Why are Atkinson cycle gasoline engines considered more advantageous than others?
The Atkinson cycle is ideal for hybrids because their electric motor(s) make up for the lost low-speed output. Compression and expansion ratios are the same in an Otto engine. Atkinson wins on efficiency because its expansion ratio is significantly larger than its compression ratio.
What is an Atkinson cycle gasoline engine?
The Atkinson-cycle engine is a type of internal combustion engine invented by James Atkinson in 1882. The Atkinson cycle is designed to provide efficiency at the expense of power density. A variation of this approach is used in some modern automobile engines.
How much more efficient is an Atkinson cycle engine?
The larger 1.3-liter Atkinson cycle engine uses a high compression ratio (13.5) and all the same engine innovations to achieve thermal efficiency of 38 percent.
What is the different between Atkinson cycle and Otto cycle?
An Atkinson cycle has a greater work output and a higher thermal efficiency than the Otto cycle at the same operating condition. The compression ratios that maximize the work of the Otto cycle are always found to be higher than those for the Atkinson cycle at the same operating conditions.
What is the most complex engine in modern cars?
Most Amazingly Complicated Engines Of All Time
- Saab Variable Compression.
- Lancia-Abarth Triflux.
- Cadillac V-8-6-4.
- Volkswagen W8.
- H16 BRM.
- Cizeta V16.
- Bugatti W16.
- Camcon Automotive Intelligent Valve Actuation. Cylinder deactivation and variable compression engines are now out in the real world.
What is the difference between Miller and Atkinson-cycle?
An Atkinson-cycle engine differs from a Miller-cycle engine in that the Miller-cycle engine uses some device to push air into the system – a supercharger or turbocharger – while the Atkinson-cycle engine is naturally aspirated.
How does the Atkinson engine work?
The pistons are powered by gasoline, sprayed into the engine and detonated by the spark plug. The piston moves four times in each cycle: down to draw in gasoline vapour, up to compress it, down when the vapour ignites and explodes, and then up to push out the exhaust.
How does an Atkinson-cycle engine save fuel?
An Atkinson-cycle engine works the same way, but with a twist. In an Atkinson-cycle engine, the valve stays open slightly longer. Since there’s now less pressure in the cylinder, the piston doesn’t have to work as hard to overcome friction, which in turn improves fuel efficiency.
What is the main difference between Miller and Atkinson cycle engines?
Are there V20 engines?
A V20 engine is a twenty-cylinder piston engine where two banks of ten cylinders are arranged in a V configuration around a common crankshaft. Large diesel V20 engines have been used in diesel locomotives, haul trucks, electric generators and marine applications.
Are Atkinson engines direct injection?
If I’m not mistaken, this engine is an indirect fuel injection engine. Indeed, direct injection gasoline engines tend to emit very thin particulate matters which are, at the end, as dangerous for health as with diesel engines.