Page 48 - TBN-2013-1

Below are some comparisons using the OEM filters and Microclean diesel filters:
降低猜测和可能为引擎带来的潜在损坏。
空气过滤器服务
大部分的空气过滤器是以水 基原材料制成的。因此，它 们无法承受水或湿气和高气 压。服务中心技术人员最常 犯的错误是认为他们能够打 掉灰尘，然后用空气吹走灰 尘和粘在过滤器上的污垢。 许多空气压缩器都没有安装 上干燥器和水分离器，因此 这些空气压缩器里的水分造 成空气过滤器的元件潮湿。 把事情弄得更糟的是，这些 空气压缩机里的气压介于8 巴(116psi)至10巴(145 psi)之间。如此高的气压 和水分所组成的力量，足以 损坏或导致空气过滤器穿 孔，而且会使它只能防止一 点或完全无法防止空气里的 灰尘进入燃烧室。在为空
气过滤器提供服务时，不要在任何硬物或表层 上敲打它来打掉灰尘，因为这将损坏空气过滤 器的密封。将空气压力调整至介于2.2 巴或32 psi之间，并确定空气是干燥的。更重要的部 分是安装一个空气过滤器指示器，以便您可以 确切地知道空气过滤器的情况。这可降低把状 态良好的空气过滤器做不必要的更换。状态良 好的空气过滤器可提供优化的空气量，带来最 最大的燃烧。
4 引擎活塞比较
引擎内部的磨耗，与引擎油污染的程度息息 相关。许多人都被误导并相信每行驶5，000 公里就必须更换引擎油。如今，有了级别较 好的引擎油，他们就能够将它延长到10，000 公里。但是，很少人真正知道引擎油需要更 换不是因为它已经达到5，000至10，0000公 里。比如:
a. A先生每天开车到空气污染指数介于#50 至#65之间的吉隆坡。
b. B先生每天开着他的卡车经过灰尘到处飞扬 的采石场，空气污染指数介于#80至#100之 间。
c. C先生每天在新西兰的基督城里开车，空气 污染指数约#20。
在以上的3种情况下引擎油的污染程度因为空 气环境的关系而明显不同。A先生在不超过5 ，000公里时，就应该更换引擎油，B先生需要 在2，0000公里时更换引擎油，而C先生则需要 在超过20，000公里时才更换引擎油。不是以 您的车子行驶多久，而是引擎油的污染情况来 决定更换的周期。因此，关于引擎油最重要的 一点不是多好，而是多干净。
在空气污染指数为#50时，引擎油中的颗粒将 从约每公升1，000，000颗粒(#5至15微米) 增加至每公升10，000，000 颗粒(#5支#15微 米)。当它在每公升达到10，000，000颗粒
Particulars
Common Market
Microclean Diesel Filter
High Micron Rating Filter
Low Micron Rating Filter
i) Filter micron rating
35 to 50 microns
1 to 5 microns
ii) Cost per unit
Cheaper
More Expensive
iii) Replacement*
<> 10,000 KM*
<> 20,000 KM*
iv) Wear & Tear to Injector
6 month to 12 months
5 years to 10 years
v) Black smoke emission
High
Very low
vi) Fuel consumption
Gradually increasing
Remains or lower
vii) Water retention
<> 100 mL
<> 500 mL
viii) Engine horsepower
As vehicle specifications
Increase
* Based on standard diesel fuel from Petrol Stations.
3 Air filters
Air filter are another important factor when it comes to fuel savings. For die- sel engines, every litre of diesel requires 25 cubic metres of air to maximise fuel combustion efficiency. If the air entry ratio is insufficient, then the com- bustion will be incomplete. Most of the vehicle operators are also playing a guessing game when it comes to determining whether the filter is functioning effectively or has been choked. Few if any, would be willing to install devices to keep check with the air filter. The most accurate way to know whether an air filter is choked or still in good condition is to use an air filter suction indi- cator. This would minimise any guessing game and potentially cause more damage to the engine.
Servicing an air filter
Most air filters are made of paper based material. As such, they cannot with- stand water or moisture and high air pressure. One common mistake made among service centre mechanics was firstly, they would knock off the dust from the filter and then use the air to blow off the dust and dirt sticking in the filter. Many of the air compressors are not installed with water dryers or separators and therefore, the water inside these air compressors causes the air filter elements to become wet. To make the matter worse, the air pressure from these air compressors is between 8 bars (116 psi) to 10 bars (145 psi). With such a high pressure and water, the force is strong enough to damage (puncture) the air filter. And there is practically little or no protection against air dust entering the combustion chambers. When servicing an air filter, do not knock off the dust by hitting against any hard objects or surface as this will damage the sealing of the air filter. It is also important to adjust the air pressure to within 2.2 bars or 32 psi and make sure that the air is dry. But the most important part is to install an air filter indicator so that you can know exactly the condition of the air filter. This will minimise a lot of unnecessary replacements of air filters when they are still in good condition. And a good condition air filter allows the optimum amount of air required for maximum combustion of the fuel.
4 Engine piston compressions
The wear and tear of the engine internal parts depends very much on the contamination level of the engine oil. Many people have been misled into believing that engines oil must be changed at every 5,000km and now with better grade engine oil, they can be prolonged to 10,000km. But few people
46 truck & bus news › 2013/1