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Delivering the world’s most powerful diesel engine

A heritage of innovation

JCB, one of the world’s leading construction equipment manufacturers, has a long heritage of supplying innovative products. To power its construction vehicles, the company had traditionally relied on sourcing diesel engines manufactured by third party engine suppliers. However, in its ongoing quest to further increase customer satisfaction, the company made the decision to develop its own engines, exclusively designed to suit the specific requirements of its construction products.

The challenge of innovating in a new area

While having previously built prototype diesel engines, it was a bold move for JCB to start production of its own engines. For the company to maintain the continued trust of its customers and to command the respect of the industry, it needed to ensure that any move into engine production was a complete success, from the introduction of its very first engine.

With this in mind,the company initiated an extensive new product development process, starting with a detailed feasibility study that incorporated concept design, testing and manufacturing planning. From the outset JCB worked in close co-operation with a chosen group of partners and probable suppliers, including technology partner, Ricardo Consulting Engineers.

A tried and tested product development platform

For over 17, years JCB’s long term product development strategy relied on Siemens’ NX digital product development system. As a tried and tested platform familiar to the company’s design engineers, it made sense that NX would be the software chosen to drive the development of its diesel engines.

NX supported the creation of the initial concept designs for JCB’s first engine, the JCB444 and enabled the development team to take their early ideas through the rigorous virtual and physical testing process to produce the finished complex 3D model. Data from the NX solid model was used to manufacture final components and facilitate a successful first launch.

Advanced assembly supports simultaneous working

During the initial feasibility study and the subsequent product development phase, between ten and twenty design engineers from JCB and Ricardo were working on the JCB444 project at any one time. This process was facilitated by NX advanced assembly techniques as Alan Tolley, JCB’s director of Engine Programs, explains, “From the outset, NX enabled us to incorporate all the components making up the eventual 3D model of the engine into a single assembly file that everybody on the development team worked within. We were all working in context. Changes made to an individual part design by one engineer would be visible to every other engineer, helping to ensure that the interrelated parts would ultimately fit together.

Predictive techniques enhance accuracy

Predictive techniques and simulations were heavily used throughout the process to enhance accuracy, reduce the need for rework, optimize resources and support the problem-free introduction of the engine.

NX 3D animation sequences enabled the design engineers to analyze the complex motion of the moving engine parts and ensure that individual components would not interfere with each other.

The integrity and accuracy of the NX 3D data was crucial to the simulation and virtual testing stages for which it was used in a variety of specialist software packages.This included tools to simulate the forces on different parts of the engine and computational fluid dynamics (CFD) to replicate the flow of fluids through the cylinder head and cooling system.

To help assess the ways in which the engine they were developing would eventually be housed within JCB’s range of construction vehicles, the design engineers conducted a series of virtual tests in which solid models of the engine were virtually implanted into 3D representations of the construction products.

NX helped to speed progress to the next stage in the product development process – physical trials that involved testing the real world performance of prototype engines in the construction vehicles. JCB’s component suppliers and specialist prototype manufacturers used the NX  3D data directly in their CNC machining and laser-based prototype machines to manufacture prototype parts. Again the integrity of the data played an important part as it reduced the requirement for supplementary 2D designs or any rework

Parametric features facilitate fast editing

Each phase of virtual and real world testing produced refinements and iterations that NX parametric facilities enabled the design engineers to quickly apply to the 3D model. Edits made to individual components automatically generated corresponding changes to any interrelated parts because NX linked the different elements of the design. This supported the gradual evolution of the engine as the development process progressed towards manufacture of parts and assembly.

Ground-breaking equipment successfully launched

The JCB444 engine was introduced in 2004. JCB’s meticulous planning and comprehensive development process resulted in a truly ground-breaking product. The JCB444 now is world’s most powerful automotive diesel engine per liter.

NX is acknowledged to have made a significant contribution in supporting JCB’s successful move into diesel engines. Alan Tolley explains, “With the JCB444 we set out to create an innovative diesel engine that was purpose-built to power our construction equipment. This was our first move into diesel engine manufacture and there was necessarily immense pressure to ensure a successful launch. Customers and the industry at large were watching. We had to get it right first time.

NX played a significant part in our eventual success. Its advanced assembly features allowed us to keep up to twenty engineers working simultaneously on the project. The integrity and accuracy of the NX data was something we relied on heavily throughout the development phases, while the software’s ‘parameterization’ facilities afforded the flexibility to work in an iterative way, making rapid edits as the product evolved.

NX software supported us in our goal of bringing an innovative high-performing engine to market without undue delays or extended re-work.

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