Dual-fuel engine combustion organization method using high-pressure natural gas injection valve
A dual-fuel engine, natural gas technology, applied in combustion engines, internal combustion piston engines, engine control and other directions, can solve problems such as poor power performance, economical emissions, etc.
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Embodiment 1
[0022] A dual-fuel engine combustion organization method using high-pressure natural gas injection valves, with four operating modes:
[0023] Mode 1. When the dual-fuel engine starts, the idle speed and the load are lower than 15%, the engine is in the fuel oil operation mode, the high-pressure natural gas injection valve and the auxiliary injector do not work, from the closing of the intake valve to the piston traveling 10- 30°CA, only use the main fuel injector to inject a single injection into the cylinder, because natural gas is prone to misfire due to lean combustion at low load;
[0024] Mode 2. When the dual-fuel engine is at 15-50% low-medium load, the engine is running in gas mode. From the closing of the intake valve to 30°CA before the piston travels to the top dead center, the high-pressure natural gas injection valve performs two non-stop injections to the combustion chamber. Equal amount of natural gas injection, at the same time when the piston travels to 15-25...
Embodiment example 2
[0031] The invention belongs to the field of internal combustion engine combustion methods, and in particular relates to a dual-fuel engine combustion organization method and a combustion system composition using main and auxiliary injectors and high-pressure multiple injections in a natural gas cylinder.
[0032] Compared with other types of engines, dual-fuel engines have obvious advantages in terms of economy of use, thermal efficiency, combustion noise, NOx and PM emissions, etc.; Knocking is prone to occur under load, the increase of natural gas substitution rate is limited, and there are problems such as high HC and CO emissions.
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