KR20180124678A - exhaust pressure control and increase way for efficiency used adiabatic heat drop of internal combustion engine - Google Patents

Abstract

According to the present invention, provided are a device and a method for significantly increasing efficiency of an engine by controlling exhaust pressure of an internal combustion engine to which a turbocharger is attached using characteristics of the turbocharger, increasing acceleration ability and output, and significantly reducing harmful exhaust gas. At the same time, an adiabatic heat drop device is used to maximize efficiency of the engine by decreasing the suction temperature of the engine.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an exhaust gas pressure control method for an internal combustion engine,

Internal combustion engine

Various measures have been taken to reduce the exhaust loss in order to reduce the fuel of the internal combustion engine. An exhaust emission control device for reducing the exhaust pressure of the internal combustion engine and an exhaust pressure control device for increasing the exhaust pressure at high speed and falling at high speed (exhaust pressure regulator - applicant) have been studied.

Further, in order to increase the efficiency of the internal combustion engine, many studies have been made on the shape of the intake air of the internal combustion engine by various methods.

Increased efficiency of internal combustion engine and considerable reduction of harmful exhaust gas

The efficiency of the internal combustion engine is improved only if the exhaust pressure is appropriately adjusted. The reason for this is attributed to the fact that the top dead center of the piston according to the structure of the cam is not exactly the intake / exhaust time point. That is, in the explosion stroke process, the exhaust valve starts to open at an angle of about 55 degrees before the bottom dead center of the piston, so that the combustion gas is discharged in advance during the explosion stroke. So far, it is generally known that lowering the exhaust pressure only increases the efficiency of the internal combustion engine, but that is wrong.

Therefore, if the exhaust pressure of the internal combustion engine is generally raised, the discharge of the unburned gas discharged before the explosion stroke is reduced, the explosion stroke pressure is increased, and a greater force is generated in the explosion stroke.

However, when the exhaust pressure is excessively increased, exhaust in the exhaust stroke is not smooth, and back pressure is applied to the piston during the exhaust stroke, resulting in a loss. Therefore, it is necessary to adjust the exhaust pressure appropriately in order to achieve this phenomenon smoothly. Generally, the exhaust pressure should be raised at low speed (below about 2000 rpm), and the exhaust pressure should be lowered at high speed.

In this case, the longer combustion time may lead to a significant reduction in unburned fraction, a considerable reduction in harmful exhaust gas, and a significant increase in the efficiency of the engine.

Therefore, control of the exhaust pressure of the internal combustion engine is very important. Until now, however, it has been usually only interested in intake and atomization combustion of the engine, and unlike the present invention, the importance of the engine in the exhaust system has been overlooked.

Therefore, an exhaust gas extraction device has been studied for the purpose of smoothly extracting exhaust gas. However, due to the adverse effect at a low speed, there is almost no example in which an exhaust gas extraction device is actually attached.

For reference, the exhaust pressure control device of the internal combustion engine (the invention of the present invention, the engine efficiency of about 20% increased) was invented before the present invention, but commercialization was not carried out due to various problems of the exhaust pipe attachment. However, the present invention completely solves the problem of attachment by means of the apparatus and method attached to the intake pipe of the internal combustion engine and attempts to control the exhaust pressure using the operation principle and characteristics of the turbo, It is aimed to improve the efficiency of the engine with the effect of the exhaust pressure control by greatly increasing the intake air temperature of the internal combustion engine by attaching an adiabatic heat fall device to the intake pipe.

The principle of the exhaust pressure control using the turbo and the principle of the adiabatic thermal dropping device and the intake air temperature of the internal combustion engine are lowered are as follows.

1> Principle

1) The fan driven by the turbo charger generally consists of an axial flow fan at the inlet and a centrifugal fan at the outlet of the booster.

2) The driving turbine at the exhaust side for driving the turbocharger is composed of an axial flow type and a centrifugal type mixed turbine. In the case of an axial turbine, the increase in the number of revolutions that can be increased by the fluid relative to the rate at which the fluid is discharged is close to an infinite speed depending on the blade angle of the axial turbine. The reason is that the smaller the angle of inclination of the wing surface of the axial flow type wing is, the longer the rotation distance of the wing is compared to the moving distance of the fluid. However, the faster the rotation speed, the weaker the rotation torque becomes.

In the case of a centrifugal turbine, the turbo is rotated to the limit that the reverse pressure and the driving pressure are equal to each other. Therefore, the number of revolutions of the turbo is generally very fast and rises to about 100000 to 150000 rpm.

3) If centrifugal fans are closed by closing the outlet, the required power is greatly reduced.

However, in the case of the low pressure, in case of the high pressure, the shaft torque due to the pressure is required, and the required power is increased. The detailed reason is difficult to describe, so the description of the present invention is omitted. However, if only the resultant phenomenon is described briefly, the shaft power of the fan is "flow rate (Q) * pressure (P)". Therefore, when the pressure is high, the required power becomes very large even at a small flow rate. That is, the centrifugal fan should be a function of the flow rate only, but the shaft torque due to the pressure is required by the increase of the rotation of the fluid in the spiral direction in the fan.

4) If the pressure is changed by reducing the outlet or inlet of the fan, the change of the flow rate does not occur due to the changing pressure. The reason for this is that if the flow rate at the original pressure is Q, the pressure injection rate due to the differential pressure due to the reduction of the diameter of the pipe becomes "2 * P (pressure) / q density] In the relation of A (cross sectional area) V (flow velocity), even if the sectional area A is small, the pressure is greatly changed and V (injection speed) is increased. However, it corresponds to the case of pipe sectional area change within a certain range.

5) In the turbine of the exhaust side of the turbo, the discharge area of the exhaust gas decreases and the reverse pressure increases when the number of revolutions increases. That is, the faster the turbo rotation speed, the greater the enthalpy reduction in the turbo of the exhaust gas and the higher the exhaust pressure of the engine.

6) If the path of the air flowing into the inlet of the turbo is narrowed by the above-mentioned natural phenomenon principle, the rotation speed of the turbo is increased at the low speed of the engine, and the rotational speed of the turbo is increased at the high speed of the engine, The number of revolutions of the motor is prevented from increasing irregularly.

Therefore, it is possible to prevent the increase of the exhaust pressure due to the high rotation speed of the turbo at the high speed of the engine.

7) Therefore, when the engine speed is low, the exhaust pressure is increased, and when the engine speed is high, the rotation of the turbo is not restrained unrestrainedly, thereby preventing the surge of the exhaust pressure, thereby automatically and effectively controlling the exhaust pressure.

8) In the internal combustion engine, it is necessary to inject high-temperature high-pressure air into the intake port of the engine in order to improve the efficiency, but the efficiency such as unstable combustion is lowered. The reason for this is that the high temperature and high pressure air is compressed in the cylinder and the temperature after the compression increases much and the temperature after the explosion also increases a lot (of course, Because of the big day on, the explosive power to win it should be bigger, so you have to put a lot of fuel on it. However, the amount of high-temperature expanded air is insufficient to completely burn the fuel, resulting in unstable combustion, resulting in lower efficiency than when the air is cooled and injected.

9) However, the intercooler type, in which compressed air is cooled, is a state in which the heat energy that is discharged from the exhaust heat is converted into kinetic energy from the turbo, and then the heat energy is changed from the outlet of the turbo to the heat energy. It is the same as throwing away all the heat of exhaust.

The exhaust pressure control using the turbo of the present invention is equivalent to the recovery of exhaust heat.

10) In order to reduce the work in the compression stroke process, low-pressure low-temperature air must be injected to inject a small amount of fuel.

11) In order to obtain a high-pressure low-temperature air, an insulating thermal freefall device is required as shown in Fig.

12) The adiabatic heat fall-off device is a device in which the air sucked into the engine is introduced into the heat insulating wall (3) before and after the heat-insulating thermal overflow adjustment valve (2) So as to adjust the opening degree of the adiabatic thermal elimination adjusting valve 2 so as to generate the differential pressure between the front and the back. In this case, the air behind the adiabatic thermal overflow valve 2 is thermally expanded to reduce the temperature of the hot and warmed air and the front side of the regulating valve 2 to equalize the pressure. So that the temperature of the air on the discharge side is further lowered and flows into the engine.

15) Low pressure, low temperature, which greatly reduces the compression work of the engine.

16) Therefore, in this process of adjusting the opening degree of the regulating valve 2, the characteristic of the turbo is utilized, and a considerable part of the exhaust heat is recovered. Therefore, a highly efficient internal combustion engine can be constructed.

17) If the engine is not equipped with a turbo, it is possible to attach the fan to the engine separately as shown in FIG. That is, it can be made in the form of a supercharger to bring about the same effect.

18) Also, in the case of a gasoline engine in which the turbo is not generally used as shown in FIG. 4, the same effect can be obtained because the suction resistance of the engine is slightly increased and the compression stroke days are reduced.

(Note: Generally, in the case of the internal combustion engine equipped with the turbo intercooler, compared to the increase in the supercharging effect by the turbo, due to the reduction of the efficiency at the exhaust side due to the operation of the turbo in the non-restrained state, The efficiency of the engine is lowered, but the output of the engine is increased, that is, the turbo type is mainly used for outputting a larger output than the engine of a smaller size. However, in order to accurately describe the reason of the present invention, it is referred to in a relatively detailed manner. Further, if the technical principle in the present invention is accurately understood in the future, the efficiency of the engine Turbo intercooler type engine is widely reused for the increase Air will be.)

2> How to configure

In addition to the structure in accordance with the above principle, a method of attaching an adiabatic thermal freefall device together with the modification of the inlet pipe of the turbo by using or modifying the type of the pipe,

DETAILED DESCRIPTION OF THE INVENTION

- Significant efficiency increase of internal combustion engine, increase of life of turbo.

- Significant reduction of fuel consumption rate

- Increase engine output and acceleration capability

- Significant reduction of harmful exhaust gas

- Increase engine durability

And so on.

1 is a perspective view of a turbo-
Fig. 2 is a perspective view of an efficiency increasing method using the exhaust pressure control of the internal combustion engine and the adiabatic thermal head
Fig. 3 is a perspective view of an exhaust gas control method for an internal combustion engine equipped with a supercharger and an efficiency increasing method using a thermal head
Fig. 4 is a perspective view of an exhaust gas pressure control method and an efficiency increasing method using a thermal head in an internal combustion engine without a supercharger

1) In case of the internal combustion engine with turbo as shown in Fig. 2, an insulating thermal freefall device is installed as in the parts (1), (2), (3) and (4) .

2) As shown in FIG. 3, in the case of an internal combustion engine without a turbo, a separate pulley is drawn out to the main shaft of the engine and the fan 5 is additionally installed to allow air to flow into the intake port of the engine in the same manner as in the case of the turbo.

3) In case of a general gasoline engine which does not require turbo as shown in Fig. 4, it is possible to attach an adiabatic thermal falling device of (1), (2), (3) and (4) to the intake pipe of the engine, Only the air temperature is reduced.

The efficiency of the internal combustion engine is remarkably improved because the efficiency of the internal combustion engine is greatly increased, the output is increased, the acceleration capability is increased, and the harmful exhaust gas is greatly reduced.

1: Insulation heat Before suction lift 2: Insulation heat release adjustment valve
3: Insulation wall 4: Insulation heat After suction, suction piping 5: Internal combustion engine driven fan
6: Fan drive shaft

Claims (2)

(2), (3), and (4) is attached to the intake air pipe of the internal combustion engine to further subcool the intake air to adjust the exhaust pressure of the internal combustion engine And method of increasing efficiency by using thermal insulation The thermal insulation free fall apparatus according to claim 1,

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