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New Jacobs system helps eliminate cabin shake during start-up, shutdown

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BLOOMFIELD, Conn. — Jacobs Vehicle Systems has introduced Active Decompression Technology (ADT) that enables heavy-duty commercial vehicles to benefit from an engine stop-start system and eliminating engine-shake at both start-up and shutdown.

In addition to improving fuel economy and reducing emissions, ADT also improves cold engine starts, reduces loading and wear on engine components during start-up, and makes start-up faster.

Jacobs’ ADT device incorporates valve actuation technologies proven over many millions of miles and can be cost-effectively added to many engine platforms, according to Steve Ernest, vice president of engineering and business development.

“Stop-start engine technology, which automatically switches off the engine when it would otherwise be idling, is widely adopted by automotive manufacturers, however, it is less common in heavy-duty commercial vehicles,” Ernest said. “This is largely because of the intrusive engine and cabin-shake experienced whenever a heavy-duty diesel engine starts or stops, and because of the cost of technologies needed to mitigate increased wear-and-tear on the starter motor, ring-gear, and battery. ADT significantly reduces these issues.”

Ernest said extensive testing had shown that ADT reduces the magnitude of engine-shake during shutdown by 90 percent, which is when vibrations transmitted to the cabin are of greatest frequency and strength. This has the additional benefit of preventing disturbance to drivers sleeping in cabs overnight when there are automated engine starts and stops to maintain battery charge.

The ADT device is automatically activated by the engine control unit (ECU) whenever the engine shuts down or starts up, and works by keeping the engine valves open and the cylinders decompressed.

“When switching off the engine, it coasts to a smooth shutdown without causing the cab to shake,” Ernest said. “When starting up, the engine is kept in a decompressed state which decreases cranking torque by 40 percent and allows the engine to spin up to twice its normal speed for smoother starting, faster priming of the fuel system, and decreased wear on the starter gear, fly wheel and other components. This can also allow the use of smaller and lighter batteries, cables, and starter.”

By enabling the engine to be turned-over while decompressed, ADT also improves start-ups in cold temperatures by enabling the engine to reach its critical compression ignition speeds. When combined with supplemental air inlet heaters, ADT also enables the engine cylinders to be pre-warmed without the engine load from compression; especially useful when freezing temperatures have reduced battery levels. When high cranking speed is reached, the engine compression is reactivated and cylinder-fuelling begins.

“ADT is another development of Jacobs’ well-proven valve actuation technologies to deliver another set of benefits,” Ernest said. “Some OEMs will be interested in ADT because it enhances vehicle refinement by eliminating engine-shake and cabin-shake. Other customers – particularly those whose vehicles endure heavy stop-start cycles – will welcome the reduced component load, fuel economy and emissions advantages.”

The launch of ADT follows the recent introduction of two other new applications of Jacobs’ valve actuation technology: 2-Step VVA (variable valve actuation) and CDA (cylinder deactivation technology).

The 2-Step VVA system on the intake valve manipulates the timing of valve-closing to optimize compression ratio versus load, and improve emissions.

When applied to the exhaust valve, the timing of the valve opening is modified to improve transient turbocharger response and to keep the aftertreatment system hot during low load operation.

CDA disables the opening of the intake and exhaust valves of non-fueling cylinders to achieve higher exhaust temperatures in the operating cylinders, reducing emissions, and increasing exhaust temperatures for improved SCR (Selective Catalytic Reduction) efficiency.

Operating fewer cylinders enables large engines to have the fuel economy of smaller engines.

To learn more about ADT click here.

 

 

 

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Equipment

Great Dane manufacturing facility produces 125,000th trailer

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The 125,000th trailer to come off the line at the Wayne plant was a new Everest Single-Temp reefer designed exclusively for Schuster Company of Le Mars, Iowa, a customer of Great Dane’s since 1988.
(Courtesy: GREAT DANE)

WAYNE, Neb. — Great Dane’s Wayne, Nebraska, manufacturing facility revealed the production of its 125,000th refrigerated trailer during a commemorative celebration held at the plant.

Attendees of the celebration included Wayne’s Mayor Cale Geise, Schuster Company President Steve Schuster and Jim Hawk Truck Trailers President Jim Hawk III.

Great Dane’s President Dean Engelage, along with representatives from the Wayne facility and the company’s corporate offices in Chicago, Illinois, and Savannah, Georgia, were also in attendance.

The 125,000th trailer to come off the line at the Wayne plant was a new Everest Single-Temp reefer designed exclusively for Schuster Company of Le Mars, Iowa, a customer of Great Dane’s since 1988.

“We’re extremely proud to reach this historic milestone here in Wayne,” said Lee Byers, plant manager. “It’s a clear testament to the high quality of the product we produce and to the spirit of the hundreds of hard-working craftsmen who build these best-in-class trailers for our valued customers.”

The Wayne manufacturing facility produces Great Dane’s premier Everest Single-Temp refrigerated trailers, which are primarily used for long-haul truckload operations.

This 257,000-square-foot, 83-acre facility began operations in 1986 with two production lines and has since undergone five building additions.

Today, the Wayne plant employs nearly 700 people and builds 5,000 trailers per year for some of the nation’s largest fleets, including Schuster, Walmart, IWX, JFI, Marten Transport, Decker, Freymiller, Van Wyk, Interide, California Overland, Associated Wholesale Grocers, Sargento and more.

For more information. Visit Great Dane online at www.greatdane.com.

 

 

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Coalition again pushing for 33-foot twin trailers, sends letter to infrastructure panel members

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FedEx is a member of the Americans for Modern Transportation Coalition and has long been a proponent of twin 33-foot trailers. (Associated Press: JUSTIN KASE CONDER)

WASHINGTON — The Americans for Modern Transportation Coalition is continuing its effort to allow twin 33-foot trailers on the nation’s highways.

The standard for tandems currently is twin 28-foot trailers.

In a letter to House Transportation and Infrastructure Committee Chairman Peter DeFazio, D-Ore., and Ranking Member Sam Graves, D-Mo., the coalition identified longer trailers as a way policy makers can leverage technologies and efficiencies developed by the private sector to create “the infrastructure system of the future.”

In the letter, coalition Executive Director Randy Mullett said years of underinvestment and a lack of attention to the nation’s infrastructure has left American families in harm’s way, spurred economic inefficiencies, and put undue stress on the environment.

“At no cost to taxpayers, Congress can act to modernize trucking equipment and increase the national twin trailer standard from 28 feet to 33 feet,” Mullett said.

He listed what he called “immediate and meaningful improvements” such as:

  • Reduced congestion because gains from twin 33-foot trailers would mean fewer trucks on the road and 53.2 million hours saved due to less congestion
  • Improved safety because twin 33s “perform better than many other truck configurations on four critical safety measures, including stability and rollover.” Research shows that the adoption of twin 33-foot trailers would result in 4,500 fewer truck accidents annually, Mullett maintains.
  • Economic benefits because 33-foot trailers can move the same amount of freight with 18 percent fewer truck trips, allowing consumers and businesses to realize $2.6 billion annually in lower shipping costs and quicker delivery times
  • Longer life cycles for roads and bridges because use of the longer trailers would result in 3.1 billion fewer truck miles traveled each year, and
  • Environmental gains because these trailers would equate to 255 million fewer gallons of fuel and 2.9 million fewer tons of CO2 emissions.

“The private sector continues to make investments in our workforce, new technologies, and existing equipment to ensure that our fleets are as efficient, sustainable, and safe as possible,” Mullett wrote.

“We need the same forward-looking effort from our partners in federal, state and local governments so that all Americans have access to the full promise enabled by a modern transportation system. We look forward to working with the House Transportation and Infrastructure Committee to seize this opportunity to usher the country into a new era of safety

and infrastructure investment.”

Among the members of the coalition are FedEx and UPS, two companies that have vigorously fought to get Congressional approval of the longer trailers.

 

 

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ACT Research says preliminary January trailer orders show 7% drop from December

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An ACT Research executive said with backlogs extending through the year for dry vans and reefers, OEMs would likely need to quickly open 2020 orderbooks to allow for further backlog growth in the near-term. (Courtesy: GREAT DANE)

COLUMBUS, Ind. — ACT’s preliminary estimate for January 2019 net trailer orders is 25,800 units.

Final volume will be available later this month.

ACT said its methodology allows it to generate a preliminary estimate of the market that should be within +/- 3 percent of the final order tally.

“While the industry had the weakest January order volume since 2016, it was still sufficient enough to generate very minor orderboard growth,” said Frank Maly, ACT’s Director of CV transportation analysis and research. “January net orders were off 7 percent versus December and 35 percent down year-over-year. Slower dry van and reefer trailer volume contributed to the declines. Indications are lower orders were not the result of weak fleet demand, as some OEMs report unwillingness to accept additional orders that would extend orderboards that, according to some reports, already fill available 2019 build slots.”

Maly also noted that the slight gain in the orderboard means that January was the third consecutive month that the industry posted an all-time record backlog, although the pace of improvement is beginning to wane.

“With backlogs extending through the year for dry vans and reefers, OEMs would likely need to quickly open 2020 orderbooks to allow for further backlog growth in the near-term,” he said. “Also, although the industry reported the highest monthly cancellations since August 2016, the rate of cancellations versus the orderboard remains well within acceptable limits.”

ACT Research is a leading publisher of commercial vehicle truck, trailer, and bus industry data, market analysis and forecasting services for the North American and China markets. ACT’s analytical services are used by all major North American truck and trailer manufacturers and their suppliers, as well as banking and investment companies.

More information can be found at www.actresearch.net.

 

 

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