Azure Dynamics to Focus on Four Core Hybrid Products
DaimlerChrysler Unveils New smart fortwo; Micro-Hybrid Version in 2007

Peterbilt to Introduce Medium-Duty Hybrid Truck for Fuel Savings of 30-40%

The hybrid Model 335.

Peterbilt, a division of PACCAR, will display a production-representative, hybrid-electric medium-duty truck—outfitted with a fully integrated bucket lift body—at the Hybrid Truck Users Forum (HTUF) National Meeting in San Diego next week.

The hybrid Model 335 is targeted for municipal and utility applications and will be in limited production in 2007.

There is increasingly strong demand for hybrid vehicles as customers recognize the bottom-line benefits of reduced fuel use and service requirements, as well as the civic impact of responsible environmental practices.

—Dan Sobic, Peterbilt General Manager and PACCAR Vice President

The hybrid Model 335 is powered by the new 6.7-liter PACCAR PX-6 diesel engine and a parallel hybrid system developed with Eaton Corporation. Peterbilt expects the hybrid model will result in a 30- to 40-percent reduction in fuel use through the combined improvement of on-road fuel economy and stationary jobsite operation.

The hybrid Model 335 on display at the HTUF meeting November 14 through 16 will be equipped with a Terex body and 55-foot aerial. Peterbilt and Terex have jointly developed the fully integrated chassis and body combination. The body was specially designed to allow for installation of the hybrid components on the chassis during manufacturing, allowing the vehicle to drive off the assembly using hybrid power. The design also allows for easy access to hybrid components for improved serviceability.

The truck and body communicate through a new J1939 digital controller. This interface senses hydraulic demand from the body and automatically engages the hybrid system. Under a full charge, the PTO (Power Take Off) can operate for approximately 25 minutes at which time the vehicle will automatically start the diesel engine and recharge the hybrid’s batteries. A full recharge takes 3 minutes. During eight hours of operation, the diesel engine will run for less than one hour, according to Peterbilt.

Hydraulic Hybrid. Also on display at the meeting will be a Peterbilt Model 320 featuring Hydraulic Launch Assist hybrid technology. (Earlier post.) The Class 8 vehicle is specifically designed for refuse applications and uses its kinetic energy to conserve fuel and assist in acceleration.

The Hydraulic Launch Assist technology was also developed in partnership with Eaton. The system is particularly beneficial in heavy stop-and-go applications, such as refuse collection. In addition to the enhanced fuel economy, brake wear can be reduced by more than 50 percent, improving serviceability requirements and reducing operating expenses.

Hydraulic Launch Assist works by recovering a portion of the energy normally lost as heat by the vehicle’s brakes in the form of pressurized hydraulic fluid. This fluid is stored in an on-board accumulator until the driver next accelerates the vehicle.

Stored energy launches the vehicle during the initial, high-fuel consumption start from stop, followed seamlessly by power from the primary engine. In performance mode, the stored energy is released and blended with engine power at launch. This can significantly improve acceleration due to the high power density of hydraulics.


fyi CO2

Good stuff! Question- is production limited by short component supply or low unit projected sales?


As with most new technology, models tend to have small runs aat first. If maarket validated (and no bugs), they then go full bore.


Under a full charge, the PTO (Power Take Off) can operate for approximately 25 minutes at which time the vehicle will automatically start the diesel engine and recharge the hybrid’s batteries. A full recharge takes 3 minutes.
so this PTO power is when the truck is stationary or moving?
regardless, this is great news. let's hope these guys become in high demand and we seem more of them on the roads.


Can you imagine the fuel savings of a hybrid garbage truck that stops at every driveway.

Rafael Seidl

Lensovet -

PTOs are used to drive external machinery such as a winch when the vehicle is stationary.


I can see this as a delivery truck, for potable water (bottled water), or soda/alcoholic drinks; 7-UP.


Wouldn't a series-hybrid be more appropriate for medium-duty?

shaun mann

but is it quieter?

many cities could be willing to mandate this sort of thing if it reduces trash-truck noise.


I bet they are quieter. When a truck starts from a stop, you can hear the engine rev up the torque converter and transmission are heavily loaded. With a air, hydraulic or electic assist, the drive train would not have to work as hard. I can remember seeing city busses or UPS trucks take off from a stop with a huge roar and plumes of black smoke coming out the tailpipes.

Kelly Robinson III

I am looking for a medium duty cargo truck (2-3 tons) with lift gate.

Verify your Comment

Previewing your Comment

This is only a preview. Your comment has not yet been posted.

Your comment could not be posted. Error type:
Your comment has been posted. Post another comment

The letters and numbers you entered did not match the image. Please try again.

As a final step before posting your comment, enter the letters and numbers you see in the image below. This prevents automated programs from posting comments.

Having trouble reading this image? View an alternate.


Post a comment

Your Information

(Name is required. Email address will not be displayed with the comment.)