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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.
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.
Very high compression-moderated Atkinson cycle engine. Longer stroke to bore ratio (under-square design). Change of port end shape and expansion of seat inner diameter. Application of updated D-4S (multi-hole injector) system to achieve "high-speed combustion", resulting in thermal efficiency over 40%.
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]
James Atkinson (1846 – 1914) [1] of Hampstead was a British engineer who invented several engines with greater efficiency than the Otto cycle. The Atkinson cycle engines were named the "Differential 1882", "Cycle 1887" and "Utilite 1892". The most well-known of Atkinson's engines is the "Cycle 1887", patented in 1887. [2]
The Smartstream G2.0 MPi Atkinson Cycle (G4NS) is an inline 4-cylinder engine with MPi and a 12.5:1 compression ratio; the engine makes 149 PS (147 hp; 110 kW) at 6,200 rpm and 18.3 kg⋅m (132 lb⋅ft; 179 N⋅m) of torque at 4,500 rpm. Applications (G4NJ/G4NL) Hyundai Alcazar (SU2 LWB) (2021–present) Hyundai Creta (SU2b) (2021–present)
The 3.8L Atkinson cycle version was introduced with the Hyundai Palisade and Kia Telluride. Compression ratio is 13.0:1 and the engine produces 295 PS (217 kW; 291 hp) at 6,000 rpm and 36.2 kg⋅m (355 N⋅m; 262 lb⋅ft) of torque at 5,200 rpm. Applications: 2018–present Hyundai Palisade (LX2) 2019–present Kia Telluride
The Toyota 8ZR-FXE is a 1.8 L (1,797 cc) Atkinson cycle engine paired with electric motor/generators in a hybrid drive system. This engine is an analogue of the 2ZR-FXE for use in China only. [14] Specifications. Type: inline 4 cylinder DOHC 16 valve VVT-i Atkinson cycle; Exhaust volume: 1.8 L (1,798 cc)