RU45463U1 - ENGINE WITH EXTERNAL HEAT SUPPLY - Google Patents

Abstract

The proposal relates to mechanical engineering, namely to engine building) and can be used as a power plant to obtain effective power. The engine with an external heat supply has a piston engine, including a crankcase 1 with a cylinder 2, in which a piston 3 with a crank mechanism 4 is installed. On one side of the crankcase 1 there is an inlet pipe 5 with a valve, and on the other pipe 6 for supplying compressed air to the chamber combustion 7 through the intake valve 8. In the combustion chamber 7 are placed: a spark plug 9, a nozzle 10 for supplying fuel and an exhaust valve 11 for releasing hot gases through a heat exchanger 12 into the over-piston space of the cylinder 2. In the over-piston space of the cylinder 2 d To supply water to the cylinder, nozzle 13 is installed. The mixture, steam and hot gases, having completed work, exit through the exhaust valve of cylinder 14. 1 c.p. f-ly, 1 ill.

Description

The proposal relates to mechanical engineering, namely to engine building and can be used to obtain effective power. Known engines with external heat supply.

An engine with external combustion (US patent F 01 k 21/04 No. 3728858) uses the energy of the steam injected at the end of the compression stroke into the power cylinder from the steam boiler, operates on a push-pull cycle. Combustion products from the furnace placed in the steam boiler are injected into the engine cylinder after the expansion stroke. These combustion products are then compressed by a piston, and their heat is used to heat the feed water circulating in the jacket of the master cylinder.

The disadvantage of this engine is that the steam pressure in the steam boiler should be much higher than the pressure in the cylinder at the end of the compression stroke, therefore, for a short period of time, a large amount of steam does not have time to get into the cylinder, therefore, the effective efficiency of this engine is low.

Known utilization engine with external heat supply (Bogdanov A.I., Kukis V.S., Rudnev V.V. and others. Utilization engine with external heat supply: Certificate for flight model No. 15914, issued November 20, 2000), having a piston engine, including a block with a cylinder, in which the piston moves with a crank mechanism. On one side of the unit there is an inlet pipe with an inlet valve,

with another nozzle with a discharge valve for supplying compressed air to the boiler. The boiler contains: a coil for heating water, a spark plug and a nozzle for supplying fuel to the boiler. Heated air is pumped into the cylinder through the intake manifold and the purge window. Exhaust gases exit through a purge window and an exhaust manifold. An electromagnetic nozzle of water injection is fixed above the cylinder.

The disadvantage of this recovery engine is the relatively low efficiency due to large heat losses in the boiler.

This engine design is the closest to the proposed technical essence and adopted as a prototype.

The objective of the proposal is to increase the efficiency of the engine with an external supply of heat.

The problem is achieved in that in an engine with an external heat supply containing a piston engine with a crank mechanism, with injection of water heated in the heat exchanger at the beginning of the expansion stroke and an air heating device, characterized in that it is equipped with a combustion chamber for heating air , in which the inlet and outlet valves are located, separately from it a heat exchanger for heating the injected water and an exhaust valve of the cylinder for exhaust gas.

An analysis of the proposed solution and the known ones allows us to conclude that it meets the patentability conditions of the utility model.

The proposal is illustrated in the figure (figure 1), which shows the basic structure of the engine with an external supply of heat.

The proposed engine with an external heat supply contains: a piston single-cylinder two-stroke engine including a crankcase 1 with a cylinder 2, in which a piston 3 with a crank mechanism 4 is installed. On one side of the crankcase 1 there is an inlet pipe 5 with a valve, and on the other a pipe 6 for supplying compressed air into the combustion chamber 7 through the inlet valve 8. In the combustion chamber 7 are placed: a spark plug 9, a fuel injector 10 and an exhaust valve 11 for releasing hot gases through a heat exchanger 12 into the piston space above the cylinder 2. overpiston space cylinder 2 for supplying water to the cylinder is set nozzle 13 and the exhaust valve 14 of the cylinder.

The proposed engine with an external supply of heat operates as follows.

The air entering the engine block 1 through the inlet pipe with valve 5 is pumped by means of a crank mechanism 4 into the pipe 6, then into the combustion chamber 7 through the inlet valve 8. After closing the inlet 8 and exhaust 11 valves of the combustion chamber 7, the incoming through the nozzle 10, the fuel mixes with air and burns, igniting from the spark plug 9. The temperature and pressure in the combustion chamber increase, and when the exhaust valve 11 is opened, hot air, having given off some of the heat in the heat exchanger 12, enters cylinder 2. Where into the cut ultate

mixing water and hot air injected through the nozzle 13, superheated steam is formed, which presses on the piston 3, moving it to the bottom dead point making a working stroke. Exhaust gases are emitted into the atmosphere through the exhaust valve of the cylinder 14 when the piston 3 moves to top dead center.

Compared with the prototype, the proposed engine with external heat supply has the following advantages: it allows to increase the effective efficiency due to the use of a separate combustion chamber in the piston engine and the supply of hot air from it through the valve to the over-piston space, which increases the efficiency of the engine and allows us to conclude to achieve the task.

Claims (1)

An engine with an external heat supply, comprising a piston engine with a crank mechanism, with injection of water heated in the heat exchanger at the beginning of the expansion stroke and an air heating device, characterized in that it is equipped with a combustion chamber for heating the air in which the intake and exhaust valves, separately made by a heat exchanger for heating the injected water and an exhaust valve of the cylinder for exhaust gas.