High compression, typical of diesel engines, is no longer needed to make the fuel ignite; in fact, the chemistry causing this auto ignition process exists only at lower compression ratios.

Diesel engines are renowned for their power and fuel efficiency, but cold weather can pose significant challenges to their operation. Many diesel owners wonder if starting their engines in cold ...

SAE Transactions, Vol. 116, Section 3: JOURNAL OF ENGINES (2007), pp. 1398-1408 (11 pages) The effects of variable compression ratio (CR) and fuel composition on thermal efficiency were investigated ...