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APTE6510 Engine Fuel And Emissions

tag 0 Download 15 Pages / 3,650 Words tag 07-07-2021


Non-selective catalytic reduction is mainly used as a three-way catalyst in the automotive industry. This system does not require additional reagents to be injected because the unburnt hydrocarbons are used as a reductant. Though gases must not possess more than 0.5% oxygen. This is why NSCR can only be used with rich combustion mixes. The catalysts used are normally based on platinum. It can only be used for choked mix engines and not for self-combustors like diesel engines.

Multi-point Sequential Gas Injection System

-For vehicles built after 1999 and earlier which had a plastic inlet manifold, this type of kit provides more precise fuelling than an induction.

- Gas Injection System is structured for engines with carburettors or throttle body or mechanical injectors. The system injects LPG as a vapour for each cylinder, very close to the inlet valves. This eliminates any power loss caused by mixer venturi constriction and also eliminates the possibility of spit back. The gas ECU does not require any petrol injector pulses, but calculates gas injector timings from manifold absolute pressure (MAP), RPM and a tuning map.

- This type of system is designed for petrol-injected engines with catalytic. Converter/lambda probe, (given that they have a metal inlet manifold and were manufactured before 1999).

- Direct injection petrol engines are not suitable candidates for single-point induction systems.

Effects on Humans: - Restricts breathing, sore throats.

Effects on Environment: - Smog and also contribute to the formation of acid rain, ozone.

Reduces the flow of oxygen in the blood stream, particularly dangerous to person with heart disease, leading to sudden death.

Effects on Environment: - Harms plant life if high levels of CO exposure for an extended period of time, Contributes to the formation of smog.

Emissions Results From Port Injection Bi- Fuel (Gasoline And Compressed Natural Gas) Demonstrator Vehicles.

Conversion of a diesel engine is different from that of a petrol engine. Diesel always burned - you just have the option of adding LPG or not. Adding LPG helps the diesel to burn more completely. This tends to clean up emissions and increases the power output - allowing the use of a lighter throttle and leading to fuel economy.

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