Intake/exhaust valve seat of ethanol gasoline engine
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A technology for ethanol gasoline, intake and exhaust, applied to engine components, machines/engines, mechanical equipment, etc., can solve problems such as obvious corrosion of metal copper, intake and exhaust valve seat materials cannot meet the needs of ethanol gasoline combustion, and achieve Good heat conduction effect
Active Publication Date: 2015-02-11
HANGZHOU BRANCH ZHEJIANG GEELY AUTOMOBILE RES INST +2
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[0003] However, the acetic acid produced after the combustion of ethanol gasoline is highly corrosive, especially to metals, especially copper.
The test shows that the performance of the intake and exhaust valve seat materials used when sharing the original gasoline fuel can no longer meet the needs of ethanol gasoline combustion, so the corrosion resistance and high temperature wear resistance of the intake and exhaust valve seats must be improved
Method used
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Embodiment 1
[0024] In embodiment 1, the chemical composition (percentage by weight) of the main working area 12 is: C1.0%, Ni1.6%, Mo7.5%, Cr4.0%, Co6.5%, Cu1.0%, other impurities ≤2%, the balance is Fe; the chemical composition (weight percentage) of the secondary working area 11 is: C1.1%, Cr1.5%, Cu2.0%, other impurities≤2%, and the balance is Fe.
Embodiment 2
[0025] In embodiment 2, the chemical composition (percentage by weight) of the main working area 12 is: C1.2%, Ni2.0%, Mo8.0%, Cr5.0%, Co8.0%, Cu0.5%, other impurities ≤2%, the balance is Fe; the chemical composition (weight percentage) of the secondary working area 11 is: C1.2%, Cr1.0%, Cu2.5%, other impurities≤2%, and the balance is Fe.
Embodiment 3
[0026] In embodiment 3, the chemical composition (percentage by weight) of the main working area 12 is: C1.4%, Ni1.8%, Mo7.0%, Cr7.0%, Co7.5%, Cu1.5%, other impurities ≤2%, the balance is Fe; the chemical composition (weight percentage) of the secondary working area 11 is: C0.9%, Cr2.0%, Cu1.5%, other impurities≤2%, and the balance is Fe.
[0027] In the above examples, the components with less than 2% other impurities are mainly the components contained in the raw materials (powder metallurgy materials). Common components include alloy components such as sulfur, silicon, vanadium, tungsten, and lead, which may be one of them. One or several types may also contain other ingredients. The composition and content of the specific ingredients are related to the iron ore mined. When manufacturing the intake and exhaust valve seat rings 10, the above ingredients can be controlled at a weight percentage of less than 2%.
[0028] The test results of the above-mentioned various embodime...
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Abstract
The invention discloses an intake / exhaust valve seat of an E25 ethanol gasoline engine. The intake / exhaust valve seat comprises a primary working area and a secondary working area, wherein the primary working area comprises the following chemical compositions in percentage by weight: 0.8-1.4% of C, 1.5-3.0% of Ni, 6.9-9.0% of Mo, 3.2-6.0% of Cr, 5.0-8.0% of Co, 0-1.5% of Cu, no more than 2% of other impurities, and the balance of Fe; and the secondary working area comprises the following compositions in percentage by weight: 0.9-1.4% of C, 0.5-2.0% of Cr, 0-3.0% of Cu, no more than 2% of other impurities, and the balance of Fe. According to the intake / exhaust valve seat disclosed by the invention, an intake valve seat is pressed in the intake duct of a cylinder cover, and an exhaust valve seat is pressed in the exhaust duct of the cylinder cover, so that the intake / exhaust valve seat can achieve the effects of heat transfer, sealing, valve cold / hot shock resistance, high temperature resistance, high pressure resistance and the like, and has favorable heat conduction performance, high-temperature oxidation resistance and the like.
Description
technical field [0001] The invention belongs to the technical field of automobiles and relates to an intake and exhaust valve seat ring of an ethanol gasoline engine. Background technique [0002] Ethanol automobile engine fuel is energy-saving and environmentally friendly, and is an excellent renewable resource. Since the 1990s, it has become the object of vigorous research and development in many countries. At present, the energy crisis is intensifying. The United States and South American countries are vigorously promoting ethanol fuel. According to statistics, ethanol gasoline vehicles have occupied 20%-25% of the automobile market share. As a new type of clean fuel, ethanol gasoline is currently the world's The development focus of renewable energy is in line with my country's energy substitution strategy and the development direction of renewable energy. It is technically mature, safe and reliable, fully applicable in our country, and has good economic and social benefi...
Claims
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Patent Type & Authority Patents(China)
IPC IPC(8): F01L3/02C22C38/52C22C38/20
Inventor 钟建勤吴汉涛马文亮李慧军由毅赵福全
Owner HANGZHOU BRANCH ZHEJIANG GEELY AUTOMOBILE RES INST
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