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Cummins & Tula demonstrate Diesel Dynamic Skip Fire (dDSF) cylinder deactivation; up to 66% reduction in NOx on CARB LLC #7

Green Car Congress

By using dDSF software to control cylinder deactivation in a diesel engine, Cummins and Tula demonstrated significant reductions in emissions and fuel consumption. Like DSF for gasoline engines, dDSF uses individual cylinder deactivation control strategies to meet torque demand at optimal fuel and aftertreatment efficiency.

Diesel 286
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Tula presenting diesel Dynamic Skip Fire technology at Future Diesel Powertrain Summit in Shanghai

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As demonstrated through testing, Tula’s dDSF technology reduces tailpipe NO x emissions by up to 66% while also reducing CO 2 emissions by up to 4%. Like DSF for gasoline engines, dDSF uses individual cylinder deactivation control strategies to meet torque demand at optimal fuel and aftertreatment efficiency. Source: Tula.

Diesel 221
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FEV working on water injection system using exhaust condensate; fuel consumption improvements up to 16% possible

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FEV is developing a water injection system for internal combustion engines using condensate from exhaust gases, the “Extended Direct Condensate Injection” system. in the region of the minimum specific fuel consumption on a stoichiometric combustion concept with Miller cycle and cooled external exhaust gas recirculation. Earlier post.).

Exhaust 150
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Brunel to use Camcon Single Cylinder IVT in researching future powertrain concepts

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The system uses the company’s Intelligent Valve Technology (iVT) and is intended to speed up OEM and Tier 1 engine development significantly, helping meet upcoming emissions regulations while also reducing cost. Both conventional and unconventional event profiles can be achieved. Camcon SCI.

Concept 275
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New gasoline Endurance V8 with VVEL and DIG to power Nissan Titan full-size pickups

Green Car Congress

liter Endurance V8 gasoline engine will be available in the all-new Titan and Titan XD full-size pickup trucks. The engine features four-valves per cylinder; Variable Valve Event & Lift (VVEL); and Direct Injection, and is rated at 390 hp (291 kW) @ 5,800 rpm and 401 lb-ft (544 N·m) of torque @ 4,000 rpm.

Gasoline 150
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Toyota reduces fuel consumption and emissions across the new Auris range; 13% average reduction in CO2 compared to predecessors; gasoline, diesel and hybrid

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Aerodynamic improvements, weight savings and engine enhancements have reduced fuel consumption and CO 2 emissions across the range. Toyota anticipates a 1/3 full hybrid, 1/3 gasoline, 1/3 diesel engine mix. Average emissions for Auris—which is designed for the European market—have fallen steadily over the last years.

Gasoline 252
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Small-displacement two-stroke H2 engine could address performance and emissions cost-effectively for recreational market; potential for Asian motor vehicle fleet

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Comparison of brake thermal efficiency and specific fuel consumption at rated power (ICOMIA Mode 5), hydrogen vs. gasoline engines. This is due to raw, externally premixed fresh charge comprising air, fuel and lube oil being short-circuited into the exhaust during the scavenging process. Oh and Plante. Click to enlarge. Oh and Plante.

Engine 329