Combustion Chamber Types

Combustion Chamber Types Points : combustion chamber types, the problems related to combustion chambers, problems in internal combustion engines, ic, engine, auto diesel Beside the three shapes just covered, there are other combustion chamber classifications. Each type is designed to increase combustion efficiency, gas mileage, and power while reducing exhaust pollution.

A swirl combustion chamber causes the air fuel mixture to swirl or spin as it enters from the intake port. This causes the air and fuel to mix into a finer mist that burns better.

A four-valve combustion chamber uses two exhaust valves arid two intake valves per cylinder. The extra valve increase flow in and out of the combustion chamber. This set up is used in a few exotic high performance engines.

A three-valve chamber uses a small combustion chamber flame to ignite and burn the fuel in the main large combustion chamber. A very lean mixture (high ratio of air to fuel) is admitted into the small chamber by an extra valve. When the mixture in the small chamber is ignited, flames blow into and ignite the fuel in the main chamber.

A stratified charge chamber allows the engine to operate on a lean, high efficiency air-fuel ratio. Fuel economy is increased and exhaust emission output is reduced.

An air jet combustion chamber has a single combustion chamber fitted with an extra air valve a passage runs form the carburetor to the combustion chamber and jet valve.

During the intake stroke, the engine camshaft opens both the conventional intake valve and the air jet valve. This allows the fuel mixture to flow into the cylinder past the conventional intake valve. At the same time, a stream of airflow enters into the cylinder through the jet valve.

The jet valve action causes the fuel mixture in the cylinder to swirl and mix. This increases combustion efficiency by causing more of the fuel to burn during the power stroke the jet valve only works at idle and low engine speeds. At higher rpm normal air fuel mixing is adequate for efficient combustion.