Homogeneous Charge Compression Ignition Helps To Reduce Emissions from Fuel and Air

 

High capacity charge compression ignition is a new technology for fuel combustion used on a smaller scale now, but will soon be in wide use and be replacing gas and diesel completely. The HCCI system uses a single fuel cell with a number of stainless steel injectors for each chamber of the engine. The HCCI injector produces a constant supply of mixed fuel as the gas passes through the injectors. When the ignited fuel comes in contact with the spark plug, it creates a spark which ignites the compressed mixture.

In homogeneous charge compression ignition, well-mixed fuel and oxidizer (typically air) are compressed to the point of auto-ignition. Injector burners (in most applications stainless steel) are connected to the injector chambers by a long hose and oxygen tanks are included to supply oxygen to the combustion chamber. When the temperature of the injected gas and the oxygen get near the ignition temperature, the Si engine starts and runs continuously because it has no internal combustion chamber. Once the temperature becomes steady, the Si engine shuts off and the fuel mixture is compressed again in a non-combustion chamber.

Homogeneous charge compression ignition helps to reduce emissions from the fuel and air. HCCI engines can operate at diesel-like compression ratios. The main idea behind HCCI is that the mixing of gasoline and diesel fuel produces a higher temperature and higher amounts of vapor and gases than would be obtained by using traditional spark ignition processes. A major benefit of HCCI is that the engine does not need any ignition source at the very beginning of the fueling process to start the engine. HCCI also greatly reduces the wear and tear on the existing engines by eliminating the ignition spark plugs, combustion chambers, and air guide pumps. Such advantages have led to increasing adoption of HCCI. For instance, in Japan, Mazda offers homogeneous charge compression ignition in Mazda 3 cars.