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Achates Power continues development of opposed-piston technology for US Army vehicles

Green Car Congress

The family of engines strategy uses a common power cylinder system across several different engine variants to address a range of power and torque requirements in order to serve multiple military vehicles with a common architecture. In December 2020, Achates Power announced that their 10.6L

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Achates Power developing light-duty two-stroke opposed-piston diesel engine: the OP4

Green Car Congress

The OP4 light-duty opposed-piston diesel. Achates Power, which is developing a family of two-stroke, compression-ignition (CI) opposed-piston (OP) engines, has designed and is developing a light-duty diesel concept engine, the OP4. Diesel Engines Fuel Efficiency' Click to enlarge. kW, compared to 4.1

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UK LowCVP Launches ‘Technology Challenge’ to Accelerate Low Carbon Vehicle Innovation; Libralato Engines First Registrant

Green Car Congress

The Libralato engine is a rotary engine comprising two interlaced circular chambers of slightly different diameters. The Libralato engine has only four moving parts which perform the four phases in every revolution of the engine. The rotors do not rely on casing contact for their location as in Wankel engines.

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Concept: Downsized and Supercharged Hybrid Pneumatic Engine for 30%+ Reduction in Fuel Consumption

Green Car Congress

The HPE was long thought to be a system in which all engine valves had to be actuated in a fully variable manner to allow for two-stoke pneumatic modes and still enable the four-stroke combustion mode. In large naturally-aspirated SI engine, high-friction, pumping losses and part-load operation all contribute to poor fuel efficiency.

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Michigan State University Receives $2.5M ARPA-E Award to Build Wave Disc Engine/Generator for Series Hybrid Applications

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Wave rotor technology has been explored since 1906, although its first significant application was in 1940 by Brown Boveri Company (BBC, today ABB) which used it as a high pressure stage for a gas turbine locomotive engine. Mazda produced 150,000 Comprex diesel cars. The air-fuel mixture can be radially stratified.

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DOE to award $55.8M for advanced vehicle technologies; $35M for fuel cell and hydrogen

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Developing a simulation model database of commercially available cells to enable wider evaluation and adoption of computer aided engineering tools for the design of battery packs and cells. Increased efficiency may be achieved using one or more proposed enabling technologies on a baseline engine. turbomachinery.

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LiquidPiston introduces latest X-series version of HEHC rotary engine; targeting 58% peak BTE, 2 hp/lb power density

Green Car Congress

Isuzu D201 35 hp diesel engine (left) and the LiquidPiston 40 hp X2 Prototype (right). Other features of the X2 include: Quiet operation: engine lacks poppet valves and over-expansion minimizes exhaust noise. HEHC thermodynamic advantages relative to the diesel and the Otto cycles. Click to enlarge.

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