Four stroke injection valve

Abstract

The invention relates to an injection valve for four-stroke engine. The injection valve is capable of stopping un-injected fuels from flowing reversely towards a first fuel chamber and a fuel supply flow path with reliability. When volume of an oil injection nozzle pressure chamber can be reduced, fuels can be stably injected to injection holes.

Description

technical field [0001] The invention relates to an injection valve for four-stroke fuel injection. Background technique [0002] Diesel engines are roughly divided into two-stroke engines and four-stroke engines. Two-stroke engines complete the cycle of suction, compression, combustion, and exhaust through two reciprocating cylinders. Four-stroke engines complete inhalation, compression, combustion, and exhaust through four reciprocating cylinders. exhaust cycle. The two-stroke engine has no valve drive system for intake and exhaust, the cylinder head is simple, the combustion chamber only has spark plugs, and the combustion efficiency is high, but the compression ratio cannot be increased like the four-stroke engine in structure, so the thermal efficiency and fuel consumption rate reduce. The four-stroke engine has an intake valve and an exhaust valve respectively, and the intake valve is opened during the intake stroke, and the exhaust valve is opened during the exhaust ...

AI Technical Summary

Problems solved by technology

The two-stroke engine has no valve drive system for intake and exhaust, the cylinder head is simple, the combustion chamber only has spark plugs, and the combustion efficiency is high, but the compression ratio cannot be increased like the four-stroke engine in structure, so the thermal efficiency and fuel consumption rate reduce

[0010] If the sacvolume is reduced, after the fuel injection is completed, the trickle flow is reduced, and the hydrocarbons are also reduced, but there is a problem that there is a large deviation between the spray characteristics and the injection holes.

Images