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CFM International completes design freeze for LEAP-1B engine; 15% improvement in specific fuel consumption

Green Car Congress

CFM International has completed design freeze for the advanced LEAP-1B engine, the exclusive powerplant for the Boeing 737 MAX, paving the way for the first full engine to test in mid-2014. This now allows CFM to finalize and release detailed engine design drawings, which it will do over the next six months.

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2017 Chrysler Pacifica wins Altair Enlighten Award for weight reduction in full vehicle category; Toyota, Faurecia and AP&T module, technology winners

Green Car Congress

The winner of the Full Vehicle category was the 2017 Chrysler Pacifica, which is 249 pounds (113 kilograms) lighter than its predecessor. 2017 Chrysler Pacifica. All-new 2017 Chrysler Pacifica body structure 72% high-strength steel. Weight reduction is a key contributor to improved fuel economy. Earlier post.). Module category.

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New Icon-class ships from Royal Caribbean to be powered by LNG with 2022 delivery; testing hydrogen fuel cells in 2017

Green Car Congress

The ships will join the fleet of Royal Caribbean International. In the meantime, the company said, it will begin testing fuel cell technology on an existing Oasis-class ship in 2017, and will also run progressively larger fuel cell projects on new Quantum class vessels being built in the next several years. —Harri Kulovaara.

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Daimler balks at use of low GWP R-1234yf refrigerant, citing new internal safety findings; wants to continue using R-134a

Green Car Congress

Daimler announced that findings from a new internal investigation have raised questions on the safe usage of R-1234yf as a replacement refrigerant in mobile air conditioning (MAC) systems. This was determined by numerous laboratory and crash tests carried out by international vehicle manufacturers and independent institutions.

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Toyota unveils new TNGA-based engines and transmissions and improved hybrid systems; deployment begins in 2017

Green Car Congress

Toyota intends to deploy these new powertrain units in a rapidly broadening range of vehicle models, starting in 2017. Furthermore, to standardize the basic structure of these new units, Toyota used modular design (unified design). Toyota has named its new line of internal-combustion power plants “Dynamic Force Engines”.

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Hydrogen Opposed Piston Engine Working Group formed

Green Car Congress

Papers from BMW and Hydrogen Energy Research Lab show that sufficiently lean hydrogen combustion in properly designed combustion chamber results in close to zero NO x. OP engines utilize direct injection after ports closure to avoid the risk of fuel short circuiting out the exhaust. The addition of a spark plug is a new design element.

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ORNL-led team developing breakthrough high-temperature, high-strength Al alloy for advanced light-duty engines

Green Car Congress

Projected conditions for internal combustion engines in 2025 push light-duty engine exhaust temperatures into the low end of gas turbine regimes, Haynes said. The increasing piston, cylinder, head, exhaust valve and turbocharger temperatures represent significant structural materials—and cost—challenges.

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