KR100351794B1 - Fuel additive for increasing octane number - Google Patents

Abstract

The present invention relates to an automotive fuel additive for improving fuel efficiency, and provides an automotive fuel additive composition consisting of 10-70% by weight of MTBE and 10-70% by weight of methyl naphthalene.

The composition of the present invention can prevent abnormal combustion of an automobile engine by increasing the octane number of automobile fuel.

Description

FUEL ADDITIVE FOR INCREASING OCTANE NUMBER}

The present invention relates to an automotive fuel additive for improving fuel economy. More specifically, the present invention relates to an automobile fuel additive for improving fuel efficiency, which increases octane number to reduce abnormal combustion of an automobile engine.

Gasoline, which is widely used as an automobile fuel, is about 200 kinds of hydrocarbon compounds such as paraffinic, naphthine, olefin and aromatic, and paraffinic is 50 ~ 60%, and occupies the largest proportion. Paraffin system is composed of normal heptane low anti-knocking and isooctane with high knock resistance. The more components of isooctane, the higher the knock resistance. The octane number refers to the ratio of isooctane in the mixing ratio of normal heptane and isooctane in the paraffinic component. For example, the octane number becomes 80 if 20% of normal heptane and 80% of isooctane are contained. However, since this method cannot produce more than 100 high octane number and is expensive, many methods of increasing the octane number using an anti-rust agent called 4 ethyl lead are widely used. Since the late 1980s, lead compounds themselves are pollutants, and because they have a great impact on air pollution, the use of leaded gasoline has been discontinued. Instead, the use of lead-free gasoline with a substance called methyl tertialry butyl ether (MTBE) It is universal. Normally, the octane number of gasoline is about 86 to 88, and the quality of gasoline is about 92 to 98. All gasoline on the market is high-grade unleaded gasoline, which is the best specification for all domestic motorcycles.

Octane number is also an indicator of fuel spontaneity. As the octane number increases, the volatility decreases. Abnormal combustion, including the autoignition of automobile engines, is mainly caused by the overheating of the mixer before the combustion occurs, and it is necessary to increase the octane number before such abnormal combustion occurs.

Specifically, when the octane number is required to increase, the compression ratio of the engine is increased and the temperature of the mixer is increased, so that abnormal combustion is likely to occur, the cylinder bore is increased, the maximum flame propagation distance is long, and abnormal combustion occurs near the crevis region. When the possibility increases, if the temperature of the mixer is increased by using a cast iron engine head having a relatively low thermal conductivity compared to an aluminum block, and abnormal combustion is likely to occur, the temperature of the cooling water increases to 90 ° C or more, causing spontaneous combustion. When the ignition timing is advanced to increase the output of the engine, when the combustion occurs at a high pressure in the combustion chamber, and the possibility of abnormal combustion increases, the intake temperature is increased due to factors such as supercharging, and thus it is easy to cause spontaneous combustion. , The humidity of the intake air flowing into the engine is lowered, If an easy-to-life and highly increases the pressure of the air under the influence of such, and the like when the pressure of the intake air flowing into the combustion chamber is relatively higher it is also the chair higher risk of fire. Therefore, there is a need to further increase the octane number of the fuel in order to reduce the abnormal combustion of the automobile engine and to increase the power and torque.

On the other hand, products that improve conventional fuel economy include Bulls One Shot and Redex, but Bulls One Shot does not directly increase octane number as an engine cleaner, and Redex also improves fuel efficiency by removing old engines. The result is reduced incomplete combustion, which can overwhelm the engine and release harmful gases.

Accordingly, an object of the present invention is to provide an automotive fuel additive that can improve the output and torque by preventing abnormal combustion by increasing the octane number of the automobile fuel. It is also to provide automotive fuel additives that improve fuel economy and reduce emissions of carbon monoxide and hydrocarbon compounds.

According to the invention,

An automotive fuel additive composition is provided which consists of 10-70% by weight MTBE and 10-70% by weight methyl naphthalene.

MTBE (Methyl Tertialry Butyl Ether) included in the composition of the present invention is a compound produced by reacting isobutylene olefins with methanol and contains oxygen atoms in the molecule to reduce the generation of nitrogen oxides and carbon monoxide. A substance used in gasoline mixtures. In addition, the MTBE has a very high octane number of about 118, contributing to the improvement of the octane number of gasoline. The MTBE is included 10-70% by weight based on the total weight of the composition. If MTBE is included in less than 10% by weight based on the total weight of the composition, since the amount of methyl naphthalene is relatively increased, the boiling point of the composition is increased, the temperature inside the engine is increased, and the output may be reduced, and also 70% by weight If it is included as above, the boiling point is lowered, it does not help to increase the output at high speed, there is a risk of spontaneous ignition. Preferably the MTBE is included 40-50% by weight based on the total weight of the composition.

Methyl naphthalene included in the composition of the present invention is an aromatic hydrocarbon material is a bicyclic naphthalene derivative, and the octane number is very high at about 130, which also contributes to the improvement of the octane number of gasoline and increases the engine output. Methyl naphthalene is included at 10-70% by weight based on the total weight of the composition. When the methyl naphthalene is contained in an amount of 10% by weight or less based on the total weight of the composition, the amount of MTBE is relatively increased, so the boiling point is lowered, which does not help to increase the output at high speed, and there is a risk of spontaneous ignition and more than 70%. If included, the boiling point is increased, the output may be reduced due to the temperature rise inside the engine. Preferably the methyl naphthalene is included 40-50% by weight based on the total weight of the composition.

The composition of the present invention may further comprise an organic solvent in addition to the MTBE and methyl naphthalene. The organic solvent which can be used for the composition of this invention contains an aromatic organic solvent. The organic solvent is preferably included up to 10% by weight based on the total weight of the composition. If the organic solvent is included in more than 10% by weight of the composition of the present invention may increase the harmful emissions due to the organic solvent.

The composition of the present invention made as described above is preferably used by adding 1-10% by volume to automotive fuel. When the composition of the present invention is added to the vehicle fuel less than 1% by volume octane number improvement does not occur, when added to more than 10% by volume may increase the NOx and harmful emissions.

The present invention will be described in more detail with reference to the following examples.

Example

The fuel additive composition of the present invention was prepared by mixing 50% by weight MTBE and 50% by weight methyl naphthalene based on the total weight of the composition.

1. Octane number test

The composition was added to general gasoline and high gasoline at a rate of 10 ml / L, respectively, and the octane number before and after addition was measured by the test method of ADTMD2699, and the results are shown in Table 1 below. The test car was Traze XG (production year 1999).

Octane test report Before addition After addition Remarks General gasoline 92-93 RON 95-95.5 RON 3-3.5 RON increase Advanced gasoline 97.5-98 RON 100-100.5 RON 2.5-3 RON increase

As shown in Table 1, it can be seen that the octane number after the addition of the composition of the present invention increases in both general gasoline and higher gasoline.

2. Power Performance Evaluation

The composition was added to the gasoline at a rate of 10 ml / L, and before and after the addition, the output and torque were measured using a chassis dynamometer, and the results are shown in Tables 2 and 3, respectively. Each test was repeated three times. The test car was the Hyundai Avante XD 2.0.

Output measurement result 1st test rpm 1500 2000 2500 3000 3500 4000 4500 5000 5500 Output before addition (ps) 27 38 53 66 74.5 90 103 108 120 Output after addition (ps) 28 41 56 69 77 92 105 111 124 Output increase / decrease (ps) +1 +3 +3 +3 +2.5 +2 +2 +3 +4 2nd test rpm 1500 2000 2500 3000 3500 4000 4500 5000 5500 Output before addition (ps) 27 38 53 66 74.5 90 103 108 120 Output after addition (ps) 28 42 56 70 76 93 105 110 123 Output increase / decrease (ps) +1 +4 +3 +4 +1.5 +3 +2 +2 +3 3rd test rpm 1500 2000 2500 3000 3500 4000 4500 5000 5500 Output before addition (ps) 27 38 53 66 74.5 90 103 108 120 Output after addition (ps) 27 41 57 69 77 94 106 111 124 Output increase / decrease (ps) 0 +3 +4 +3 +2.5 +4 +3 +3 +4

Torque measurement result 1st test rpm 1500 2000 2500 3000 3500 4000 4500 5000 5500 Torque before addition (kgm) 12.4 14.6 15.5 15.4 15.3 15.8 15.8 15.5 15.6 Torque after addition (kgm) 12.8 19.0 16.6 16.0 16.4 16.8 16.8 16.8 16.0 Torque increase / decrease rate (kgm) +0.4 +4.4 +1.1 +0.6 +1.1 +1.0 +1.0 +1.3 +0.4 2nd test rpm 1500 2000 2500 3000 3500 4000 4500 5000 5500 Torque before addition (kgm) 12.4 14.6 15.5 15.4 15.3 15.8 15.8 15.5 15.6 Torque after addition (kgm) 12.6 17.0 16.8 16.1 16.5 17.0 16.8 16.9 16.5 Torque increase / decrease rate (kgm) +0.2 +3.4 +1.3 +0.7 +1.2 +1.2 +1.0 +1.4 +0.9 3rd test rpm 1500 2000 2500 3000 3500 4000 4500 5000 5500 Torque before addition (kgm) 12.4 14.6 15.5 15.4 15.3 15.8 15.8 15.5 15.6 Torque after addition (kgm) 12.7 17.5 16.6 16.0 16.2 16.8 16.8 16.8 16.0 Torque increase / decrease rate (kgm) +0.3 +3.1 +1.1 +0.6 +1.1 +1.0 +1.0 +1.3 +0.4

When the composition of the present invention is added as shown in Tables 2 and 3, it can be seen that the output is improved in all rotational regions, and in particular, the rotational force (torque) is improved in the mid-low rotation region and the high rotation region. have.

3. Fuel economy inspection

The composition was added to gasoline at a rate of 10 ml / L and the fuel efficiency (measured in LA 4 mode) before and after addition was measured and the results are shown in Table 4 below. The test car was Traze XG (production year 1999).

Fuel economy measurement result Before addition After addition Fuel economy 1st test 7.63km / l 8.53 km / l + 0.90km / l Second test 8.12 km / l 8.98 km / l +0.86 km / l

As shown in Table 4, when the composition of the present invention is added, it can be seen that the fuel economy is improved on average 0.88 km / l.

4. Checking the suitability of fuel (petrol)

In order to test the suitability of gasoline containing 1% by volume (10 ml / l) of the composition of the present invention, fuel inspection was carried out according to the manufacturing standard test method (related to Table 4) of automobile fuel. The results are shown in Table 5 below.

Automotive fuel suitability test results of the composition of the present invention Test Items standard Test result Aromatic Compound Content 35 or less (% by volume) 7 Benzene Content 2 or less (% by volume) 1 or less Oxygen content 2.3 (% by weight) or less 1.4 Olefin Content 23 or less (% by volume) 17 Sulfur content Less than 200ppm 114 Vapor pressure 82 (kpa, 37.8 ℃) or less 64 Phosphorus content 0.0013 (g / l) or less Less than 0.0001 90% outflow temperature 175 (℃) or less 163 Final suitability fitness

5. Hazardous Substance Inspection

Inspection of harmful substances of the composition of the present invention was carried out according to the hazardous substance inspection method of the attached Table 5 additives and harmful substances and exhaust gas inspection. All of the tests were judged to be suitable.

Hazardous Substance Test Results Measured substance Al Fe Ni CD Mn Cu Zn Cr Pb Concentration after addition (mg / l) Not detected Not detected Not detected 0.17 0.88 Not detected Not detected Not detected 0.38

Emission Gas Test Results Test Items Exhaust Gas Concentration (CVS-75) smoke CO (g / km) HC (g / km) PM (g / km) (%) Before addition 1.34 0.14 - - After addition 1.07 0.13 - - increase% ↓ 7.14 ↓ 20.15 - -

* Car model for inspection: TRAJET (year of manufacture: 1999)

Cumulative driving distance before test: 12610km, Cumulative driving distance after test: 12849km

Addition standard: 10ml / l

In addition, the composition of the present invention was added to the gasoline in 2% by volume (20ml / l) to perform a gasoline conformity test and harmful substance test in the same manner as described above, and showed similar results to Tables 6 and 7 The exhaust gas concentrations of CO and HC decreased by 43.0% and 18.8%, respectively.

As can be seen in Tables 6 and 7, the composition of the present invention is detected with low harmful substances and also reduces the amount of exhaust gases such as carbon monoxide and hydrocarbon compounds.

The composition of the present invention can further increase the octane number of the vehicle fuel to prevent abnormal combustion of the engine to improve power and torque, and also improve fuel economy and reduce the emission of carbon monoxide and hydrocarbon compounds.

Claims (6)

Automotive fuel additive composition consisting of 10-70% by weight MTBE and 10-70% by weight methyl naphthalene. The composition of claim 1, wherein the MTBE is 40-50% by weight based on the total weight of the composition. The composition of claim 1, wherein the methyl naphthalene is 40-50% by weight based on the total weight of the composition. The composition of claim 1, further comprising up to 10% by weight of an organic solvent. The composition of claim 4, wherein the organic solvent is an aromatic organic solvent. The composition according to any one of claims 1 to 5, wherein the composition is added to the vehicle fuel at 1-10% by volume.