ebd CAD Services:
 
Engineered By Design can provide CAD design work to meet your specific customer requirements. Using the latest 3D Parametric CAD software we can design components and assemblies to suit your needs.

Not only can we produce CAD models but we can take ideas from concept to a realised part. With our experience in rapid prototyping we can produce sample parts on request to demonstrate how the finalised design will look.

Naturally we can also provide full engineering 2D drawings for manufacture if required and also assembly schematics.

Cad Data

 

Engine Design Godden Engineering grasstrack motorcycle engine

Full Engine

The last major project that we undertook was to design and develop a single cylinder motor cycle engine for racing. The work was undertaken for the manufacturer of the engine with a view to improving performance and reducing weight. At the outset this was a tough challenge, however now the engine produces approximately 63 BHP – doesn’t sound like a lot, but if this were put into car terms this would be a normally aspirated 2 litre engine producing 250 BHP straight from the crate and weighing less than 30 kilograms. Not bad I think you’ll find.
 
Case Study 1: Grass Track Bike Engine
We were asked to help develop a new engine for grass track and speedway racing. Our client is intending to cast these parts in magnesium alloy, however for the initial design it was intended that one was to be machined from solid. However, the part has been designed to enable both routes for manufacture to be used.
Godden Pump Housing Pump Housing Back
 
Shown above are a couple of stills from this development for the casing. (click for a larger view)
Engine Barrel:
 
Another component for this project was the barrel for the engine. In addition to the part design - thermal and stress analysis was conducted on this CAD model to ensure no deformation of the bore under normal operating conditions.
 

Barrel    Barrel 1   

The work was undertaken for the manufacturer of the engine with a view to improving performance and reducing weight. At the outset this was a tough challenge, however now the engine produces approximately 63 BHP – doesn’t sound like a lot, but if this were put into car terms this would be a normally aspirated 2 litre engine producing 250 BHP straight from the crate and weighing less than 30 kilograms. Not bad I think you’ll find!

 
 
Case Study 2: Finite Element Alnalysis of Rocker For the PPP-106
 

FEA Was Carried out on Rocker to determine the best way to re-shape the Rockers:

STD Rocker FEA Peugeot 106 Rocker FEA Animation
  Rocker FEA Mesh

One of the commonly accepted misconceptions regarding upgrading the valve opening rockers from standard is to replace seemingly lightweight aluminium "bad castings" with cast iron items. The comcept is to improve their strength & rpm handling characteristics. This is an inherantly wrong idea. What this means is that, the ebd way to improve the performance of items that go though a cyclical loading & unloading, such as a rocker, is not to increase the mass exponentially by indiscriminately changing the material to a much more dense & brittle item. Doing this just ends up in increasing load applied to the valve train, (and small amounts of power sapped from the engine plus decreased response time from the engine). The very first thing to do is analyse what the standard items are actually capable of, and what can be done with them...

As such, this study was undertaken to see what could be done with the standard items. All preconceptions removed - something which can be very difficult for people to do when every engine tuner points them in a certain direction, "just becasue that is what everyone does"...

Removing ourselves from this shows that from the analysis video shown below, what we achieved was a quite time consuming development of the standard items, that actually meant we reduced the mass of each rocker by over 5 grams. This sounds like a small amount, but by removing the material in the correct places, and blending the inherent stress raisers in the design, we increased the reliable stress loading & rpm handing by nearly 12.5%... More than enough to handle the designed for rpm or the PPP-106 project, - 8500rpm.

 
Shown above is the deflection analysis based on the spring rate of the CATCAMS Single Valve Springs PAC-S10011. Theese springs have a spring rate & charcteristics as shown below:
 
 

PAC-S10011

 
length
load
 
free length [ Lf ] : 44.7mm   42mm 18kg Valve Spring
block length [ Ls ] : 22.2mm 41mm 22kg
outer diameter [ De ] : 28.4mm 40mm 26kg
inner diameter [ Di ] : 20.2mm 39mm 31kg
wire diameter [ dw ] : 4.11mm 38mm 35kg
Springs
37mm 40kg
36mm 44kg
35mm 49kg
34mm 54kg
33mm 59kg
32mm 64kg
31mm 69kg
30mm 74kg
29mm 79kg
28mm 84kg
27mm 89kg
26mm 95kg
25mm 100kg
 
3D PDFs for you to play with:

This is from the CAD models generated for the PPP-106 project, specifically for the manifold & Throttle body fitment, which can be found here: Carbon Fibre

Use the mouse in the window to control the 3D scene

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