If you look at the torque/power curve versus engine speed. Draw two vertical lines in your torque curve, the left line is the engine speed after shift, the right line is the max or shift speed. The deliverable power is the area under the power line and these 2 vertical lines. Then you can...
I believe everyone in this forum know that the usable area under the torque curve means deliverable power output.
Changing gear ratios, only happens in motorsport/race applications. How often a street car customer will do that?
Going back to the control, the point of varying engine volumetric...
The VNT3 actuator does have position feedback. And the actuation is by a continuos variable PWM signal. It does provide total close loop control.
If we are talking about race appications, we would have to go for max power output setup. Selecting gear ratios to pickup largest area under the...
LionelHutz,
I don't feel this is revolutionary. This is not even a big project at all. We already know how other people did it. Its a matter of cost and maintenance issue on these setups. If you never setup one, you will never know. Tell people to go off have no contribution. So far, only a few...
I am an engineer. Yes or no related to its work related or not. Our boss focus in trade/sales, wouldn't want to invest in development work. So I am doing this on my own now. Hopefully, I can come down a solution that is not too expensive so that the result can be commercialized. Or it will be a...
Ian,
It will be nothing easy. the process is the same. For V12, it will be more expensive, your cam, crank will be longer and require more machining work . The larger than engine, the stronger the need for the crankcase and more difficulty in tolerance control.
It looks like if everything is done in electronics, it will be a much simpler setup. Some vacuum actuated system has a reservoir using a one way valve, it accumulates vacuum for future use in partial throttle conditions.
However, if you can go for electronics, its much more simple and can have...
Yes or no. I work with a company in auto parts business, carry lots of brand names, HKS, Apexi, K&N... Project initiation is totally on my own, but I have access to company related resources, a full line up of GTR's, from R32 to R35, Porsche/VW/Audi cars etc.
It looks like setting up the...
I never mention it is simple. If it was, then I don't have to post this out and do this on my own, or spending so much time and effort to find related material.
I am from a Mechatronics engineering background, where computer controlled machinary is my main expertise . Vane control is not an...
Warpspeed,
I am not saying I can do better. I am still focusing on the technical issues of VNT setup in gasoline. I know many people tried it. Even some videos in youtube demonstrate some VNT in gasoline applications. What are the reasons behind it is not widely used? Nissan and Garrett don't...
What you are talking about is the volumetric efficiency (VE) of the engine due to effect of SC. Whether it is compounding or pure SC, if the intake pressure is always higher than the exhaust, then should follow the cam profiles setup using in an SC system. There is a lot of reference about it...
As I promised, after having more indepth discussion with the related people who have experience with Garrett VNT in gasoline applications, the truth behind why factory not use Garrett VNT in gasoline is more concrete.
1. Control & Safety
Gasoline engines tend to have a higher rev range and...
You should read about the H1 V8. Its made of two Suzuki Hayabusa 1300 motocycle engines. The latest version of the Hayabusa makes 197hp inline-4, and V8 will make 394hp reving to 10krpm . See the
http://www.h1v8.com/ website. It contains lots of information and building process of the engine...
