Who makes Atkinson engines?
Honda engineers update an established engine design with leading-edge technology to create an extremely fuel-efficient powerplant. The Feature: The CR-V Hybrid engine makes for excellent efficiency as well as responsive power output.
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.
What are the benefits of an Atkinson cycle engine?
The key advantage is higher efficiency than is achievable in an Otto engine, albeit with some loss of low-speed output. The Atkinson cycle is ideal for hybrids because their electric motor(s) make up for the lost low-speed output.
What is a Miller and Atkinson cycle engine?
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 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.
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.
How does a Atkinson cycle 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.
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.
How does an Atkinson cycle engine work Auto?
Same goes for an Atkinson cycle engine, so here’s a quick refresher of the process: Intake stroke: Sucks air and fuel into the cylinder Compression stroke: Squishes the mixture so when the spark goes off, it will explode — big time Power or expansion stroke: Uses the force created by the explosion to move the piston down the cylinder
Why was the expansion stroke used in the Atkinson cycle?
The common thread throughout Atkinson’s designs is that the engines have an expansion stroke that is longer than the compression stroke, and by this method the engine achieves greater thermal efficiency than a traditional piston engine.
When did James Atkinson invent the internal combustion engine?
The Atkinson-cycle engine is a type of internal combustion engine invented by James Atkinson in 1882.
How does the Atkinson cycle change the compression ratio?
The Atkinson cycle modifies that process by leaving the intake valves open for the first moments of the compression stroke, as the piston travels toward top dead center, which effectively lowers the compression ratio of, say, 10:1 to something more like 8:1, or so. That adjustment reduces the force on the piston on the power stroke.