With the I-Shift, Volvo Trucks has turned the spotlight on the transmission on the international truck stage. Never before has a transmission received such a positive response from drivers and transport companies all over the world.
Today 60 per cent of all Volvo FH trucks are sold with I-Shift and it is standard in the world’s most powerful series production truck, the 700 hp Volvo FH16. Sven-Erik Tibb, chief project manager for the development of the I-Shift at Volvo Powertrain, tells the story behind the I-Shift….
“The I-Shift’s predecessor – Geartronic – was not an optimised solution and an automatic transmission was needed to enhance driver comfort and driving ease. At the same time, the development of electronic systems really took off at the end of the 1990s. More and more of these improved systems were used to control both the engine and the rest of the truck and this created new opportunities to develop an electronically controlled transmission.”
“The target was to produce a so-called ‘automated mechanical transmission’ (AMT) aimed at European long-distance and distribution vehicles with a maximum weight of 40 tonnes. The prerequisites were improved functionality, reliability; smooth gear-shifting and economical driving.”
“At the end of 1998, but, prior to that, we conducted an in-depth pre-study in which we discussed and analysed different concepts and technical solutions. We examined not only the technology but also production and the best total solution. So, when we started the project,
we knew what we were aiming for.”
“Firstly, to design a control system for the transmission; in other words, the system that was going to perform the gear-shifting in the form of electronics, valves, cylinders, sensors and the actual software. All of this then had to be combined with the mechanical systems. What’s more, the transmission had to be unsynchronised and this imposed unique demands on the design. We completed this assignment very successfully, but it was really hard work.”
“First and foremost, the pre-study, which laid the foundations for a successful start. In addition, many skilled people were involved in the project. During the three and a half years it took to complete the project, most of our department was involved and, at most, this comprised 30 people. More than 150,000 working hours were spent on the project.”
“It came at a later stage and it is Volvo Trucks’ name. There were a number of discussions about the name that should be given to the product, but we didn’t come up with the name. It was known as the P4200 when we were working on it. The name I-Shift is a combination of ‘I shift’, as in ‘I change gear’, and ‘intelligent’ shift.
“The first phase took place in 2002, when the most important developments were made to the centre of the transmission, with a new control system and basic gearbox. Stage two, which took place at the end of 2005, involved the development of the front end of the gearbox, including the clutch system. We also extended the applications for the I-Shift, by making it available for trucks with 16-litre engines and a higher maximum weight, for example. Developments are still taking place continuously, as we introduce new products.”
“It feels great and it’s really satisfying. People involved in product development spend a great deal of time solving problems and so it’s especially pleasing to see results. When a project is as long as this one, it takes several years before you see the results and receive feedback from drivers. So it’s fantastic to see how much appreciation our work has generated.”
“Well, I have to begin by pointing out that this is not simply my creation. It has been produced by the entire organisation. It is the result of tremendous teamwork and is definitely not the work of one person. All of us are incredibly proud when we see how good the I-Shift is. We are working the whole time to maintain our existing products in order to develop even better solutions in new projects.”
“It is already outstanding, but that doesn’t mean we can relax and sit back. We product developers never give up and adapting the I-Shift to more and more demanding driving is a constant challenge. What’s more, the competition spurs us on the whole time and there is always someone breathing down our necks.”
