SU1254185A1 - Method of operation of i.c.engine - Google Patents

Description

FIELD OF THE INVENTION The invention relates to mechanical engineering, in particular engine building, in particular to methods for Teabota of gas-turbine supercharged internal combustion engines.

The purpose of the invention is to increase the energy efficiency of the fuel.

FIG. 1 shows a diagram of the engine, working, it is on the proposed method with a six-stroke cycle; in fig. 2 - the same, with a four-stroke cycle.

The engine contains a crankshaft 1, piston 2, connecting rod 3, cylinder 4, additional chamber 5, additional chamber heat exchanger 6, inlet valve 7, exhaust valve 8, additional chamber valve 9, nozzle 10 for supplying fuel to cylinder 4, nozzle 11 for fuel supply to the afterburner 12, the turbine 13, the compressor 14, the actuator 15 valves, the actuator 16 of the compressor 14 and the turbine 13.

The method is carried out as follows.

When the piston 2 moves to the bottom dead center, the inner space of the cylinder 4 is filled with charge air blown through the open inlet valve 7. The valve 9 of the additional chamber 5 is also open at this time, and the exhaust valve 8 is closed. Subsequently, when the piston moves from the bottom dead center to the top dead center, the intake valve 7 is closed and air is compressed in the cylinder 4 and additional chamber 5. When the piston 2 approaches the top dead center, the valve 9 is closed and in cylinder 4 by means of the nozzle 10 is fed fuel. Then, when the piston moves to the bottom dead center, the fuel burns, the combustion products expand, completing the work. With the subsequent movement of the piston to the upper dead center, the exhaust valve 8 is opened and the exhaust gases are released into the heat exchanger 6 of the additional chamber 5 and further into the afterburner 12, and then into the turbine 13 connected through the drive 16 to the engine shaft 1. At the end of the first exhaust stroke, the exhaust valve 8 is closed, and the valve 9 is opened. The heated air is supplied from the additional chamber 5 to the cylinder 4, where it expands and makes a second working stroke. Then, when the piston moves to the top of the dead

the valve 9 is opened at the point and exhaust air is expelled into the heat exchanger 6 and further into the afterburner 12. When the exhaust gases and the air pass through the afterburner 12, the fuel through which the exhaust in the cylinder 4 gases are sent to the turbine 13. The opening and closing of the valves 7-9 are coordinated with the movement of the piston 2 and the shaft 1 by means of, and the actuator 15, so that the six cycle cycles performed sequentially.

FIG. 2 shows the engine layout,

carrying out the proposed method of operation with a four-stroke cycle. Positions 8 in FIG. 2 corresponds to an outlet window instead of an exhaust valve in FIG. 1, 17 denotes a nozzle for injecting water into an additional chamber 5.

The engine (Fig. 2) works as follows.

With the open exhaust ports 8, the inlet to the papan 7 and the valve 9, the cylinder 4 is purged. When the piston 2 moves

from the lower dead point to the upper dead point, it closes the exhaust ports 8, then the inlet valve 7 is closed and the fresh charge is compressed in the cylinder 4 and the additional chamber 5. When the piston approaches the dead center, close the valve 9 and supply fuel to cylinder 4 by means of nozzle 10 and water injection into additional chamber 5 by means of nozzle 17. The products of combustion of fuel, which are expanded in cylinder 4, make the first working stroke of the cycle. When opening the exhaust ports 8 exhaust gases are released. When the piston 2 approaches the top dead center, the air accumulated in the additional chamber is opened and expanded. Water vapors

mixing with the residual gases in the cylinder 4 is further heated.

Thus, the proposed method of operating an internal combustion engine can increase the energy efficiency of the fuel by returning part of the heat of the exhaust gases by heating the air accumulated in the secondary chamber.

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VNIIPI Order 4701/38 Circulation 523 Subscription

Branch PPP "Patent, Uzhgorod, st. Project, 4

Claims (2)

1. WAY OF WORKING THE INTERNAL COMBUSTION ENGINE with liquid cooling by filling the cylinder with charge air, performing a compression stroke of the air in the cylinder and in the additional chamber, accumulating excess compressed air in the additional chamber, supplying fuel to the cylinder for burning the air-fuel mixture in the cylinder, heating the accumulated air with heat products combustion, supplying heated accumulated air to the cylinder, expanding it and combustion products in the cylinder during the expansion stroke m of work, supplying a mixture of exhaust gases and air to the afterburner, burning additional fuel in it and discharging exhaust gases from it for expansion in the turbine, characterized in that, in order to increase fuel energy efficiency, supply heated air from the additional chamber to the cylinder produce after the release of combustion products from the cylinder, carry out additional cycles of expansion of the air and its displacement and mix the air with the combustion products after their separate expansion. 2. The method according to π. 1, characterized in that water is injected into the accumulated air, which is preheated by the cooling liquid of the cooling system and the exhaust gases. SU ..., 1254185