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

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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. to the thermodynamics, not to a particular engine. Click to enlarge. LiquidPiston, Inc.

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Comparative study finds that B20 increases emission rates of a number of pollutants in both light- and medium-duty diesel engines at idle

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L engines at idle. L) diesel engines at idle and load, using a biodiesel blend (B20) and conventional ultralow sulfur diesel (ULSD) fuel. L) diesel engines at idle and load, using a biodiesel blend (B20) and conventional ultralow sulfur diesel (ULSD) fuel. L/2004 calibration engines. Emission rates for the 1.7

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FedEx adds 1,900 new lightweight composite Reach vans to fleet; 35% fuel efficiency improvement

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liter Isuzu diesel engine, demonstrates a 35% fuel efficiency improvement over traditional vehicles in the FedEx Express fleet. This conversion not only reduces fuel consumption and emissions, but will also extend the engine life in fleet vehicles by supplementing the necessary power with their hybrid-electric drive train.

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Global Commercial Vehicle Industry Meeting endorses harmonized global approach to improve fuel efficiency and reduce GHGs

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Leading global manufacturers of heavy-duty commercial trucks and engines gathering at the annual Global Commercial Vehicle Industry Meeting endorsed a harmonized global approach as an effective pathway to further improve energy efficiency and reducing greenhouse gas emissions from commercial vehicles. Earlier post.). Earlier post.).

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Study Finds Fumigation Ethanol Operation with Diesel Reduces PM and NOx, While Oxidation Catalyst Reduces Resulting Increased CO and HC

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Ethanol fumigation is a form of dual-fuel engine operation in which the ethanol is premixed with the intake air by injection or vaporization of the alcohol, while the diesel fuel is injected directly into the cylinder as in a traditional diesel engine. The engine was not equipped with EGR. The engine was not equipped with EGR.

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New GM/Tula DSF cylinder deactivation technology could boost fuel efficiency in engines by up to 15%

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GM is working closely with Tula Technology, a Silicon Valley-based supplier of Dynamic Skip Fire (DSF)—a software-enabled powertrain technology that integrates advanced digital signal processing with advanced powertrain controls to create a variable displacement engine.

GM 150
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Alternative Fuel Technologies Awarded Phase 1 US Army Contract for Ultra-high Pressure Injection System for JP8

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It is generally agreed that very high injection pressures are needed to improve engine thermal efficiency fuel economy, lower heat rejection, and to minimize exhaust aftertreatment complexity and costs. Millions of this type of injector have been used since the mid 1990s by Navistar, Ford, Caterpillar, and Isuzu.).