wide band O2 senso and Bosch questions

[Daniel]

Bernd  did you used to work there as well ?

Daniel

----- Original Message -----
From: "Bernd Felsche" <bernie at innovative.iinet.net.au>
To: <diy_efi at diy-efi.org>
Sent: Friday, August 31, 2001 9:47 AM
Subject: Re: wide band O2 senso and Bosch questions


> Greg Hermann tapped away at the keyboard with:
>
> > At 2:58 PM 8/30/01, Camden Lindsay wrote:
> > >I hope this is not looked at as a waste of bandwidth/etc...
> > >I will say what i've heard, although it isn't mutch
> > >--I would guess it is a "about to be introduced"-- but i have read that
some
> > >japanese manufacturers are using it in japan (isuzu, i think..).. and i
have
> > >also read that the US's gas has too much sulfur in it to make
DInjection
> > >possible (road and track i think-- about 1.5 years ago)
> > >--Of course, this may all be hogwash
> >
> > Not a waste of bandwidth at all. I know a fair bit about the
> > Orbital stuff from Perth. (Air boosted direct injectors.)
>
> The air-boosted system has the notional advantage of droplet-shear,
> resulting in a finer mist to vapourize. The expense and complexity
> of an air pump is a known disadvantage.
>
> It's more likely that Siemens would exploit its relationship with
> Orbital (Synerject) and move an air-boosted system closer to
> production, partly because of the compound injector/spark plug
> allowing engine designers more space for valves in the head.
>
> Audi had to go to 4 valves (from 5) on their DI engines. There's an
> Audi A4 with direct injection just released (or about to be) in
> Germany. It has 16 valves in the 2-litre engine.
>
> > It would appear that Bosch is taking (or is about to take) some
> > form of direct injection a bit more mainstream.
>
> > Was wondering whether they are using air boost, or hydraulic
> > multiplication, as in Navistar IH and the power stroke
> > diesels---or something different yet??
>
> There's a separate hi-pressure fuel pump.
>
> I've snipped some details from VW Press releases. See below
> signature.
>
> The need for low-sulphur fuels is due to the catalytic converter
> technology; at lean-burn, the NOx storage cat would be contaminated
> with sulphur; a burn-off of the contamination would require running
> fuelling at stoich or richer, negating the benefits of lean-burn.
> The life of the cat is also affected.
>
> More details soon...
>
> --
> Bernd Felsche - Innovative Reckoning, Perth, Western Australia
>
> VW Press Release Th 2000/11/02
> Fuel Stratified Injection
>
> At last year's IAA motor show in Frankfurt, Volkswagen presented its
> new LUPO FSI with a direct-injection fuel-engine. This model uses 25
> percent less fuel than a conventional car. A good 15 percent is due
> to the FSI technology alone. The remaining 10 percent saving is the
> result of carefully-planned weight-saving design.  Innovative
> materials and advanced engine technology limit the average fuel
> consumption to less than 5l/100 km - an impressive achievement
> given a power output of 77 kW and a peak torque of 130 Nm.
>
>
> More VW Press Mo 2000/09/04
> Lupo FSI Launches New Era for Petrol Engine
>
> With a maximum speed of close to 200 km/h, Lupo consumes a mere 4.9 l
> of fuel per 100 km
>
> Most environment-friendly fuel-stratified injection engine
> In November, Volkswagen introduced Germany's first stratified-charge
> gasoline direct injection engine. The name of the car: Lupo FSI.
> Paving the way for a new generation of extremely economical,
> low-emission petrol engines, its average mileage is 4.9 litres per
> 100 km (MVEG standard). In comparison with other automobiles of its
> class, the Lupo FSI offers up to 30 percent more economy.
> Given its direct injection technology and cutting-edge exhaust
> treatment, the Lupo FSI is more than just a new variation within a
> successful range; it marks the starting point for a new phase in
> petrol-engine construction.
>
> For the initial phase of conversion from conventional multi-point to
> fuel-stratified injection, Volkswagen chose an engine that it also
> uses for the Polo and Golf production series: the EA 111 series, 1.4
> litre four-cylinder engine. The essential advantage is that the new
> FSI technology need not be restricted to the Lupo alone, but can be
> adapted for mass-quantity use in the two immediately higher
> vehicle-size classes.  [i.e. Polo and Golf]
>
> Volkswagen's choice of FSI technology combined with a method of
> exhaust treatment that, for the most part, is absolutely new
> guarantees considerable advances in the way of ecology. A new (fully
> electronic) monitored system of exhaust treatment (per on-board
> diagnosis) ensures that any pollutants generated by the FSI engine
> are completely converted to non-toxic gases. Exhaust gas is purified
> by a three-way catalyst, an NOx accumulated catalyst and an NOx
> sensor (a worldwide first). A common rail system executes direct
> fuel injection. Powered by 100-bar pressure, fuel is injected
> directly into the combustion chamber via the respective
> electromagnetic injector, so that the intervals between fuel supply
> - in keeping with the stroke of the cylinder - can be precisely
> defined, as can the time required for the fuel-and-air mix.
>
> The Lupo FSI is standard-fitted with an automated five-speed direct
> shift gearbox. This gearbox has also been used for the Lupo 3L TDI.
> It enables ideal shift points (in Eco mode) so as to keep fuel
> consumption to an absolute minimum. To make use of the engine's full
> power potential, drivers can switch to Sport mode or shift gears
> manually using the Tiptronic feature.
>
> [snip]
>
> The vehicle's driving properties actively correspond with those
> criteria. Neutral handling, standard four-channel ABS, electronic
> stability programme (ESP), likewise standard in Germany, and robust
> disc brakes provide driving support even in adverse situations.
> But the Lupo FSI is not just a veritable technology carrier, it is a
> compact-class car that offers a high degree of quality and comfort.
> Whether for short- or long-distance travel (680 km range with a
> 34-litre tank) or inner-city commuting, passengers will enjoy the
> comfort and the safety of the car.
>
> [snip pricing etc]
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