RU2784765C1 - Two-stroke internal combustion engine with additional steam power stroke - Google Patents

Abstract

FIELD: internal combustion engines.

SUBSTANCE: invention can be used in internal combustion engines. A two-stroke diesel internal combustion engine with an additional steam stroke consists of a piston group, a crank mechanism, a fuel system, a gas distribution system with purge windows (12) and an exhaust valve (9). The engine has a water nozzle (7) located at the top of the cylinder (11) and an exhaust valve (9) in the cylinder head (1). An additional steam power stroke is carried out due to the injection of water converted into steam, and the performance of useful work in the form of pressure on the piston, and the return of the piston to its starting point due to the kinetic energy of the flywheel. The start of water injection into the cylinder through the water nozzle (7) and the end of water injection is carried out when the piston has not reached top dead center before the opening of the exhaust valve (9).

EFFECT: diesel fuel savings.

1 cl, 2 dwg

Description

The invention relates to engine building, in particular to methods of operation of two-stroke internal combustion engines.

Known internal combustion engine with a device for metered supply of water vapor [Patent 2189469. An internal combustion engine with a device for metered supply of water vapor. Medvedev Yu.S., Kokorev G.D., Odinets S.B. Application 2000121940/06 dated 08/17/2000. Published on 20.09.2021. Bull. No. 26]. The internal combustion engine contains two cylinders with inlet and outlet valves and windows in which non-return valves are located, an exhaust gas recirculation line connected to the latter, and an exhaust gas receiving chamber. Additionally, a device for metered supply of water vapor was introduced, consisting of a housing in which an inlet valve with a spring is placed on the exhaust gas supply side. The dosing device is made in the form of a cylinder with a piston, holes are made in the cylinder, in which shut-off valves are installed. The inlet valve is movable with the piston.

The disadvantage is the complexity of the design, which consists in the introduction of a steam generator, the presence of two valves per cylinder, which takes away the useful power of the engine.

The technical result is that the proposed engine will save diesel fuel and increase the power density of the engine.

The technical result is achieved by the fact that a two-stroke diesel internal combustion engine with an additional steam power stroke consisting of a piston group, a crank mechanism, a fuel system, a gas distribution system with purge windows and an exhaust valve, the engine having a water nozzle located in the upper part of the cylinder and exhaust valve in the cylinder head, according to the invention, an additional steam stroke is carried out due to the injection of water converted into steam, and performing useful work in the form of pressure on the piston and returning the piston to its original point due to the kinetic energy of the flywheel, and the start of injection of water into the cylinder through the water nozzle and the end of water injection, is carried out when the piston has not reached top dead center before the opening of the exhaust valve.

The invention is illustrated by drawings.

In FIG. 1 shows a diagram of the cooling system and the purge system, in Fig. 2 stages of steam operation.

The engine consists of the following parts (Fig. 2): 1 - cylinder head, 2 - air cooling jacket, 3 - piston, 4 - intake port, 5 - connecting rod, 6 - crankcase, 7 - water nozzle, 8 - fuel nozzle, 9 - exhaust valve, 10 - exhaust port, 11 - cylinder, 12 - purge windows, 13 - crankshaft.

The principle of operation of the designed engine (Fig. 2): stage 1 - the beginning of water injection into the cylinder (11) through the water nozzle (7), when the piston (3) has not reached the top dead center; stage 2 - the end of the water injection, when the piston has not reached the top dead center; stage 3 - valve opening (9); stage 4 - the beginning of the opening of the purge windows (12); stage 5 - closing the purge windows (12); stage 6 - closing the valve (9) (Fig. 2); stage 7 - start of injection of diesel fuel through the nozzle (8); stage 8 - end of diesel fuel injection; stage 9 - valve opening (9); stage 10 - the beginning of the opening of the purge windows (12); stage 11 - closing the purge windows (12); Stage 12 - closing the valve (9).

After the end of the internal combustion engine, water is injected, which turns into steam and performs useful work in the form of pressure on the piston and returns to the starting point due to the kinetic energy of the flywheel, which will increase the specific power of the engine while saving diesel fuel.

In the designed diesel engine, it is planned to use heavy fuel for two cycles, which will increase the specific power. The presence in the designed engine of one valve per cylinder reduces the power loss to drive the gas distribution mechanism.

Claims (1)

Two-stroke diesel internal combustion engine with an additional steam power stroke, consisting of a piston group, a crank mechanism, a fuel system, a gas distribution system with purge ports and an exhaust valve, the engine having a water nozzle located in the upper part of the cylinder and an exhaust valve in the head cylinder, characterized in that an additional steam stroke is carried out due to the injection of water converted into steam, and performing useful work in the form of pressure on the piston, and returning the piston to its original point due to the kinetic energy of the flywheel, and the start of water injection into the cylinder through a water nozzle and the end of water injection is carried out when the piston has not reached top dead center before the opening of the exhaust valve.

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