Otto cycle


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Otto cycle

n
(General Engineering) an engine cycle used on four-stroke petrol engines (Otto engines) in which, ideally, combustion and rejection of heat both take place at constant volume. Compare diesel cycle
[C19: named after Nikolaus August Otto (1832–91), German engineer]
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The V8 engine adopts Atkinson cycle to enhance fuel efficiency at cruising speeds and Otto cycle for higher performance levels when accelerating.
The clever bit is that by using variable valve timing the engine can swap from the conventional Otto cycle to the Atkinson cycle (in which the inlet valves are held open longer and allow air to reverse flow through the inlet manifold) to save fuel at cruising speeds.
The patent application relates to a turbocharged split-cycle engine that divides the four strokes of a conventional Otto cycle engine over two paired cylinders.
The RX 450h brings the sixth-generation of the Synergy Hybrid System and with it, the first application of the Atkinson Cycle instead of the Otto Cycle in the SUV.
This has resulted in an engine that is significantly more energy-efficient than traditional gas-powered engines in which the biogas combusts in an Otto cycle," says Inge Horkeby, Director Environmental Affairs AB Volvo.
Objective: The Anyoon Rotary Engine is a concept engine that incorporates a unidirectional rotary design and obeys the Otto cycle to perfection.
0L EcoBoost cylinder head with integrated exhaust manifold Figure 14: Progress through powertrain technologies Figure 15 The effects of downsizing on fuel consumption Figure 16: Regional turbocharger penetration Figure 17: Low-end torque versus mid-high speed brake specific fuel consumption for gasoline engines from MY2005 to MY2012 Figure 18: Atkinson versus Otto cycle operation Figure 19: A schematic of homogenous and stratified charge modes Figure 20 Honda i-VTEC system Figure 21 BMW Valvetronic system Figure 22 Comparison of airflow with VVT on a diesel engine Figure 23 Variable valve actuation on 6.