| Author | Message | ||
     M1combat |
We have a butterfly valve that is actuated by a "servo"... Can that servo be programmed/modified to operate a velocity stack that will change it's length to suit the RPM's? Is there enough of a performance gain with a system like this (theoretically) to make it worth doing? I don't remember who posted the original idea (If it's at all original). Maybe Fullpower? I just thought it may be a good topic for another thread. | ||
| Fullpower |
here's another idea for the servo motor: why not use it to adjust a speed sensitive suspension damping, or a steering damper? | ||
| Glitch |
I saw a show the other day where a guy took the shocks off a Hummer and replaced the oil with an oil/iron mix. So when the Hummer hit a hole the shock would sense it and magnitize and stiffen the shock in an instant. Cool stuff, can't remember the show though, think it was on the Discovery channel though. M1 sounds like it may work, but it seems like (to me) there would be too many moving parts. | ||
| M1combat |
No more than there are now... You would just be moving one of them to the intake instead of the exhaust. I would imagine that if you ran it off the tach you could get a signal that was easy enough to manipulate into an input for the servo motor... Is there even enough theoretical benefit to a system like this to even try? Fullpower, I wouldn't mind speed sensitive damping really, but steering damping I think I would always want constant so it never surprises me. I don't have much skill yet though, so that's just me. | ||
| Hootowl |
Glitch, I saw the same show. It is a new series, don't remember the name of it either. The demo of the iron/oil mixture hardening like a rock when they threw the switch was particularly impressive. I wonder if the price will ever come down enough to put it in real vehicles? | ||
| Darthane |
M1, Glitch has got a point - while there would still be the same number of moving parts, the parts involved would be considerably more complex, since the intake tract needs to be sealed while the exhaust valve does not. I'm no expert, but I doubt there would be enough of a gain to make something like this worthwhile. Would be a very cool project, though, if you could stand being apart from riding for that long. I would wager that the exhaust valve is already driven via RPM signals, it's just a matter of mapping the servo movement according to how you want it depending on the engine speed. | ||
| M1combat |
I am fairly certain that it is driven by RPM signals, but modified by TPS. I see your point about the need for it to be sealed though... I would imagine that a simple o-ring with the proper lubrication would suffice. Maybe teflon lubrication? I don't know. I do know however, that I indeed would NOT be able to part with riding long enough to design the system  . | ||
| Ftd |
I believe the show was "Rides" on The Learning Channel (Tuesday's @ 9EST). Rod Millen (a famous off road racer) has a co. that modifies vehicles. The show was about him swapping a V-8 from a big Lexus into a smaller one. Corvettes have had those shocks for a while now. The viscosity of the metal containing fluid changes with electrical current thus the suspension tunes itself on-the fly. edited by ftd on February 10, 2004 | ||
| Ftd |
Magnetic Ride Control New on the Corvette for 2003, Magnetic Selective Ride Control uses a revolutionary damper design that controls wheel and body motion with Magneto-Rheological fluid in the shocks and struts. By controlling the current to an electromagnetic coil inside the piston of the damper, the MR fluid’s consistency can be changed, resulting in continuously variable real time damping. As a result, drivers feel a greater sense of security, a quieter, flatter ride and more precise, responsive handling, particularly during sudden, high-speed maneuvers. The system isolates and smoothes the action of each tire, resulting in less bouncing, vibration and noise. On bumpy or slick surfaces, the system integrates with traction control to assure maximum stability. It also works with ABS to keep the vehicle balanced and poised. It is the only system without electro-mechanical valves and no small moving parts. It consists of a MR fluid-based monotube struts, monotube shock absorbers, a sensor set and on-board controller. Magnetic Selective Ride Control is available on Corvette coupe and convertible models for 2003. | ||
| Static |
Just in case anyone still cares, a servo in a single runner intake tract- one runner to each cylinder- may simply cause a loss of air- on a carbed motor this would be like the choke. Yes it is a statement of the obvious, but what happens when you put your hand over a throttle body. The systems that currently work w/ a servo motor on the intake side are either dual runner- switching to shorter runner at higher rpm- or dual to single plenum like chrysler's 3.5l v-6 for example. |
