Chevron Delo 400 LE Synthetic SAE 5W-40 is a 100% synthetic engine---->跟據原廠資料,這一瓶是全合成機油,提供給樓上大大參考 oil which exceeds industry and engine manufacturers’ performance requirements.
Why was the new API CJ-4 oil performance category developed? The new API CJ-4 performance category was developed to address both the unique needs of new engines and to protect older engines while enhancing the life of emission control systems as required for regulatory compliance. In order to meet new emission standards for new heavy-duty engines starting January 2007, engines will be equipped with advanced emission control technologies, including diesel particulate filters (DPF) and in most cases exhaust gas recirculation (EGR). API CJ-4 was designed to ensure that the DPF cleaning did not occur before the 150,000 mile mark mandated by the EPA, and to improve oxidation to combat the increased EGR rates over the 2002 engines. 跟據上文 API CJ-4 的規範 就是因應2007年起,北美地區柴油引擎車輛新車及舊式車輛,因應美國環保局 (EPA) U.S. Environmental Protection Agency 制定的環保法規要求, 車輛全面加裝排氣控制系統,其系統元件包含diesel particulate filters (DPF) 及exhaust gas recirculation (EGR).所設立的柴油車用機油認證. 通過 API CJ-4認證的機油,API CJ-4 規範硫酸鹽灰(Sulphated Ash) ,磷(Phosphorus) , 硫(Sulphur) 在機油中的含量,以確保24萬公里 (150,000 mile)內都不用清理DPF裝置
Ash, phosphorus, and sulphur, which are commonly found in the exhaust of internal combustion engines, can cause damage to aftertreatment devices. The following explains how each of these substances can affect exhaust aftertreatment devices.
How ash affects exhaust aftertreatment devices? Ash in the exhaust can:
Block filters (DPF, CRT) - Ash from the lubricant can potentially block the pores of the diesel particulate filter, leading to an increase in back pressure. This can have a detrimental impact on fuel consumption and power. Furthermore, reactions with the ash in the filter and high temperatures can lead to permanent filter substrate cracking. The general use of lubricants that create ash increases the cost of manufacturing DPFs and CRT because these devices require larger filters to compensate for ash blockage.
How phosphorus affects exhaust aftertreatment devices Phosphorus in the exhaust can:
Deactivate catalysts (three-way catalytic converters, Lean NOx trap, DeNOx catalyst, DOC, CRT, SCR, and cDPF) - Phosphorus can reduce the efficiency of catalysts in exhaust aftertreatment systems. Catalysts used in these exhaust aftertreatment devices include noble metals such as platinum, rhodium, or palladium. Phosphorus can deactivate these devices by forming deposits that block the active noble metal sites, causing irreversible damage that accumulates over time. When a catalyst is "poisoned" by phosphorus, it is no longer able to convert harmful emissions with the same efficiency for which it was designed.
How sulphur affects exhaust aftertreatment devices Sulphur in the exhaust can: • Block NOx storage sites (NOx traps) - The catalyst in a lean NOx trap will absorb sulphur oxides (SOx) preferentially to NOx. If absorbed, the SOx block the catalyst sites and reduces the efficiency of the NOx conversion to nitrogen gas. • Increase sulphate particles (DOC, CRT, SCR, cDPF) - The oxidation catalysts used in DOC, CRT, SCR, and cDPF can increase the conversion of sulphur oxides to sulphates, which increases particulate emissions. • Desensitize the catalyst (Lean NOx traps, SCR) - When sulphur oxides block lean NOx traps they must be removed. However, the high temperatures required to remove them can desensitise the catalyst. SCR catalysts can also be fouled by sulphates if they form ammonium sulphate at very low exhaust temperatures
有些DPFs另外再搭配Diesel Oxidation Catalysts (DOCs) http://www.lubrizol.com/CJ-4Course/free/Per_Support/ps1.htm?PsSupport-04 Diesel Oxidation Catalysts (DOCs) DOC devices are used to remove organic particulates (which come from unburned fuel and oil), hydrocarbons, and carbon monoxide from diesel exhaust. DOCs use catalysts like platinum or palladium to promote the oxidation of organic particulates, hydrocarbons, and carbon monoxide (CO), thereby converting them to carbon dioxide (CO2) and water.
SCRT系統機油要求 Engine Oil Low ash oils are recommended to maintain the filter service interval and optimal SCRT® performance.
■Use only engine oil with a sulphur content of less than 7,000 ppm. ■Ensure engine oil consumption is within engine manufacturers limits, typically less than 1 litre per 1,000km. During normal operation, ash, which is an incombustible material (mainly the residues of burnt engine oil), can gradually build up in the filter. This is removed by regular servicing.
Chevron Holdings Inc Taiwan Branch Room D, 5th Fl., 245 Tun-Hwa South Road(敦化南路), Sec. 1 Taipei 106, Taiwan
Tel: (886 2) 2777-2250 Fax: (886 2) 2777-1929
Chevron 在台灣1949年開始是以 CALTEX (嘉德市)的品牌名稱賣潤滑油並提供桃園國際機場及高雄國際機場的飛機燃料的供應商之一 Chevron has made its presence in Taiwan since 1949 being mainly engaged in the sales of Caltex Brand lubricant products and marine lubricants. Besides this, Chevron is also a major supplier for jet refueling services at CKS and Kaohsiung Int'l Airport
使用高含硫量高的汽油或柴油,當這些汽油或柴油燃燒後,汽油或柴油中的硫化物與空氣中的水氣結合後,會腐蝕汽門裝置及汽缸壁,造成引擎用久損壞,所以適時的更換機油及選用適當的機油,可以減輕此引擎的腐蝕現象發生,延長引擎使用壽命 High sulfur levels in fuel, when combined with water vapor, can also cause corrosive wear on valve guides and cylinder liners, which can lead to premature engine failure. The use of proper lubricants and correct oil drain intervals helps combat this effect and reduces the degree of corrosive damage
使用含硫量高的汽油,也會損壞含氧感知器使用效能及壽命 There is evidence that in some instances, sulfur in gasoline may degrade the performance of oxygen sensors, which may also result in high emissions. High sulfur levels in gasoline may also impair the performance of OBD II systems on some vehicles.