Ignition system and vehicle for methanol engine

Abstract

The invention provides an ignition system and a vehicle for a methanol engine and relates to the field of methanol engines. The ignition system includes a main combustion chamber and a pre-combustionchamber, wherein an intake valve is arranged in the main combustion chamber, and the intake valve communicates with a main injector for injecting a lean mixture having a first predetermined concentration into the main combustion chamber; the pre-combustion chamber communicates with the main combustion chamber through a pre-combustion chamber nozzle, and a spark plug electrode and a pre-injection nozzle are arranged in the pre-combustion chamber; and the spark plug is arranged in a methanol pre-combustion chamber. Due to the high concentration of the rich mixture gas, the requirement for minimum ignition energy of the spark plug is reduced. By igniting the concentrated methanol mixture gas in the pre-combustion chamber, the concentrated mixed methanol flame is injected into the main combustion chamber, the lean mixture gas of methanol in the main combustion chamber is combusted, and the ignition energy is greatly increased. By using of the system, the combustion temperatures and enginethermal loads are reduced while engine NOX emission is reduced and engine thermal efficiency is improved.

Description

technical field [0001] The invention relates to the field of methanol engines, in particular to an ignition system and a vehicle for methanol engines. Background technique [0002] With the diversification of engine fuels, the use of clean energy methanol has gradually become a new trend. Most clean energy engines use ignition combustion. The important feature of ignition is the spark plug, which ignites the mixture directly in the combustion chamber. [0003] The ignition energy of the spark plug directly affects the combustion process of the methanol engine, and has an important impact on the engine's power, economy, emissions and combustion noise. [0004] The commercial vehicle clean energy engines currently on the market are basically developed on the platform of diesel engines, using two or four valves, and the spark plugs are basically installed in the position of the original fuel injector. Contents of the invention [0005] An object of the present invention is t...

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Problems solved by technology

[0005] An object of the present invention is to provide an ignition system and vehicle for methanol engines to solve the problems of poor economy, low thermal efficiency and high requirements for post-emission treatment of methanol engines in the prior art

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