Taking It to Extremes
Successfully developing T4f compliant engines that meet all emission, quality, efficiency and reliability targets before the strict legislation comes into force has been one of the highest priorities for Volvo Construction Equipment’s Technology function since the regulations were announced five years ago. In fact, in terms of investment, it is the second largest development project in the whole of the Volvo Group’s history.
Advanced Volvo Technology
Behind the Scenes
Volvo CE holds its winter expeditions at the deepest point of winter in Kiruna, in the far north of Sweden, close to the Arctic Circle, where temperatures drop (and stay) well below -30°C. The cold climate testing was held at the Kiruna mine – the largest and most modern underground iron ore mine in the world. Here, a Volvo customer who operates at the production site incorporated the prototype machines into his fleet. This meant that not only could Volvo engineers collect data and monitor performance in a real life situation, but they were also able to understand how the new technology felt from the operator’s point of view. Other tests included repeating standard working cycles and cold start optimization.
“Facing freezing temperatures in cold climate testing is just one part of the development process – but it is an essential procedure in order to make sure the engine, exhaust-after-treatment and all the systems and sub-systems can handle these extreme winter temperatures,” says Mr. Guthammar.
“Taking it to the other extreme, in Spain we conducted tests on test tracks and monitored how the technology coped in the extreme heat and demanding applications,” continues Jan Guthammar. “For example, we looked at how a Stage IV/Tier 4 final articulated hauler reacted to being driven up a severely steep hill, with a full load, in the blistering heat. The machines were also tested at 3,500 m above sea level during high altitude tests in Les Deux Alpes, France.
Here, the air is thin and atmospheric pressure is low so we needed to test and verify machine performance, fuel consumption, engine response and startability in these rarefied conditions. When you operate at high altitudes – where there is much less oxygen in the air – it will obviously have a detrimental effect on all combustion engines as oxygen is key to the combustion cycle. However, the latest generation of Volvo machines will have improved performance in these difficult conditions – in fact, from both our internal results and from feedback from our customers who are currently operating these machines, we can see that the entire T4f range has improved performance, fuel efficiency and reliability.”
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