Fuel Economy

1  -  17  of  17

September 2015, - Feature

The Downspeeding Learning Curve

Rolling two-lane roads are no place for a downsped driveline. If you’re considering a downspeeding axle spec, application and terrain must be considered. Photo: Jim Park

By Jim Park

Today's "downsped" drivetrains can improve fuel economy, but high torque and low axle ratios can create all sorts of havoc with drivetrain components.

Tags: Fuel Economy, Axles, Downspeed

June 2015, - Feature

Breaking the 11 MPG Barrier

For Michael Niss, reaching 11 mpg is not just a dream. It is quickly becoming a reality through his project company, Breaking 11.

By Stephane Babcock

For Michael Niss, reaching 11 mpg is not just a dream. It is quickly becoming a reality through his project company, Breaking 11.

Tags: Trailers, Fuel Economy, Aerodynamics

June 2015, - Feature

High-mpg Model Round-Up

Start with these aero tractors for the best fuel economy.

By Tom Berg

The best fuel economy starts with a truck model specifically designed to squeeze the most possible miles from a gallon of diesel fuel and all major builders offer these for their on-highway customers.

Tags: Kenworth, International, Volvo Trucks, Freightliner, Peterbilt, Fuel Efficiency, Western Star, Mack Trucks, Fuel Economy

May 2015, - Feature

The Automated Revolution is Real

Eaton AMTs come with a choice of a dash-mounted keypad shift control or the more driver-friendly cobra-head shift selector.

By Jim Park

After 20 years on the fringes of the heavy-duty transmission world, the switch from sticks to semiconductors may be reaching the tipping point.

Tags: Fuel Economy, Transmissions, Automated Manual Transmissions

March 2015, - Feature

12 Ideas For Lightweighting Your Trucks

By Tom Berg

Over the years, manufacturers have designed vehicles and components to reduce weight, and fleets have tried many of them. From their wisdom, we offer a dozen lightweighting ideas for Class 8 trucks and tractors.

Tags: Fuel Efficiency, Fuel Economy, Engines, Lightweighting

February 2015, - WebXclusive

Q&A: Fleet Advantage's John Flynn on Truck Leasing Past, Present and Future

John Flynn. Photo courtesy Fleet Advantage.

By Deborah Lockridge

What does Big Data have to do with the future of truck leasing? Everything, says John Flynn, CEO of Fleet Advantage, a truck leasing company that believes in using data analytics to determine "economic obsolescence" in making equipment life cycle decisions.

Tags: Spec'ing, Fuel Economy, Truck Leasing, Fleet Advantage, Private Fleets

November 2014, - WebXclusive

Direct/Overdrive Adds Efficiency to Bulk-Hauling Volvos

I-Shift's selector does a lot of things, but it won't prompt an upshift to 12th when its controls know that the rig is heavily loaded. Photo:Tom Berg

By Tom Berg

Bulk hauling rigs that consistently go out loaded and return home empty constitute the best application for the new feature.

Tags: Volvo Trucks, Fuel Economy, Volvo XE-Adaptive Gearing, Transmissions, Automated Manual Transmissions

August 2014, - WebXclusive

How Tires Affect Fuel Economy Testing

Apples to oranges. Accurate fuel economy test results can only be obtained using idendical trucks, including the tires.

By Jim Park

When setting out to evaluate a fuel-saving product, you don't want your numbers skewed by differences in rolling resistance from the tires. With some fuel-saving devices promising only marginal gains, the tires' contribution to the fuel consumption can adversely affect the apparent performance of the product. Here's what to watch for when setting up an evaluation or testing program.

Tags: Fuel Economy, SAE, Low Rolling Resistance Tires, Tires

August 2014, - WebXclusive

Medium-Duty Tires Go Fuel-Efficient

Downtown streets still pose a threat to delivery fleets' tires. Nobody will give up protection for fuel economy; the tire people say they won't have to.

By Jim Park

The factors driving tire design for medium-duty trucks has changed. Today, tire makers must balance fuel efficiency and bulletproof durability to stand up to a harsh P&D environment.

Tags: Medium-Duty Trucks, Fuel Economy, Tires, Low Rolling Resistance Tires

August 2014, - WebXclusive

Direct Drive or Overdrive?

By Eaton

The long-running debate over which type of transmission — direct drive or overdrive — provides the greatest efficiency is one that’s not easily settled and not likely to go away.

Tags: Eaton, Spec'ing, Fuel Economy, Transmissions

July 2014, - WebXclusive

The Peterbilt-Cummins SuperTruck, Part 2: More Secrets Revealed

Cummins ISX15 with waste heat recovery from the front-right side

By Jim Park

The Peterbilt-Cummins SuperTruck project achieved almost-unheard-of gains of 68% in freight efficiency over a 24-hour duty-cycle, a 50% improvement in freight efficiency on an 11-hour drive-cycle and a 20% improvement in the thermal efficiency of the engine. How did they do it, and what does that mean?

Tags: Cummins, SmartWay, Peterbilt, EPA, U.S. Department of Energy, SuperTruck, Engines, Fuel Economy

April 2014, - WebXclusive

MATS Focus: Integrated Drivetrains and Automated Transmissions

The Cummins ISX 15 SmartAdvantage powertrain.

By Rolf Lockwood, Executive Contributing Editor

If there was an unspoken theme to this year's Mid-America Trucking Show, it was probably the focus on integrated drivetrains. And Martin Daum, president and CEO of Daimler Trucks North America, had some interesting things to say about automated transmissions in general.

Tags: Volvo, Cummins, Paccar, Eaton, Fuel Economy, Transmissions, Mid-America Trucking Show, Daimler Trucks North America, Automated Manual Transmissions, Detroit DT12, ZF

March 2014, - WebXclusive

The Lowdown on the New Low-Viscosity Oils

Kinematic viscosity is what you might envision when thinking of viscosity – gravitational flow. But the new oils will meet viscosity standards measured at high temperatures/high shear conditions.

By Deborah Lockridge

Exactly what is this "high-temp, high-shear" viscosity engine oil standard in the works for the next round of EPA emissions standards, and what are engine makers doing to make sure engines will still be well protected?

Tags: Fuel and Oil, Engines, Fuel Economy, GHG emissions, Engine Oil, TMC, API

March 2014, - Cover Story

2014 Truck Fleet Innovators: Transforming Trucking

By Deborah Lockridge

Each year, Heavy Duty Trucking honors a handful of the country’s most forward-thinking fleet executives with the title of “HDT Truck Fleet Innovator.” Read how this year's winners are using the power of collaboration to spec the best trucks and operate more efficiently -- and profitably.

Tags: Truck Fleet Innovators, HDT Truck Fleet Innovators, Frito-Lay, PepsiCo, Meijer, NFI, Fuel Economy, Vehicle Spec'ing, Alternative Fuels & Hybrids, Natural Gas

November 2013, - Cover Story

HDT's Top 50 Green Fleets

By Deborah Lockridge

Green strategies vary greatly depending on the operation. For one company, natural gas might make sense. For another, green might mean solar-powered warehouses. For others, it’s all about fuel-efficient specs and driver training.

Tags: Green Fleets, Alternative-fuel vehicles, Alternative Fuels & Hybrids, Natural Gas, Fuel Economy, MPG, Aerodynamics

November 2013, - Feature

Commentary: How Smart is SmartWay?

By Rolf Lockwood, Executive Contributing Editor

Can we depend on the fuel-saving numbers provided by the U.S. Environmental Protection Agency’s SmartWay program? Executive Contributing Editor Rolf Lockwood says he's not so sure, in the aftermath of a recent test results story.

Tags: CARB, EPA SmartWay, Fuel Economy

January 2013, - Feature

Dos and Don'ts when Spec'ing Dry Vans

By Kate Harlow

When you are getting ready to put a dry van trailer out to pasture and begin the process of searching for its replacement, there are many things to consider: maintenance costs, fuel-economy regulations, payload and the weight of the trailer, to name a few. One way to navigate through the maze of options is to follow some tips a few trailer manufacturers shared with us.

Tags: Trailers, Payload, Dry Vans, Capacity, MPG, Fuel Economy



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