What is an Atkinson cycle engine?

Who makes Atkinson engines?

The Atkinson cycle, created in 1882 by British engineer James Atkinson (1846–1914), was more efficient than the Otto cycle. Other names for the Atkinson engine are "Utility 1892," "Cycle 1887," and "Differential 1882." It is a kind of internal combustion engine that saves more money than conventional Otto-cycle engines while increasing efficiency at the sacrifice of power density.

Some modern automobile engines, like the Prius and hybrids, as well as some non-hybrid vehicles, incorporate his inventions. These engines have variable valve timing, which allows them to operate part-time in the Atkinson cycle. In this instance, when operating as a traditional Otto cycle engine, it can offer a decent economy and conventional power density while operating in the Atkinson cycle.

Three Atkinson engine designs exist: The Atkinson-cycle engine, the cycle engine, and the practical engine are the first three.

How does the Atkinson cycle engine work?

Through a toggle-jointed linkage with nonlinearity, a single crankshaft was connected to two opposing pistons. One piston remained nearly motionless for half a revolution. At the same time, the other approached and returned, and for the subsequent half-revolution, the second piston was roughly motionless while the first came and returned. The Atkinson-cycle engine's valve remains open for a bit longer. Fuel economy is increased since the piston doesn't have to work as hard to overcome friction because there is less pressure in the cylinder. Through the open valve, some of the gasoline vapour escapes back into the intake manifold; however, it is drawn back the next time the valve opens, ensuring that no fuel is lost.