Vehicle Development – Automotive Engineer

7 May 2015 | Author: | Comments Off on Vehicle Development – Automotive Engineer


Land Rover Defender

Rover has been producing its all-wheel drive model 1948

A midlife facelift is enough to squeeze six years a vehicle before the replacement is launched. So it’s remarkable Land Rover has been its original all-wheel drive since 1948 with so few

It’s regarded by many as the most capable off-road ever made. There’s a need for a basic, uncompromising but the luxury SUV market – pioneered by the Rover – is far more lucrative. And the of a ladder frame chassis the Defender’s makes development for emissions and safety laws harder.

“For Euro 6 you’re to such low levels of emissions we’d have to do a lot of re-engineering to the architecture,” says Gary chief programme engineer for the “When it gets to that say that you wouldn’t start this platform – so you have to at other things.”

Which is why the version will also be the A Euro 5 diesel engine and NVH levels are enough to keep it until its replacement – based on the concept – appears in 2015.

The 2.2-litre diesel, developed Ford’s Puma commercial engine, replaces the former unit. Output is the same but to the compression ratio, fuel and aftertreatment make it cleaner and Packaging the diesel particulate (DPF) meant changing of the footwell pressings but allowed it to be improving light-off times.

cycles are harsh, though – vehicles will not see the high-speed that typically purges of soot.

“Because we’ve got the DPF so close to the the gas temperatures we get in there mean the vehicle can run at much lower and for shorter periods during says Taylor. “We can do it at around so it should be durable. We’ve a lot of work on oil dilution to understand the implications of that.”

Revising the commonrail system, supplied by and adding an acoustic engine reduces NVH considerably. Improving gaps and applying sealant the body goes through the shop contributes to lower noise levels.

Apart from these the vehicle is much as it was. has been the approach for years: only what’s necessary for Most consumers like the the way it is.

Margins are lower than on the Rover Discovery. It’s to recover investment on a vehicle in volumes of around 20,000 and many variants.

The DC100 or programme 660 as it will be known in development, has been shown in two but consumers who bought Defenders may a wider choice. That be difficult if the new vehicle’s built a monocoque platform. Land must also decide target attributes to go for.

That’s not much of an issue for the because it’s really an you can drive on the road when you to. The reason it’s so good in conditions is the basic architecture, delivers lots of ground and axle articulation.

“You argue it’s compromised for capability because it was designed for with centrally mounted suspension,” says Taylor. “If you to design a car that was going to more optimally you probably go in that direction.”

Most Defenders come in two 2,360mm and 2,794mm, or 90 and 110 as they’re – it’s the dimension in inches. says that Land research shows that is the optimum to get the best approach and angles. At 2,574mm, the DC100 this almost exactly.

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