RU151185U1 - PRE-PREPARATION SYSTEM FOR INTERNAL COMBUSTION ENGINE - Google Patents

Abstract

The pre-start preparation system for an internal combustion engine, consisting of a battery, an engine, main bearings, a casing of the engine crankcase, a heater, a supply of hot air to the main bearings, a supply of hot air to the cylinders, a guide casing of the cooling fan, characterized in that an air manifold with individual air supply to the cylinders and their heads, an air damper for supplying hot air to the cylinders, an electric motor, on the shaft of which is installed there is a fan for air supply, a heat generator mounted on the wall of the heater heat exchanger, which is a heat transfer device consisting of a cylindrical body in which a heat exchanger with a pulsating combustion chamber and a resonant tube is placed, which has an input and outputs for air and an output for combustion products .

Description

The utility model relates to the field of mechanical engineering, mainly for multi-purpose equipment, as well as tracked vehicles, as a pre-launch preparation system for internal combustion engines to facilitate their start-up at low temperatures.

A device is known for facilitating the starting of an internal combustion engine (see USSR author's certificate No. 983301, 1982), comprising a liquid heater equipped with a boiler with a combustion chamber for heating the coolant, a fuel supply pump to the nozzle installed in the combustion chamber, an air blower in the chamber combustion, a coolant pump placed on the motor shaft, and a pipe for the removal of combustion products with an oil pan heater, a pipe for the removal of products of combustion it is made with branching into two pipelines, the first of which is connected to the engine intake manifold, and the second, equipped with an oil heater, is connected to the engine tray, and at the point of branching there is an organ for mutually changing the passage sections of pipelines.

A disadvantage of the known device is that during its operation, the combustion products are sent to the intake manifold of the engine and its pan, which causes carbon formation on the walls of the engine cylinders and parts of the crank mechanism, and long-term operation of the liquid heater at negative ambient temperatures leads to a significant discharge rechargeable batteries.

Closest to the proposed pre-start preparation system for an internal combustion engine is the air-cooled D-30C diesel engine heating system (see: Nikolaev L.A., Stashkevich A.P., Zakharov I.A. “Tractor diesel engine heating systems at start-up”. Moscow, Mechanical Engineering, 1977, pp. 113-117, Fig. 49), containing a storage battery, an engine, main bearings, an engine oil pan cover, a heater, a supply of hot air to the main bearings, a supply of hot air to the cylinders, a guiding cover veins ilyatora cooling system.

A disadvantage of the known air-cooled diesel engine heating system is that long-term operation of the heater at negative ambient temperatures leads to a significant discharge of batteries, as well as uneven heating of the cylinders and their heads during operation, which leads to a decrease in the reliability of engine start-up under negative temperatures.

The objective of the proposed utility model is to improve the quality of heating the internal combustion engine to ensure reliable start-up in conditions of negative temperatures, reducing the warm-up time of the internal combustion engine, and reducing the cost of electric energy on-board batteries.

The essence of the utility model is that in an air-cooled diesel engine heating system containing a battery, an engine, main bearings, an engine oil pan cover, a heater, a hot air supply to the main bearings, a hot air supply to the cylinders, a system fan guide casing cooling, additionally introduced an air manifold with individual air supply to the cylinders and their heads, an air damper for supplying hot air to the cylinders, an electric motor a heater, on the shaft of which a fan for supplying air is installed, a heat generator mounted on the wall of the heater heat exchanger, which is a heat transfer device consisting of a cylindrical body in which a heat exchanger with a pulsating combustion chamber and a resonant tube having an inlet and outlets for air and outlet for combustion products.

Unlike the known system, hot air is supplied to the cylinders through an air collector with individual air supply to the cylinders and their heads, and the electromagnetic pump is replaced by a low-pressure air compressor assembled with an electric motor.

Thus, the claimed system pre-launch preparation of an internal combustion engine meets the criterion of "novelty."

Comparison of the proposed solution with other technical solutions shows that a pulsating combustion chamber with a resonant tube is widely known (see source: K. Davydov, “Theory of Aircraft Jet Engines.” Part 2. Direct-flow, pulsating and jet engines, Kharkov, KhVAIVU, 1955, p. 43).

However, with the introduction of a pulsating combustion chamber with a resonant tube and a heat generator in this connection with the rest of the circuit elements in the inventive pre-treatment system of the internal combustion engine, the system exhibits new properties, which allows us to conclude that the technical solution meets the criterion of "significant differences".

The proposed system pre-launch preparation of the internal combustion engine is presented in the figure.

It consists of a casing of the oil pan of the engine 1 with the intake and exhaust pipelines of combustion products, a heat transfer device 2, an electric motor 3 assembled with a fan 4, a heat generator 5, a heat exchanger 6, a pulsating combustion chamber with a resonant pipe 7, and supply of hot air to the main bearings 8, the supply of hot air to the cylinders 9, the air damper 10 for supplying hot air to the cylinders, an air manifold with individual air supply to the cylinders and their heads 11, the heat transfer device being 2 hours Res output and receiving the combustion products line connected to the sump housing 1, through the outlet conduit and a hot air inlet 8 is connected to the crankcase and through the hot air inlet 9, the air damper 10, the air manifold 11 to the engine cylinders and heads.

A fan 4, installed at the air inlet of the heat transfer device 2, is rigidly connected through the shaft to an electric motor 3, which is connected through an electric circuit to a heat generator 5, mounted on the end wall of the heat exchanger 6, in which a pulsating combustion chamber with a resonant tube 7 is installed.

The fuel mixture into the combustion chamber of the heat transfer device 2 comes from its own fuel tank due to the excess pressure created by the low-pressure compressor with an electric drive from the battery (not shown in the figure).

Ignition of the fuel mixture in the combustion chamber is carried out by an electric spark ignition system with a remote control panel using a spark plug, a transistor switch and a battery (not shown in the figure).

After the heat transfer device 2 has reached a stable mode of operation, the supply of voltage from the battery to the spark ignition system and the low-pressure compressor with an electric drive is stopped. Burning in a pulsating combustion chamber with a resonant tube 7 is maintained automatically without the expense of electric energy of the battery.

The system of pre-preparation of the internal combustion engine operates as follows.

When the start valve on the control panel is turned on, the fuel in the system’s own tank is displaced by the excess pressure generated by the low-pressure compressor with an electric drive (not shown in the figure) and enters the combustion chamber of the heat transfer device 2, where it is mixed with air pumped by the same compressor and ignites from a spark plug (not shown in the figure). Hot products of combustion from a pulsating combustion chamber with a resonant pipe 7 pass through a heat exchanger 6, heat its walls and transfer heat to the air flow pumped by a fan 4 driven by an electric motor 3, which is sent through an exhaust pipe from a heat transfer device 2, hot air inlets 8 and 9 to main bearings and engine cylinders. The engine is heated by hot air supplied both to the internal cavity of the crankcase and to the cylinders and their heads.

Part of the injected air from the heat transfer device 2 through the supply of hot air to the main bearings 8 is fed into the internal cavity of the crankcase, it transfers part of the heat to the main bearings, and the rest is transferred to other parts of the crank mechanism, as well as to the oil located in the oil pan. To release air from the inner cavity of the crankcase, a breather is used (not shown in the figure).

Another part of the injected air from the heat transfer device 2 through the supply of hot air to the cylinders 9 is directed through an open air damper 10 to the air manifold with individual air supply to the cylinders and their heads 11 and through the open intake valves (for example, using a decompression mechanism) enters the engine cylinders through the open exhaust valves leaves the cylinders in the exhaust manifold of the engine. When hot air moves through the air manifold with individual air supply to the cylinders and their heads 11, intense heat transfer of gases and heating of the parts of the intake tract and combustion chambers of the engine are carried out. This ensures that the intake air is heated when the engine starts, increasing the compression temperature and shortening the start time.

The air damper 10 for supplying hot air to the cylinders 9 opens when the engine warms up before starting, allows hot air with overpressure to pass through the inlet tract to the cylinders at the time of start-up and closes when the engine is running stably.

The combustion products from the heat transfer device 2 are piped into the casing of the engine crankcase 1 and the oil is heated.

The heat generator 5, mounted on the end wall of the heat exchanger 6, due to the temperature difference between its sides, converts thermal energy into electrical energy and ensures autonomous operation of the electric motor 3 assembled with a fan 4 for suction and discharge of air, as well as the battery charge (not shown in the figure )

Introduction to the system pre-launch preparation of the internal combustion engine heat transfer device 2 will allow:

- to provide automatic maintenance of combustion in a pulsating combustion chamber with high thermal power without the expense of electrical energy of onboard batteries;

- maintain the charge of the batteries, preventing them from being discharged.

This allows you to reduce time and improve the quality of heating of the internal combustion engine, ensuring its reliable start.

Claims (1)

The pre-start preparation system for an internal combustion engine, consisting of a battery, an engine, main bearings, a casing of the engine crankcase, a heater, a supply of hot air to the main bearings, a supply of hot air to the cylinders, a guide casing of the cooling fan, characterized in that an air manifold with individual air supply to the cylinders and their heads, an air damper for supplying hot air to the cylinders, an electric motor, on the shaft of which is installed there is a fan for air supply, a heat generator mounted on the wall of the heater heat exchanger, which is a heat transfer device consisting of a cylindrical body in which a heat exchanger with a pulsating combustion chamber and a resonant tube is placed, which has an input and outputs for air and an output for combustion products .

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