A method for energy-saving of high-low partition stratified lean-burn engine

Abstract

The invention discloses an energy saving method for a high and low regionalized and layered lean-burning engine. The method at least includes the following steps that firstly, an air cylinder is divided into at least two combustion regions which are the large combustion region and the small region different in size, and the large combustion region and the small combustion region are arranged in a stepped shape to achieve the air cylinder top regionalized combustion purpose; secondly, an air cylinder cover corresponding the air cylinder of each combustion chamber is connected with a spark plug, an exhaust pipe and an air inflow pipe, an air cylinder pipe separation board is arranged in each air inflow pipe so as to divide the air inflow pipe, especially the section close to the air cylinder into a large air inflow channel and a small air inflow channel, and therefore layered combustion can be achieved by the engine conveniently; and thirdly, the engine is connected. By the adoption of the method, the combustion efficiency of fuel oil in the engine is improved when an automobile is at the idling speed and bears the small load, exhaust gas emitted by the engine and oil consumption of the engine are reduced, the environment-friendly performance of the automobile in the travel process is improved, and the use cost of the automobile cost is reduced.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to an energy-saving method for a high-low partition stratified lean combustion engine. Background technique [0002] At present, automobile engines are mostly reciprocating piston engines, which are the most widely used engines in automobiles, but they have the following disadvantages: (1) The throttle valve is completely closed at idle speed, and only a small amount of air enters through the idle passage of the throttle valve The cylinder will form a large vacuum when inhaling, which will inevitably increase the energy consumed by the intake air and increase the pump air loss; at the same time, because the vacuum of the intake pipe is very large at this time, when the intake valve is opened, the cylinder The pressure in the exhaust gas is higher than the pressure of the intake pipe, and the exhaust gas expands into the intake pipe. During the intake stroke, the exhaust gas and the ...

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Problems solved by technology

[0002] At present, automobile engines are mostly reciprocating piston engines, which are the most widely used engines in automobiles, but they have the following disadvantages: (1) The throttle valve is completely closed at idle speed, and only a small amount of air enters through the idle passage of the throttle valve The cylinder will form a large vacuum when inhaling, which will inevitably increase the energy consumed by the intake air and increase the pump air loss; at the same time, because the vacuum of the intake pipe is very large at this time, when the intake valve is opened, the cylinder The pressure in the exhaust gas is higher than the pressure of the intake pipe, and the exhaust gas expands into the intake pipe. During the intake stroke, the exhaust gas and the new mixture are sucked into the cylinder at the same time. In order to ensure the normal combustion of the mixture diluted by the exhaust gas, more If there is too much fuel, the mixture will be enriched, which will inevitably increase fuel consumption; (2) When the load is small, the opening of the throttle valve is very small, so that a large vacuum is formed when the intake valve is opened. The pressure inside is higher than the pressure of the intake pipe. During the intake stroke, part of the exhaust gas expands and enters the intake pipe. In order to ensure the normal combustion of the mixture diluted by the exhaust gas, more fuel must be supplied, increasing the Fuel consumption; (3) The mixed gas of conventional gasoline engines is homogeneous, and generally can only work within the range of air-fuel ratio 12 to 17. In order to prevent deflagration, a lower compression ratio is used, resulting in lower thermal efficiency; (4) The intake pipe is used The throttling method adjusts the amount of the mixed gas charge, which makes the pumping loss larger, and burns near the stoichiometric ratio, resulting in higher NOx emissions

[0004] However, the above-mentioned problems 1-4 cannot be fully resolved, and the exhaust gas combustion of the engine is still insufficient

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