12-09-2017, 12:41 PM
Laser ignition is an alternative method to ignite mixtures of fuel and oxidant. The phase of the mixture may be gaseous or liquid. The method is based on laser ignition devices that produce short but powerful flashes regardless of the pressure in the combustion chamber. Generally, high voltage spark plugs are good enough for car use, since the typical compression ratio of an otto cycle internal combustion engine is about 10: 1 and in some rare cases reach 14 : 1. However, fuels such as natural gas or methanol can withstand high compression without self-ignition. This allows for higher compression ratios because it is economically reasonable, since the fuel efficiency of such engines is high. The use of high compression ratio and high pressure requires special spark plugs that are expensive and their electrodes still wear out. Therefore, even expensive laser ignition systems could be economical because they would last longer.
It is widely accepted that internal combustion engines will continue to fuel our vehicles. Therefore, as the global mobilisation of people and goods increases, advances in combustion and post-treatment are needed to reduce the environmental impact of continued use of IC motor vehicles. To meet the requirements of environmental legislation, car manufacturers continue to address two critical aspects of engine performance, fuel economy and exhaust emissions. New engines are becoming increasingly complex, with advanced combustion mechanisms that burn a growing variety of fuels to meet future performance, fuel economy and emissions targets. The ignition spark plug has remained largely unchanged since its invention, but its poor ability to ignite highly diluted air-fuel blends limits the potential for improved combustion efficiency.
It is widely accepted that internal combustion engines will continue to fuel our vehicles. Therefore, as the global mobilisation of people and goods increases, advances in combustion and post-treatment are needed to reduce the environmental impact of continued use of IC motor vehicles. To meet the requirements of environmental legislation, car manufacturers continue to address two critical aspects of engine performance, fuel economy and exhaust emissions. New engines are becoming increasingly complex, with advanced combustion mechanisms that burn a growing variety of fuels to meet future performance, fuel economy and emissions targets. The ignition spark plug has remained largely unchanged since its invention, but its poor ability to ignite highly diluted air-fuel blends limits the potential for improved combustion efficiency.