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Old May 20th, 2017, 12:04   #181
Join Date: Jul 2016
Location: Vancouver
TDI(s): PD wagon

Thank you Brian for the non stop knowledge and real world experience.

Speaking of high pressure fuel pump failures and soft camshafts... how about that freevalve tech progression?


Qoros, a Chinese manufacturer, is currently testing a camless motor in their 3-hatchback. Traditionally it's a port injected 1.6T 16V with 160HP/175lb-ft. Koenigsegg is claiming a ~45% power and torque increase, 15% fuel economy, and 35% fewer emissions (mostly due to cold start improvements). They currently have 150K/yr production and are well underway testing this system. Many companies have looked into this extensively but other than fiat we haven't really seen much in terms of weird valve designs in mass produced vehicles.

The valves can be controlled individually and infinitely, it has 8 inlet and 8 exhaust port.
- No need for a wastegate as 4 exhaust outlets don't enter the turbo, so those four valves can be opened more as needed
- No need for a throttle body
- No need for a cam/HPFP assembly
- The pre-cat converter can be removed, since the exhaust can be heated much faster and most pollution occurs during cold starts
- The entire engine assembly is approx 15kg lighter, 50mm shorter, 70mm shorter and narrower in this application.
- You could probably run a single drive belt
- Square valve profile race use
- Raised CR from 9 to 12:1
motors don't need to get any smaller, they need to get smarter first. Part of that is with simplicity, HPFP failures cost more than a mk4 tdi typically and walnut blasting isn't fun. Twin injection is a good start. Hopefully this will get a running shot against those dull hybrids. With VGTs and plasma ignition this should see 50+MPG easily, just a matter of getting the price down.

Dealers - malonetuning.com/dealers
We made a free VCDS Log Viewer!

Last edited by Owain@malonetuning; May 21st, 2017 at 02:03.
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