The engine consumes less fuel in the future

Engineers are working to transform a new generation of engines that can help reduce fuel consumption and emissions from greenhouse and automotive effects.

Scientist - mechanical engineer Gregory Shaver at Purdue University said they are making a huge step forward in engine technology that can help new cars as well as other fuel-efficient vehicles and more environmentally friendly.

Engine 101

Traditional engines act as a unit where the piston pushes the crank to make the valves open, leading air and fuel into the cylinder as well as being discharged. And the new method called 'Variable valve start' will help separate the piston movement from the valve movement and escape, meaning that the engineers will have to regulate the gas and fuel levels. Load into the engine and power most accurately.

According to Shaver, this allows us to build both cleaner and more efficient petrol and diesel engines and thus have more direct control on the valve. For example, they can re-conduct the gas back into the cylinder, a process that reduces the temperature in the engine, which leads to a significant reduction in emissions such as NO or a prefix of smoke.

Shaver and his colleagues created a method of storing computers to detect every 1 cycle of combustion during the operation of the engine. Research results will open the door to environmentally friendly techniques while existing combustion engines cannot

Gregory Shaver (left) and graduate student David Snyder are discussing the flaming technique of automotive engines

With this new model, they can create a little change in adjusting both the valve opening and the last one to make the most of the mode of operation on alternative fuels.

According to Shaver the main problem now is that we have all kinds of cars with 'flexible fuel' , which means that fuel tanks won't corrode or chemically compatible with alternative fuels like ethanol. . Alternative fuels do not burn like traditional fuels, so we can use ethanol for engines but it will not burn efficiently.

Green engine

The segregated system also makes it possible to get closer to perfect the new generation of green engines based on a uniform compression ignition system (HCCI). The basis of the HCCI engine is that both the intake and exhaust valves are open in the same way so that the exhaust gas is directed back into the engine. However, there is a problem of lack of control on the valves and will cause disaster if too much fuel discharges air.

Mr. Shaver said they need to tighten control on the amount of fuel and air coming in through the intake valve with the hot exhaust gas escaping through the exhaust valve. The re-absorption of exhaust helps the engine cool. Even a slight drop significantly reduces NO-prefix smoke emissions.

HCCI engines are also used to compress at lower temperatures than traditional ignition engines.

Sensors inside the engine will help control the operation as well as alter the adjustment of valves to achieve the highest ignition efficiency. The team will use feedback control systems with sensors that provide data from engines and algorithms to precisely control valves.

Currently, the research team is building a multi-cylinder engine based on a completely flexible variable valve start system.

Anh Phuong