Understanding Lean-Burn Engines

Mahindra Bolero Parts

The automotive car part experts of one of the Leading Mahindra Bolero Parts Suppliers explains that there is nothing better than developing a technology that plays a major role in curbing nitrogen oxide exhaust emissions flow in the atmosphere and this is what lean-burn engines are doing for the past for many years. They are decreasing the unsustainable effects of driving a car which our environment has to bear on the everyday basis. Lean-burn engine is a superb creation on a part of the automobile engineers that produce a lean or less concentrated mixture of fuel and air in order to not only reduce exhaust emissions but also curb fuel consumption.

Understanding Lean-burn engines in detail

I think the name “lean-burn” pretty much sums up what we want to say, but as we say, “The more, the better”. The Lean-burn engines are engineered in a way that they only enable a very lean amount of fuel to be burned in an engine’s combustion chamber. 14.7:1 is considered an appropriate ratio of fuel and air, where the fuel burns the best in the internal combustion chamber. A lean-burn engine is effective in taking this ratio to 32:1. Just wonder!

It is to be believed that if the internal combustion engines we have in our cars are 100% effective, they would burn the fuel efficiently and would only produce carbon dioxide (CO2) and water (H2O). But unfortunately, the internal combustion engines as they should be are not as effective, which in turn produces not only CO2 and H2O but also other harmful emissions such as carbon monoxide (CO), oxides of nitrogen (NOx) and unburned hydrocarbons.

Apart from Catalytic Converters that filters exhaust gases coming from the engine, a Lean-burn engine is another way of reducing the level of harmful emissions by burning the fuel inside the combustion chamber more efficiently and improved combustion control.

In lean-burn engines, specially designed pistons are placed along with the intake manifold so that they can match the actual pistons. Also, the shape of the piston crown generates a heavy turbulence in the incoming air/fuel mixture that enables complete combustion.

The only drawback of lean-burn engines is that they increase the level of exhaust NOx emissions due to the increase in combustion temperature and higher levels of heat and shallower RPM power-band because of the slow burning of the lean mixtures. To curb this problem, the lean-burn engines have been devised with lean-metered direct fuel injection to further reduce NOx emissions.

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