IC engine with fuel injection - has piston with recess for inlet valve and fuel spray

摘要

The engine works on the four stroke principle with indirect fuel injection, and fuel is prevented from spreading on to the cylinder walls. The inlet valve (15) is fitted in the cylinder head immediately above the piston crown. The piston crown has a recess (18) into which the inlet valve can extend, when the piston approaches TDC. The spark plug electrodes also extend into the recess. The fuel injector nozzle (19) is located in the air inlet channel (13) behind the inlet valve. injection commences immediately the inlet valve opens. Fuel is prayed into the piston recess and ignited by HV spark. Ignition timing is 18 degrees advanced.