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Showcasing The Intake

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Name: Peter Cochran
Subteam: Powertrain
Part: Engine Intake Manifold System

The maximum power that can be produced by a Formula Student vehicle is limited by imposing the use of an intake restrictor in the intake system.  This restrictor then forces teams to design and manufacture a custom, purpose-built intake manifold.

UGR-19 features a Honda CBR600RR engine, the main aim of the intake system designed for a spark ignition engine like our own is to optimise the delivery of air from the atmosphere to the engine’s inlet ports.  The mass of air entering the combustion chamber should be maximised, and the delivery of air must occur in a predictable manner, to give the driver confidence in the car and the throttle response.

The driving force in the system is the internal pressure generated by the suction stroke of the four stroke cycle.  This negative pressure causes high repetitive loading on the component, and so the manifold must be strong enough to withstand this loading over large periods of time.  The manifold can also become quite hot and will experience some exposure to fuel, therefore any chosen material must have excellent resistance to both heat and petrol. As with all parts of UGR19, the total weight of the system must be minimised with a defined factor of safety.

UGR-19 features a 3D printed intake system made with carbon filled nylon, this is the team’s first intake manifold to be 3D printed, and replaces the previous aluminium system. This switch results in an impressive weight reduction of 1.2kg in the intake system alone.  This weight saving was helped by the ability to print the runners and plenum as one part, reducing the need for fasteners and seals.
The design was first evaluated using CFD so as to analyse the air flow through the plenum and into the runners, from this the design can be changed to optimise the flow rate. Many configurations were tested this way before the final design was settled on.  The final design features a plenum of volume 1.5 litres with raised bellmouths and a domed base.  The bellmouths are arranged in a square profile so as to help with the even distribution of air between cylinders.  When the four bellmouths are arranged linearly, as in UGR18, it is often found that the outer two cylinders experience reduced air low relative to the inside two.
After the design was finalised in CFD, the structural aspects of the component can be considered using FEA, the component must be strong enough to hold a vacuum, but also be able to withstand the high pressures due to any engine backfires.

With the addition of this new intake manifold, and various other powertrain improvements, we have been able to boost the power output of the car, to a maximum of 72bhp at the wheels!

Testing at Kames

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Today UGR-19 is running on her first racetrack: Kames Motorsport Circuit in East Ayrshire. The goal for the team is to get some testing miles on the car and for our drivers as well.

With the weather staying perfect throughout the session, we managed to practice skid-pad and obtain some telemetry data from the track so that adjustments to the car setup could be made for future testing and the upcoming FSUK competition!

Head over to our Instagram to watch some videos of the day!

Testing at University: 2

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This evening we managed some more wet weather testing with UGR-19! Our Head of Powertrain, Peter, drove for the first time, and crowds of tourists stopped to cheer him on.

After the session, a very happy Peter said “The car is incredibly quick! Really nice to steer and control, very responsive. It’s a shame it rained as it was quite slippery, but that’s Scotland for you!”

Tomorrow we are heading to Kames Circuit for the first of three consecutive full-day sessions we have planned. Hopefully the rain holds up!

Testing at University: 1

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Today we got UGR-19 out for her first test session at the back of the University! After a few wee electronic bugs and plenty of rain, our Head Engineer Kester was first in. Unfortunately, the session was red flagged by an especially large shower, but the team was still absolutely delighted to see the car run (as well as being pretty soggy).

Kester said “The engine is much smoother, the steering is much sharper, and it’s much quicker! Can’t wait to get back in…”

The team has an intensive testing schedule planned for UGR-19, so stay tuned for regular updates!

Showcasing the Uprights

A slightly different showcasing post today: it’s a video!

Our Head of Unsprung Mass, Cara Mackay, presented her Uprights design to the team earlier this year. Cara designed the Uprights as her final year project, and come September she will be working for Rolls Royce!

A massive thank you to Tannlin, who manufactured the Uprights for the team.

Find the video at: