Fuel agnostic compression ignition engine

Some embodiments described herein relate to a method of operating a compression ignition engine. A method of operating a compression ignition engine includes opening an intake valve to draw a volume of air into a combustion chamber, closing the intake valve, and moving a piston in the combustion chamber from a bottom dead center (BDC) position to a top dead center (TDC) position at a compression ratio of at least about 15: 1. The method also includes injecting a volume of fuel into the combustion chamber during a first period of time at an engine crank angle between about 330 degrees and about 365 degrees. The fuel has a cetane number of less than about 40. The method further includes combusting substantially all of the volume of fuel. In some embodiments, the delay between injecting the volume of fuel into the combustion chamber and starting combustion is less than about 2 ms. 本文所述的一些实施例涉及一种操作压燃式发动机的方法。操作压燃式发动机的方法包括打开进气门以将一定体积的空气吸入燃烧室，关闭进气门，以及以至少约15:1的压缩比在燃烧室中使活塞从下止点(BDC)位置移动到上止点(TDC)位置。该方法还包括在第一时间段期间以介于约330