Increasing Pressure: To Improve Performance & Fuel Economy

Welcome to All Sensors “Put the Pressure on Us” blog. This blog brings out pressure sensor aspects in a variety of applications inspired by headlines, consumer and industry requirements, market research, government activities, and you.

Increasing Pressure: To Improve Performance & Fuel Economy

With existing Corporate Average Fuel Economy (CAFE) regulations that include a fleet-wide average fuel economy requirement of 54.5 MPG by 2025, many people conclude that electric and hybrid electric vehicle will have to be a significant part of each car maker’s fleet. However, advanced gasoline and diesel engines may be able to make these standards all by themselves.

One example is the Achates Power Opposed-Piston Engine. It has already demonstrated fuel economy gains of 30-50% as well as significant emissions reductions, more cost effectively than other solutions. Achates engine programs are in development at 12 leading engine manufacturers.

The Achates engine’s proprietary combustion system has two identical opposed pistons with injectors located at the end of the long axis and consumes gasoline rather than diesel fuel. The engine uses a 2000 bar injection pressure-capable common-rail fuel  injection  system and has been tested at pressures well above 1000 bar.

Achates Power Opposed-Piston Engine

The Achates opposed-piston, gasoline compression ignition (OPGCI) engine.
Source: Achates Power.

While indirect injection systems in internal combustion (gasoline) engines typically operate in the 40 to 60 psi range, conventional direct rail fuel injection systems on diesel engines already operate at pressures in excess of 100 MPa (15,000 psi). One injection systems supplier, has had a 2,500-bar common-rail system in production since 2014. The higher injection pressure atomizes the fuel more finely, improving combustion to deliver improved fuel economy and increased performance.

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