INTERNAL COMBUSTION ENGINE WITH IMPROVED EXHAUST VALVE INTERNAL COMBUSTION ENGINE ARRANGEMENT

摘要

Exhaust gases, which are slightly cooler than normal due to NOx suppressing ignition of the charge containing a large amount of recirculated gas by dual spark plugs, are exhausted via a large diameter exhaust valve to reduce the time for which they exceed the speed of sound and transfer heat to the cylinder head to maintain a high CO and HC oxidizing temperature. The exhaust valve is diametrically opposed to the inlet valve and has a cross sectional area of 19 to 24% of the cylinder bore.