Japanese automotive giant Nissan announced that they reached a groundbreaking point in engine efficiency. According to the statement made by the company, the new generation still in the development phase 50 percent thermal efficiency was achieved in the e-Power system announced.
A typical internal combustion engine around 40 percent have thermal efficiency. In other words, only 40 percent of the energy generated when fuel is burned can be converted into motion energy. The remainder turns into waste such as CO2 emissions. Nissan has reduced emissions, thanks to 50 percent thermal efficiency, which seems impossible but that they can reduce fuel consumption by 25 percent underlines.
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Here, the difference of Nissan’s e-Power system from conventional engines stands out. Conventional combustion engine vehicles demand power and performance from the engine under a wide range of speeds and loads. This prevents the engine from working at optimum efficiency at all times. The internal combustion engine in e-Power, on the other hand, acts as a generator to fill the battery that feeds the electric motors, rather than directly powering the vehicle. This ensures that the engine always works in its most efficient range.
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Another point is that Nissan developed to reach the target of 50 percent thermal efficiency.STARC‘concept. The concept enhances the in-cylinder gas flow – the flow of the air-fuel mixture drawn into the cylinder – and ignition, reliably burning a more diluted air-fuel mixture at a high compression ratio, thereby improving thermal efficiency. In conventional internal combustion engines, there are some restrictions in controlling the dilution level of the air-fuel mixture in order to respond to different driving conditions.
“It took 50 years to increase thermal efficiency from 30 to 40 percent in internal combustion engines. But with e-Power, we can increase it to 50 percent in just a few years,” said Toshihiro Hirai, senior vice president of Nissan electric vehicles engineering unit, who commented on the subject. He spoke in the form. The new generation e-Power system is currently in development and when it will be ready has not been announced yet.