Enjin 4 lejang

Enjin 4 lejang (Four stroke engines)

Hari ini, jenis enjin pembakaran dalaman yang paling lazim digunakan pada kenderaan seperti kereta, bas, lori dan motosikal adalah enjin empat lejang, sama ada enjin petrol ataupun enjin Diesel. Satu lejang merujuk kepada gerakan omboh dari titik tetap atas ke titik tetap bawah atau sebaliknya; maka enjin empat lejang mendapat namanya daripada empat lejang yang masing-masing menjalankan satu fungsi khas iaitu masukan, mampatan, perolehan kuasa dan penyingkiran gas ekzos. 

Four-stroke engines are the most common internal combustion engine design for motorized land transport,[1] being used in automobiles, trucks, diesel trains, light aircraft and motorcycles. The major alternative design is the two-stroke cycle.[1] The exhaust emissions from four stroke engines, like other combustion engines, contain significant quantities of greenhouse gases, as well as other forms of air pollution. The use of four stroke engines in cars and other transport applications is scheduled to be phased out in some jurisdictions, and as of 2022 other major jurisdictions are considering similar proposals

Reference: Wikipedia

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