JPS618456A - Device for saving fuel for increasing output power in diesel-engine - Google Patents

Abstract

PURPOSE:To aim at purifying exhaust gas and at enhancing the output power of a Diesel-engine, by utilizing exhaust gas from the engine to preheat intake-air in order to raise the temperature of compressed air, and by making the jet port of a fuel injection nozzle in a fine size to promote atomization of fuel. CONSTITUTION:An air-heater 6 disposed in an exhaust pipe 5 is heated up to a high temperature during exhaust stroke of a diesel-engine 1. Meanwhile the ambient air is introduced through an air-filter 15 under action of intake-vacuum effected in an intake-air pipe 11, and then is introduced into the air-heater 6 through an air-fuel ratio regulator 7 and an air-pipe 8 under action of intake- vacuum acting upon a heated air injecting flange 12 so that the ambient air is heated up to a predetermined temperature. Further, this high temperature intake- air is introduced into a cylinder 2 to enhance the efficiency of combustion. Meanwhile fuel injected from a nozzle 13 is completely atomized by means of a fine-size hole 14 formed in the tip end of the nozzle 13. With this arrangement it is possible to attain the purification of exhaust gas and the enhancement of output power of the engine.

Description

[Detailed description of the invention] Industrial applications This invention relates to a diesel engine.

Conventional technology Diesel engines suck air and compress it with a piston to a high temperature of 500 to 600°C.
Fuel is injected into a high-pressure cylinder and ignited and combusted by the heat of compressed air.

However, although various methods have been developed to completely ignite and burn (explode) the fuel, they are still not perfect, and the exhaust gas contains harmful substances, which becomes a social problem, and the output is not sufficient. There were drawbacks such as not being able to obtain

Problems to be Solved by the Invention In order to solve the above-mentioned drawbacks, the present invention preheats the intake air with the exhaust gas of a diesel engine to increase the temperature of the compressed air, and furthermore, the injection port of the fuel injection nozzle is made into a micro-hole. By promoting atomization, the exhaust gas is purified by promoting complete combustion of the fuel within the cylinder, and furthermore, the output can be improved and fuel consumption can be reduced.

A foolproof way to solve problems Hereinafter, the present invention will be explained in detail with reference to embodiment figures.

An air heater 6 using a spiral pipe is inserted into an exhaust pipe 5 extending from an exhaust manifold 4 that communicates with the cylinder and cylinder 2 of the diesel engine 1 via an exhaust valve 3.
A heated air injection flange 12 is connected to an intake pipe 11 extending from an intake manifold 10 that communicates with the cylinder 2 via an intake valve 9. The other end of the heated air injection flask 12 and the air heater 6 are communicated through an air pipe 2', and a large number of fine holes 14 are formed at the tip of the fuel injection nozzle 13, which communicates with the head of the cylinder 2. It is made to have holes.

In addition, in the figure, 15 indicates an air filter, and 16 indicates an accelerator pedal.

action, effect Next, the effects of the present invention will be explained with reference to embodiment figures.

Figure 1 shows a 4-stroke diesel engine, in which the piston in the cylinder 2 reciprocates twice to generate air intake and
The four steps of compression, explosion, and exhaust are repeated in sequence.

The air heater 6 is heated to a high temperature by the gas exhausted from the exhaust pipe 5, and during the intake stroke of the piston of the cylinder 2, negative suction pressure acts on the intake pipe 11 and the air filter 15 is heated.
The outside air is drawn in, and at the same time the heated air injection flange 12
Negative suction pressure acts on the air to draw outside air into the air heater 6 via the air-fuel ratio regulator 7 and the air pipe 8, raising the temperature to a high temperature.
The air heated to a high temperature is blown into the intake pipe 11 from the heated air injection 7 lange 12 via the air pipe 8', and the inhaled outside air is heated to a high temperature by the heated air, and the cylinder 2 is heated to a high temperature.
Therefore, in the next compression stroke, the temperature of the compressed air inside the cylinder 2 further rises, and at the same time, the fuel injected from the fuel injection nozzle 13 is completely atomized by the fine holes 14 at the tip of the nozzle. Complete combustion is promoted. Therefore, CO, HC, No, etc. in the exhaust gas of the diesel engine are extremely reduced, preventing the occurrence of pollution caused by the exhaust gas, and the complete combustion of the fuel improves the engine output and saves fuel. be. It also has the remarkable effects mentioned above, such as being able to prevent the occurrence of knocking in the winter.

[Brief explanation of the drawing]

FIG. 1 is a system diagram of a diesel engine equipped with an output increasing mechanism according to an embodiment of the present invention, and FIG. 2 is a partially enlarged front view of its fuel injection nozzle. 1 Diesel engine, 2 cylinders, 5 exhaust pipes, 6 air heaters, 7 air-fuel ratio regulators, 8, 8' air pipes, 11 intake pipes, 12 heated air injection 7 langes, 13 fuel injection nozzles, 1
4 micropores Figure 2

Claims (1)

[Claims] 1. Insert an air heater into the exhaust pipe of the diesel engine, communicate the air-fuel ratio regulator with one end, communicate the heated air injection flange with the intake pipe, and communicate the other end of the air heater with the heated air injection flange. An output increasing fuel saving device for a diesel engine, characterized in that a large number of fine holes are formed at the tip of a fuel injection nozzle communicating with a cylinder head.