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Technical Paper
Ernst Gohring, Egon-Christian von Glasner
An alternative to the current drum brakes, with the increased requirements of todays daily service are disc brakes, in that they offer, in contrast to the drum brakes, the following technical advantages and in turn enhance the active safety of modern commercial vehicles when braking: Enhanced brake pedal-feedback and actuation Improved efficiency Little performance losses when high thermal loads occur (fading). In order to be able to determine the improvement potential of disc brakes they will be compared to the commonly employed Simplex drum brakes. Both wheel brake systems (disc-/drum brakes and all variations) were tested on a computer controlled brake dynamometer and in field tests using a heavy duty commercial vehicle (class 8). The results are compared and conclusions drawn regarding “advantages/disadvantages”.
Although it is the smallest Unimog, Mercedes-Benz claims that the U 20 it is just as capable as the larger models, sharing familiar features such as permanent all-wheel drive, single tires front and rear, differential locks, portal axles to maximize ground clearance, coil springs, power take-offs, and onboard dual-circuit common hydraulics. Standard equipment also includes an air-conditioned cab.
Combine Mercedes-Benz experience with fuel-cell buses to date with the hybrid drive elements of the diesel-electric Citaro G BlueTec serial hybrid bus and what is the result? The prototype Citaro fuel-cell hybrid bus, shown at the recent UITP Congress (the World Congress of the International Association of Public Transport) in Vienna.
Mercedes-Benz has introduced a number of modifications to the Econic low-entry cab truck range for the 2010 model year. These include diesel models certified to European Enhanced Environmentally Friendly Vehicle (EEV) standards, new occupant safety equipment, and chassis and axle enhancements.
Vehicles on urban delivery and collection routes and buses are perhaps some of the more obvious beneficiaries of hybrid power systems, where the continual stop/start driving cycles offer many opportunities to recover and recycle braking energy.
Drivers on Germany's Autobahn near Stuttgart have been witnessing the dawn of a new era in trucking. They're seeing a tractor-trailer rig operating on an automated basis. In this episode of SAE Eye on Engineering, Senior Editor Lindsay Brooke looks at the new Mercedes Actros. 
Despite the greater efficiencies of engine brake designs, increasing gross weights, lower rolling resistance, and engine downsizing have driven the need for more auxiliary braking power on heavy trucks and buses. Jacobs Vehicle Systems' response is the High Power Density (HPD) engine brake.
Daimler Trucks will display its Mercedes-Benz Urban eTruck concept, claimed to be the first-ever battery-electric 26-tonne gross weight commercial truck, at the IAA Commercial Vehicles show in Hanover, Germany.
Daimler Trucks North America has referred to its $40 million, five-year SuperTruck program that concluded earlier this year as “a playground for our engineers.” Overseeing this playground’s development and integration activities was Derek Rotz, the Principal Investigator who was hired in 2010 when the program kicked off. He spoke with SAE Magazines about the challenges, lessons learned, and their ongoing work.
With the large commercial van market continuing to grow, Mercedes-Benz continues to improve its Sprinter van to keep it the “best” in a crowded field.
Given the worldwide desire to reduce road accident fatalities, it seems likely that the first applications of autonomous driving technologies will appear on heavy commercial vehicles. Daimler recently demonstrated how it could develop such technologies in its Mercedes-Benz Future Truck 2025 study, which will make its global debut at the IAA International Commercial Vehicle Show at Hanover in September.
A new standard engine, interior upgrades, and optional safety technologies highlight the latest version of the Mercedes-Benz commercial van.
The truck maker has announced the first intelligent axle that actively controls oil regulation inside the unit, which boosts fuel economy by up to 0.5%.
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