SU691587A1 - Method of operation of an internal combustion engine - Google Patents

Description

one

The invention relates to the field of manganostrek and can be used in internal combustion piston engines, mainly with compression ignition.

Methods are known for operating an internal combustion engine with compression ignition by intake air into the cylinder, fuel injection and Exhaust Gas Additive L.

V The formation of nitrogen oxides in the combustion chamber is limited to local areas with high temperatures and high concentrations of air. When fuel is injected, such zones are usually limited to a piston position of 15–20 ° from the center of the crankshaft after top dead center. The formation of other toxic substances (carbon monoxide and hydrocarbons) decreases significantly with excess air and high combustion temperatures, which contribute to improved efficiency and engine performance.

With known methods of operation, the exhaust gases together with air fill the entire volume of the combustion chamber, which reduces

air concentration in the fuel injection zone; as a result, the formation of nitrogen oxides in engine exhaust gases is reduced. However, further combustion also occurs with a lower air concentration, which increases the content of carbon monoxide and hydrocarbons in the exhaust gases and reduces the efficiency and engine power due to incomplete combustion.

The object of the invention is to create a method by which fuel would be injected and ignited in an environment with a low concentration of air and a higher concentration of exhaust gases, and with a decrease in temperature in the combustion chamber by increasing the volume of the cylinder in the process. Increased combustion would occur in the zone of high air concentrations and low exhaust gas concentrations, which will reduce the content of toxic substances in the exhaust gases.

Claims (2)

The aim of the invention is to reduce toxicity without degrading engine performance and engine economics. To do this, according to the proposed method, an exhaust gas additive is produced in the fuel injection zone, and the air supply is in the diametrically opposite zone. The exhaust gas additive can be started at the end of the intake stroke and completed before the fuel BripFJCKOM. FIG. 1 shows the engine at the piston position at the end of the compression stroke; in fig. 2-- section A-A in FIG. 1. An internal combustion engine with ignition from contains cylinder 1, the piston 2 is located there. Cylinder I is connected to inlet 3 and outlet 4 pipelines and recirculation pipe 5, respectively, through valves 6.7 I 8. In recirculation pipe 5, there is a pump 9 Cylinder 1 is equipped with a nozzle 10 connected via a fuel line 1.1 to a fuel pump 12. Valve 8 of the recirculation pipe 5 is located in zone B of cylinder I, in which nozzle 10 is located. When working in cylinder 1 of the engine through an intake pipe Du 3 supply air during the intake stroke. At the end of the compression stroke, valve 8 is opened and exhaust gas is injected into zone B from the recirculation pipeline under pressure created by pump 9, which displaces air from zone B to the diametrically opposite zone B of cylinder 1. The amount of exhaust gases is controlled by pump 9 . Exhaust gases may enter cylinder I and during the intake stroke. In this case, their additive is produced in zone B, and air is supplied in diametrically opposite zone B of cylinder 1.- The amount of exhaust gases can be controlled by the shut-off valve of pump 9. It is important that before injection of fuel in zone B there is a mixture with a high concentration of exhaust gases and a low concentration of air, and in zone B a mixture of large k6sh {air concentration. After injection of fuel from a 10 V nozzle, zone B ignites the mixture in this zone. Since in zone B combustion takes place with a shortage of air, OFIO is characterized by a low level of formation of nitrogen oxides. Subsequently, during the expansion, combustion is transferred to zone B with elevated air content, the temperature of which is insufficient for nitrogen and oxygen in the air, but sufficient for carbon monoxide and hydrogen carbon to burn. Exhaust gases are emitted through valve 7 to the exhaust conduit 4, a portion of the gases from which enters the recirculation conduit 5, and the other portion enters the atmosphere. The proposed method makes it possible to reduce the amount of exhaust gases entering the cylinder, to improve the engine filling ratio and to reduce the content of toxic substances in the exhaust gases without deteriorating engine power and economic performance. Claim 1. The method of operation of an internal combustion engine with a compression-ignition inlet air cylinder, fuel injection and exhaust gas additive, characterized in that, in order to reduce toxicity without deteriorating engine power and economic performance, the exhaust gas additive is produced fuel injection zone, and air intake - in the diametrically opposite zone. 2. A method according to claim 1, wherein that the exhaust gas is started at the end of the intake stroke and ends up with fuel injection. Sources of information accepted by you during the examination 1. US patent No. 3802402, -kl. 123-119, 1974 ..