Report: Climate Change a Potential “Threat Multiplier” for European Security and Foreign Policy
Toyota to Build New 1.3L Engine in Wales

Volvo CE Unveils Hybrid Wheel Loader

L220fhyb
The hybrid powertrain in the Volvo L220F Hybrid. Click to enlarge.

Volvo Construction Equipment (Volvo CE) unveiled a pre-production prototype of its L220F Hybrid wheel loader at the CONEXPO-CON/AGG exhibition, 11-15 March 2008 in Las Vegas. The L220F Hybrid offers more power, better performance and a 10% reduction in fuel consumption, according to Volvo.

Leveraging its position as the world’s largest manufacturer of heavy-duty diesel engines in the 9 to 18-liter class, the Volvo L220F Hybrid’s parallel mild-hybrid technology has been developed within the Volvo Group and uses the D12 engine as its platform.

L220hyb2
The L220F Hybrid.

While much of the technology remains confidential, subject to patents pending, the heart of the hybrid system is an ISG—Integrated Starter Generator. Fitted between the engine and the transmission, the ISG is coupled to an advanced battery.

Up to 40% of a wheel loader’s time can be spent with the engine idling. The ISG allows the diesel engine to be turned off when stationary and then almost instantly restarted by rapidly spinning the engine up to optimum working speed using the high power battery.

The ISG can also overcome the problem of low torque at low engine speeds by automatically offering a massive electric torque boost—the ISG’s 50 kW electric motor offers torque of up to 700 Nm (516 lb-ft) from standstill.

The combination of these two attributes of the ISG mean that the diesel engine will remain off for long periods when it would otherwise be idling and that the operator does not need to over-rev the engine in order to get sufficient torque to work, as peak torque will be offered at almost tick-over engine speeds. The battery is then replenished automatically without reducing productivity, with the ISG acting as a dynamo/alternator.

While the ISG is the heart of the system, there are other energy saving innovations in the L220F Hybrid, such an electrically powered climate control system (rather than being powered directly by the engine).

The Volvo L220F Hybrid will be Volvo’s—and probably the industry’s—first commercially available wheel loader when deliveries begin in late 2009.

In late 2007, Volvo Technology Transfer AB became a part-owner in El-forest AB, based in Örnsköldsvik, Sweden, and is thereby investing in the development of energy efficient and environmentally sound forestry machinery. The El-forest forwarder is the world’s first forestry machine that uses hybrid-electric technology. The hybrid forwarder uses a series hybrid architecture, with the genset powered by a small diesel. The forwarder is moved by 23 kW traction motors in each wheel. Fuel consumption can be cut by up to 50% compared to conventional forwarders. (Earlier post.)

Comments

Denny

Sounds like a good step forward. It is good to see the technology being developed to a diversified market.

On a side note "...the development of energy efficiant and ENVIRONMENTALLY sound FORESTRY machinery" sounds like and oxymoron.

John Taylor

With the equipment mfg now also being the equipment operator, there is a far greater motivation to save money.

I hope they also realize that "green forestry" involves growing more trees than are cut, not just operating a less polluting loader.

richard schumacher

Can we get a larger phantom image? The one now posted has unreadably-small text.

richard schumacher

Tree farming is helpful in that it removes CO2 from the atmosphere. It is good to be reminded that *all* farms, however attractive some of them may appear to the eye, are machines for collecting Solar energy and are not at all natural.

Rafael Seidl

@ Denny -

Canada and Sweden have a growing inventory of softwood forests, i.e. they are planting more trees than they are cutting down. I expect the same is true of Russia, Finland and Chile.

Well-managed forests also tend to be less susceptible to fire, because the logging companies have an incentive to clear the undergrowth and maintain wide fire breaks. Crown fires that jump these breaks are rare because trees near them are not allowed to grow tall enough to present a risk.

Making logging equipment more fuel-efficient reduces the number of trees a company has to cut down to turn a profit. The next step should be replacing the increasingly expensive petroleum diesel fuel with compressed SNG, which can be produced from sawmill waste via gasification at intermediate temperatures. The co-products CO and H2 can be converted using catalytic methanation. Various methods exist for scrubbing H2S and water vapor out of SNG.

Provided there is a small gasoline tank for starting up, NG vehicles are much less problematic in winter than diesels, potentially permitting year-round logging operations. Equipped with a three-way catalyst, such vehicles also emit far less pollution than diesels, something both the lumberjacks and the remaining trees will appreciate.

adds

Why they just not use new generation of steam engine.
It will offer very clean alternative to diesel engine. No idle cycle, and very high torque from start, with similar or better efficiency then diesel engine.
The latest steam engines have all the qualities of electric motors with out all the efficiency. And the cost is comparable to diesel engine and much lower then cost then hybrid configuration.

The automotive industry have to open to solution that not exactly reflect there traditional approach where the most complicate and expensive solution is chooser - see the Toyota Pirus

adds

Why they just not use new generation of steam engine.
It will offer very clean alternative to diesel engine. No idle cycle, and very high torque from start, with similar or better efficiency then diesel engine.
The latest steam engines have all the qualities of electric motors with out all the efficiency. And the cost is comparable to diesel engine and much lower then cost then hybrid configuration.

The automotive industry have to open to solution that not exactly reflect there traditional approach where the most complicate and expensive solution is chooser - see the Toyota Pirus

joe padula

Sorry, even with reheat and supercritical pressures, small steam plants can not compete with diesel or NG in this size.
They can be used in a simple "bottoming cycle" using waste heat from the prime mover. Mass is not a big concern in this type of machine unlike a car and that is the only serious block from using it in large trucks. It can be overcome with engineering. The Stanley brothers or Dobble could handle it today...

Arnold

As long as these machines have work to do, the savings and knowledge acquired will be tremendous.
One of the most obviously beneficial on economic and performance candidates around.

Verify your Comment

Previewing your Comment

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

Working...
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.

Working...

Post a comment

Your Information

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