the main channels 6 the oil line of the lubrication system; and to the submount 7m and 8, respectively, of the engine crankshaft and turbocharger. Receiver 9 available

Claims (1)

25 with compressed air, communicated on one side by the pipeline with the channels 6 of the main oil line through the spring-loaded check valve 11 and through the check valve 12, and on the other pipe 13 with the cylinder 14, the engine through the check valve 15 and the spring-loaded check valve 16. The method is carried out in the following way. Immediately after stopping the engine at low ambient temperatures, the lubrication system channels 6 are supplied with compressed air from the 9 / dl reservoir and the shut-off valve 11 is opened. The compressed air opens the i2 check valve and enters the pipe 10 to the kaial 6, expels warm oil from channels b and gaps bearings 7 and 8 into crankcase 2 of the engine. Check valves 4 and 5 are closed. Before restarting the engine after a long period of time at low ambient temperatures, the oil is heated in the crankcase 2 using an autonomous heater installed in it, then the oil pumping pump 3 is turned on and the heated oil from the crankcase 2 is fed through the check valve 4 to the channels 6 and bearing clearances 7 and 8. Valves 5, 11, 12, 15 and 16 are closed. Since the warm oil from the channels b of the main oil line of the lubrication system is displaced into the crankcase by air immediately after stopping the engine, no frozen oil plugs are formed in the channels b, and the heated oil, due to the small hydraulic resistance of the channels of the lubrication system b, does not have time to cool, It quickly goes to bearings 7 and 8 to warm up the engine part to operating temperatures and shorten the time it takes for the engine to prepare for load. To create an overpressure of air in the receiver 9, the shut-off valve 16 is opened and the engine is cranked with a starting device without fuel supply, while the air from the cylinder 14 through the check valve 15 enters through the pipeline 13 into the receiver 9. Valves 11 and 12 are closed. After reaching a certain pressure in the receiver 9, the valve 6 is closed and the engine stops rolling. The tests carried out showed that the application of the proposed method at a pressure of compressed air of 15 kg / cm ensures fast and reliable restart of the engine at an ambient air temperature. The invention method of facilitating the re-start, after stopping, starting the internal combustion engine at low temperatures by heating the oil in the crankcase and the subsequent supply of oil to the channels of the lubrication system, divert-. In order to accelerate the start-up by reducing the hydraulic resistance of the lubrication system, directly after stopping the engine, compressed air is fed into the lubrication system channels to displace the warm oil into the crankcase. . Sources of information taken into account during the examination 1. Orlin A.S. and Kruglov MG. Engines of internal combustion. Design and operation of piston and combined engines M., Mashinostroenie, 1980, p. 173.