KR20040110760A - Oxygen supply device of engine - Google Patents

Abstract

PURPOSE: An oxygen supply device of an engine is provided to facilitate development of an engine system by forming a unit for catalyzing and resolving hydrogen peroxide and producing pure oxygen and then supplying the produced oxygen to a combustion chamber of the engine. CONSTITUTION: An oxygen supply device of an engine comprises a hydrogen peroxide tank(1) storing hydrogen peroxide; a catalyzing and resolving part(2) resolving the hydrogen peroxide exhausted from the hydrogen peroxide tank into water and oxygen; an oxygen tank(3) storing the oxygen resolved in the catalyzing and resolving part; and an output valve(4) controlling the quantity of oxygen exhausted from the oxygen tank and supplied to a surge tank(13) formed to the inlet side of a suction manifold(11). The oxygen tank is connected to the catalyzing and resolving part by a connection pipe(6).

Description

Oxygen supply device of engine

The present invention relates to an engine oxygen supply apparatus, and in particular, due to the oxygen supply to achieve complete combustion in the combustion chamber to reduce the amount of exhaust gas, by adjusting the amount of oxygen supplied to the combustion chamber according to the operator's accelerator pedal operation In addition to improving the acceleration characteristics of the engine, it is advantageous for the production of high air-fuel ratio engines, and it is not only necessary to install various sensors for maintaining the theoretical air-fuel ratio, but also to develop an engine system because it does not have to develop a separate mapping program. The present invention relates to an engine oxygen supply device.

2 shows a conventional engine system,

Air passing through the intake duct passes through the air cleaner 14 to filter foreign matter, and is then supplied to the surge tank 13 through a throttle valve, and is distributed from the surge tank 13 to the intake manifold 11 to provide an engine ( 10) is supplied to each combustion chamber, and the exhaust gas generated by the combustion operation in the combustion chamber is discharged through the exhaust manifold 12, passes through the three-way catalyst 15, the harmful components are purified and then discharged into the atmosphere through the muffler. It is configured to be.

In the conventional engine system as described above, the amount of air supplied to the engine 10 for combustion is measured by the intake sensor AFS, the amount of air measured by the intake sensor AFS, and the signal detected from the oxygen sensor and According to the operation of the purge control solenoid valve (PCSV), the ECU analyzes and supplies the appropriate amount of fuel to the combustion chamber through the injector, so that the engine can be operated at the theoretical air-fuel ratio (14.7: 1) by this control process. Will be.

However, conventionally, since a system for supplying air for engine combustion, a large amount of harmful substances (NOx, carbon monoxide, hydrocarbons, etc.) are generated during combustion by substances other than oxygen contained in the air, for example, CO2 and N2. In order to remove these harmful substances, there has been a problem of having a three-way catalyst composed of expensive precious metals, and in order to suppress the amount of exhaust gas, air and fuel must be controlled to be supplied to the combustion chamber at an accurate theoretical fuel ratio. For this purpose, not only various sensors (oxygen sensor, intake sensor, etc.) have to be installed, but also the configuration of the overall engine system becomes very complicated, such as a data map for adjusting the fuel supply amount according to the information detected by each sensor. This was happening.

In addition, when developing an engine system that operates at a high air-fuel ratio such as lean burn or GDI engine, it is difficult to develop an improved engine because additional equipment has to be installed to suppress NOx, which is generated largely during combustion. Was doing.

Accordingly, the present invention for solving the above problems comprises a means for catalytically decomposing hydrogen peroxide to generate pure oxygen, and supplying the generated oxygen to the combustion chamber of the engine, to achieve a complete combustion in the combustion chamber to reduce the amount of exhaust gas generated It can reduce and improve the acceleration characteristics of the engine by adjusting the amount of oxygen supplied to the combustion chamber according to the driver's accelerator pedal, and it is advantageous for the production of high air-fuel engine, and various sensors are installed to maintain the theoretical air-fuel ratio. It is not intended to provide an oxygen supply device for an engine to facilitate the development of an engine system since it does not need to be developed and a separate mapping program is not required.

The present invention for achieving the above object,

In an engine system in which an intake manifold and an exhaust manifold are formed at both sides of an engine, and a surge tank is formed at an inlet side of the intake manifold,

A hydrogen peroxide tank for storing hydrogen peroxide;

A decomposition catalyst unit for decomposing hydrogen peroxide discharged from the hydrogen peroxide tank into water and oxygen by a catalytic reaction;

An oxygen tank connected to the decomposition catalyst unit by a connection pipe and storing oxygen decomposed in the decomposition catalyst unit;

An output valve controlling an amount of oxygen discharged from the oxygen tank and supplied to the surge tank; It is configured to include.

In addition, the output valve is adjusted to the opening amount according to the operator's operation of the accelerator pedal, characterized in that the water outlet pipe for discharging the water generated in the decomposition process in the decomposition catalyst portion is formed in the middle of the connection pipe.

1 is a view showing an oxygen supply device of the engine of the present invention.

2 shows a conventional engine system.

※ Explanation of code for main part of drawing

1: hydrogen peroxide tank 2: decomposition catalyst

3: oxygen tank 4: output valve

5: water pipe 10: engine

11 Intake manifold 12 Exhaust manifold

13: surge tank

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

In the description of the present invention, the same components as in the prior art will be denoted by the same reference numerals to avoid redundant description.

Reference numeral 1 denotes a hydrogen peroxide tank for storing a certain amount of hydrogen peroxide (H 2 O 2).

On the output side of the hydrogen peroxide tank 1, a decomposition catalyst unit 2 for catalytic decomposition of hydrogen peroxide to water (H 2 O) and oxygen (O 2) is connected.

Equation 1) → 2H2O2 → 2H2O + O2 + Heat generation

In general, hydrogen peroxide (H 2 O 2) is decomposed into water (H 2 O) and oxygen (O 2) as shown in Equation 1, and heat is generated as a result of this reaction, but the decomposition reaction of hydrogen peroxide is very slow under natural conditions. In 2) through the catalyst to promote the reaction rate of hydrogen peroxide to generate a large amount of oxygen.

Oxygen decomposed in the decomposition catalyst unit 2 is stored in the oxygen tank 3 through the connection pipe 6 is stored, the water discharge pipe 5 for discharging water in the middle of the connection pipe (6) Diverged.

The water discharged to the water discharge pipe 5 may be supplied to a reservoir tank for storing supplementary water for a radiator so that the driver does not have to worry about the lack of cooling water.

In addition, an output valve 4 for adjusting the amount of oxygen supplied to the surge tank 13 side is formed at the output side of the oxygen tank 3, and the output valve 4 is opened according to the driver's accelerator pedal operation. When the engine 10 is driven at a low speed so that the amount is controlled, a small amount of oxygen is supplied to the engine 10 correspondingly, and when the engine 10 is driven at a high speed, a large amount of oxygen is supplied to the engine 10. To be supplied.

Referring to the operation of the present invention configured as described above is as follows.

Regardless of whether the engine is driven or not, the decomposition catalyst unit 2 promotes decomposition of the hydrogen peroxide supplied from the hydrogen peroxide tank 1 so that a sufficient amount of oxygen is filled in the oxygen tank 3.

In this state, when the engine 10 is driven, the output valve 4 is opened according to the driver's accelerator pedal operation amount, and oxygen is discharged from the oxygen tank 3 to discharge each combustion chamber of the engine 10 through the surge tank 13. In the combustion chamber, the fuel injected from the injector and the oxygen supplied from the oxygen tank 3 are ignited in a mixed state to generate power.

Equation 2) CxHy + aO2 → bCO2 + cCO + dH2O + eH2 + fO2 (where a, b, c, d, e, f are constants)

When only oxygen (O2) is supplied to the combustion chamber as in the present invention, since the reaction equation of the gas generated by the combustion of fuel (CxHy) and oxygen (O2) proceeds as shown in Equation 2, NOx is not generated in the exhaust gas. Will not.

In the present invention driven as described above, since only oxygen is supplied to the combustion chamber, complete combustion of the fuel can be achieved, and thus, generation of nitrogen oxides (NOx), which are conventionally generated, can be suppressed. It is possible to lower the overall price of the vehicle because the three-way catalyst is not installed in the exhaust system.

In addition, various sensors required for air-fuel ratio control do not need to be applied to the engine system, thereby simplifying the structure of the engine system, and not having to construct a separate data map for air-fuel ratio control. You can expect the effect to be possible.

As described above, the present invention constitutes a means for catalytically decomposing hydrogen peroxide water to generate pure oxygen, and supplying the generated oxygen to the combustion chamber of the engine, thereby reducing the amount of exhaust gas generated by perfect combustion in the combustion chamber. In addition, it is possible to improve the acceleration characteristics of the engine by adjusting the amount of oxygen supplied to the combustion chamber according to the driver's operation of the accelerator pedal, and it is advantageous to manufacture a high air-fuel ratio engine, and it is not necessary to install various sensors for maintaining the theoretical air-fuel ratio. In addition, since it is not necessary to develop a separate mapping program, it can be expected to provide an oxygen supply device for the engine to facilitate engine system development.

Claims (3)

In an engine system in which an intake manifold and an exhaust manifold are formed at both sides of an engine, and a surge tank is formed at an inlet side of the intake manifold, A hydrogen peroxide tank 1 for storing hydrogen peroxide; A decomposition catalyst unit (2) for decomposing hydrogen peroxide discharged from the hydrogen peroxide tank (1) into water and oxygen by a catalytic reaction; An oxygen tank (3) connected to the decomposition catalyst unit (2) by a connection pipe (6) and storing oxygen decomposed in the decomposition catalyst unit (2); An output valve 4 for controlling the amount of oxygen discharged from the oxygen tank 3 and supplied to the surge tank; Oxygen supply device for the engine, characterized in that configured to include. The method of claim 1, The output valve (4) is the oxygen supply device of the engine, characterized in that the opening degree is adjusted according to the driver's accelerator pedal operation. The method of claim 1, In the middle of the connecting pipe (6), the oxygen supply device for the engine, characterized in that the water outlet pipe (5) for branching is formed for the discharge of water generated in the decomposition process in the decomposition catalyst (2).