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The first implementation of the Atkinson cycle was in 1882; unlike later versions, it was arranged as an opposed-piston engine, the Atkinson differential engine. [6] [7] In this, a single crankshaft was connected to two opposed pistons through a toggle-jointed linkage that had a nonlinearity; for half a revolution, one piston remained almost stationary while the other approached it and ...
Not all of the extra efficiency of the Prius is due to the HSD system: the Atkinson cycle engine itself was also designed specifically to minimize engine drag via an offset crankshaft to minimize piston drag during the power stroke, and a unique intake system to prevent drag caused by manifold vacuum ("pumping losses") versus the normal Otto ...
2NR-VEX engine on a Toyota Yaris Cross. Based on the 1.5-litre 2NR-VE engine, the 2NR-VEX unit is an Atkinson cycle engine used with a hybrid system paired with an electric motor and a lithium-ion battery. Maximum output: 67 kW (90 hp; 91 PS) Maximum torque: 121 N⋅m (89 lb⋅ft) Applications: Toyota Yaris Cross Hybrid (NYC200, 2023–present) [8]
The conventional Otto cycle (higher power density, more low-RPM torque, lower fuel efficiency) is often modified to an Atkinson cycle or Miller cycle (lower power density, less low-rpm torque, higher fuel efficiency; sometimes called an Atkinson-Miller cycle). The smaller engine, using a more efficient cycle and often operating in the favorable ...
The Atkinson-cycle engine is a type of single stroke internal combustion engine invented by James Atkinson in 1882. The Atkinson cycle is designed to provide efficiency at the expense of power density , and is used in some modern hybrid electric applications.
K – On-demand Atkinson cycle in non-hybrid engines; S – D-4S Gasoline direct injection; T24A-FTS T24A is a 2.4-liter engine, as denoted by the "24" in "T24A" F – Normal cylinder head DOHC; T – Turbocharged; S – D-4S Gasoline direct injection; Some engines don’t share the same displacement as with the one found in the engine code.
The most efficient cycle is the Atkinson Cycle, but most gasoline engine makers use the Otto Cycle for higher power and torque. Some engine design, such as Mazda's Skyactiv-G and some hybrid engines designed by Toyota utilize the Atkinson and Otto cycles together with an electric motor/generator and a traction storage battery.
It can work in the Otto cycle and a modified-Atkinson cycle depending on output power. It was first introduced in the Camry in October 2018 for the Thai market. The output is 167 PS (123 kW; 165 bhp) at 6500 RPM and 199 N⋅m (147 lbf⋅ft) at 4600 RPM. [16] Applications: Camry 2.0 (XV70, Russia, Thailand, Singapore, China)