special motors, patents, fuel consumption reductionRenault Modus 1.4 16v, strange box on the intake air intake?

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Christophe
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Renault Modus 1.4 16v, strange box on the intake air intake?

Unread Messageby Christophe » 18/02/20, 19:24

Considering this strange box (??) on a 2006 Renault Modus Essence 1.4 16v model (therefore not brand new as a car) ... but what is this box for on the air intake (upstream of the air filter) ? : Shock: : Shock: : Shock:

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Re: Renault Modus 1.4 16v, strange box on the intake air intake?

Unread Messageby GuyGadebois » 18/02/20, 19:32

Isn't that a quiet box?
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Re: Renault Modus 1.4 16v, strange box on the intake air intake?

Unread Messageby Christophe » 18/02/20, 20:17

Uh, I don't really know ... do you want to develop?

This box is bypassed from the conduit ... there is no partition between the 2 holes on the main air intake (= the entire air flow does not pass through this box or very little ...)

A still is supposed to be (at the level of) the air box and especially on the entire air flow ... right?

I briefly knew the recovery lungs on 2 times ... This is what this box reminds me the most ... (damping of air shocks and recovery of loss of mixture by admission ...) but by far because we are far from a 2-stroke engine ...

Subsidiary question: why are there slots before this box on the main pipe?
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Re: Renault Modus 1.4 16v, strange box on the intake air intake?

Unread Messageby Christophe » 19/02/20, 11:19

Well then the engine manufacturers? No idea? : Idea: : Idea: : Idea:
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Re: Renault Modus 1.4 16v, strange box on the intake air intake?

Unread Messageby Flytox » 19/02/20, 11:45

It is very similar to an intake resonator which plays on the pressure waves in the intake ducts to attenuate a certain frequency of the kind unpleasant for the occupants of the car, or on the contrary to phase the pressure with the engine cycles to increase torque, performance etc ...

Tap "intake resonator" and you'll see it's relatively common.

https://fr.wikipedia.org/wiki/R%C3%A9sonance_de_Helmholtz

Automobile

Helmholtz resonance can be used to improve the air filling of internal combustion engines. Engine designers can exploit the resonance of the system formed by the intake manifolds and the intake manifold. Around an engine speed chosen by the designer, the opening-closing cycle of the intake valve and the periodic suction which follows will excite the resonance so that the overpressure in the combustion chamber occurs at the moment closing the intake valve. Thus, by working the geometry of the intake pipes (length, diameter) or by introducing a resonance plenum specially designed for this purpose in the intake line, it is possible to improve the volumetric efficiency of an engine with low speed.
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Re: Renault Modus 1.4 16v, strange box on the intake air intake?

Unread Messageby Flytox » 19/02/20, 11:55

On a motorcycle Yamaha called it "YEIS".

http://www.yamaha-community.fr/yeis-1980

YEIS (1980)


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The Yamaha Intake Energy Control System (YEIS) performs the same function on two-stroke engines as the YICS system for their four-stroke counterparts.
Again, the device is simple: it only consists of a storage chamber placed in bypass on the intake pipe. When the engine is in its exhaust phase with the intake valves closed, the fuel mixture is directed to the storage chamber. When the engine reaches its intake phase, the valves open under the effect of the pressure change in the crankcase and the reserve mixture is then sucked in along with the main flow from the carburetor. The YEIS thus very simply regulates the flow of the mixture while in the normal cycle, of the 'all or nothing' type, the fuel mixture collides with the valves closed in the exhaust phase with the turbulence that this implies, then is admitted suddenly in the housing.
This gas flow situation due to YEIS leads to an increase in engine torque and compared to a conventional two-stroke, allows equal power with a smaller carburetor diameter. More power for less fuel consumption, this is essentially what the YEIS promises, introduced in 1980 on all-terrain motorcycles YZ250 and IT200 before it won many other models in the range, such as the Mate V50 moped.
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Re: Renault Modus 1.4 16v, strange box on the intake air intake?

Unread Messageby GuyGadebois » 19/02/20, 12:05

It is indeed a stilling chamber, aka intake resonator.
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Re: Renault Modus 1.4 16v, strange box on the intake air intake?

Unread Messageby Christophe » 19/02/20, 12:15

Ah here we come: we are therefore on an equivalent of "lung" of 2-stroke engine (this is exactly the YEIS system that you presented that I had in mind and on my last mob it was flexible)!

A Helmholtz resonator therefore has a similar function (to a lesser extent) to a trigger on a 2-stroke engine!

Thanks Flytox!
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Re: Renault Modus 1.4 16v, strange box on the intake air intake?

Unread Messageby Christophe » 19/02/20, 12:15

GuyGadebois wrote:It is indeed a stilling chamber, aka intake resonator.


Well no it has nothing to do with it! Do not try to be right on this one! : Cheesy:
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Re: Renault Modus 1.4 16v, strange box on the intake air intake?

Unread Messageby GuyGadebois » 19/02/20, 12:17

Christophe wrote:
GuyGadebois wrote:It is indeed a stilling chamber, aka intake resonator.


Well no it has nothing to do with it! Do not try to be right on this one! : Cheesy:

consommer-moins-auto/renault-modus-1-4-16v-boite-etrange-sur-la-prise-d-air-d-admission-t16313.html#p380950
How it has nothing to do? That's what I was thinking about.
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