SU63651A1 - The method of operation of the diesel engine on the Sabate cycle on gas fuel - Google Patents

Description

Question On the operation of Diesel engines on gas, especially in gas-generating, without the addition of liquid fuel is very important. Allowing it to free up significant amounts of liquid fuel currently consumed by existing installations of this type of engines.

The successful resolution of the issue of diesel engine operation on gas-generating gas (in a mixed cycle) without the addition of liquid fuel creates a desire to replace not only stationary engines operating in the Otto cycle, but also diesel engines of the same type that operate in a mixed gas-generating gas cycle if the economic efficiency of the latter at the same time turns out to be as high as when working on liquid fuel.

The method of operation of diesel engines in a mixed cycle on a gas with its calorific value of at least 4000-5000 cal / m is not new.

According to this method, a scanty mixture of gas and air is introduced into the engine cylinder during the suction process, after which at the end

compression is introduced through the nozzle an additional amount of gas.

However, this method has not been fully developed and is unsuitable for use with fuels with a calorific value of less than 4000-5000 cal / m3, as reflected in the technical literature. Moreover, this one famous method cannot be used to convert existing Diesel engines from liquid fuel to producer gas without the addition of liquid fuel. The work already done on converting Diesel engines to producer gas showed the need for gas additives of liquid fuel in an amount of from 20 to 30% for compressor machines and a few smaller quantities for non-compressor one.

The present invention has been directed to eliminating this disadvantage of the known method of operating a diesel-on-gas engine and differs from it in the following:

1. An additional gas supply is produced under a pressure of not more than 55 atm. without preheating the gas before being injected into the cylinders through the nozzle.

2. The air-to-gas ratio in the lousy laughter introduced into the cylinders during the suction process is in the range of 3-1.5 depending on Art. J: gas altitude.

Due to these features, the method according to the invention allows the use of generator gas with a calorific value of 900-1100 cal / m. This opens up the possibility of expanding the Diesel engine fleet to operate on low-calorie gas, as well as to transfer engines that are in operation (transport and stationary) from liquid fuel to generator gas without losing power and without decreasing the efficiency factor. engine

The drawing shows a diagram of a diesel installation for implementing the method constituting the subject matter of the invention.

The engine under the proposed method is as follows.

Gas from gas generator 1 enters through pipeline 2 to coarse purifier 3. Then through pipeline 4, gas passes through fine purifier 5 and is directed through pipelines 6 and 7 respectively to gas mixer 8 with air and to e; compressor 3 of compressor 10. From mixer 8 the mixture with the determined ratio of air to gas, set according to the caloric content of the gas, flows through the suction valve 11 into the working cylinder 12 of the diesel engine. In the working cylinder, the mixture of generator gas and air is given to a pressure of 36-37 atm., Which corresponds to a compression ratio of E 15-16.

The gas entering into the com- pressor 10 (with a completely open opening 10), is compressed in the latter to a pressure of 50-55 atm. and through pipelines 13 and 14, the passage, respectively, of refrigerators 15 and 16 of the first and second stages of the compressor, is directed to the working cylinder 17. From the working cylinder, the compressed gas passes through pipe 18 to the engine nozzle, and passes through a non-return valve 19 installed on the pipe 18. When the nozzle needle is opened, the compressed gas is blown into the cylinder of a diesel engine, enriches the gas-air mixture prepared for ignition, and thus contributes to its lameiae (the angle of advance of the needle opening remains the same as in Diesel oil works).

The engine start is produced 5 with compressed air (running through pipe 20 of the starting cylinders). Air consumption is replenished by the same compressor when Diesel operates on oil after its start with a three-way valve 21 of the gas supply line 7 which is previously closed and the pipeline 22 is open, through which atmospheric air can flow into the compressor. When operating a diesel on gas, pipe 22 must be closed.

The subject of the invention and

The method of operation of the diesel engine of the Sabate cycle on gas fuel without a liquid fuel toffee with the introduction of the lean mixture into the cylinder during the suction process and with the subsequent introduction of additional gas at the end of compression through the nozzle, so that in order to use the generator gas as a fuel (calorific capacity of 900-1000 cal / m), the additional gas supply through the nozzle is produced under a pressure of no more than 55 atm., without heating the supplied gas, at an air-to-gas ratio in the poor parameter, injected into the cylinder during the suction process 5, which is in the range of about 1 h

J - 1, Oh.