Price of perfection
With the deadline for Euro 6 clean engines getting closer, operators need to understand the technology, cost and maintenance implications before it's too late. Brian Tinham reports
Next generation engines
Just when you thought it might be safe to forget heavy-duty engine emissions regulations, Brussels starts getting serious about ‘Euro 7’ – and not just for CO2 reduction. Brian Tinham reports
New approaches to low-temperature NOx aftertreatment
Controlling NOx emissions at low exhaust temperatures while avoiding choking the SCR system with AdBlue deposits is the latest challenge facing diesel engineers. Richard Simpson describes two possible solutions
IAA review: Cummins doubles up
With tougher emissions targets ahead for diesel engines, Cummins used IAA to introduce an updated turbocharger and new two-stage aftertreatment system, reports Kevin Swallow
Less is more
Truck manufacturers facing increasingly strict CO2 rules are aiming to reach the new targets through a thousand small tweaks, rather than focusing on a few big changes to their engine designs, finds Steve Banner
Euro 6 of the best
The upcoming introduction of Euro 6 engine emissions legislation is prompting a growing number of truck and bus engine manufacturers to unveil their solutions. Brian Tinham and John Challen investigates latest offerings from Mercedes-Benz, Cummins and DAF
Best of bus
Bus and coach maintenance technicians from across the UK and Ireland competed in the seventh annual IRTE Skills Challenge, tracing faults, fixing problems and answering questions. Will Dalrymple was there
Blue-flame trucks
Gas-powered engines are hardly new – some of the very first internal combustion engines were gas-fuelled – but it is only now, with emissions all-important, that natural gas is becoming a viable alternative to diesel power. But what technology will these engines use, and are they likely to take over soon, asks Toby Clark
A particular issue: cleaning DPFs
With diesel emissions under ever-closer scrutiny, the maintenance of particulate filters has become a key issue for fleet engineers. Richard Simpson investigates
Bus and coach conversions: air cleaner
Go-Ahead has developed, and is now trialling, what may be the first prototype of a filter for urban air. Will Dalrymple reports