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- Newsgroups: rec.autos.tech
- Path: sparky!uunet!munnari.oz.au!bruce.cs.monash.edu.au!merlin!cerberus!cerberus.bhpese.oz.au!david
- From: david@cerberus.bhpese.oz.au (David Masters)
- Subject: Re: Fuel Injection Question
- Organization: BHP, Newcastle, Australia
- Date: Thu, 8 Oct 1992 05:29:06 GMT
- Message-ID: <1992Oct8.052906.21910@cerberus.bhpese.oz.au>
- References: <92275.78610.J066610@LMSC5.IS.LMSC.LOCKHEED.COM> <1992Oct02.162038.36019@lobo.rmhs.colorado.edu> <1992Oct5.181410.3762@cabot.balltown.cma.COM>
- Sender: news@cerberus.bhpese.oz.au (News System)
- Lines: 39
-
- welty@cabot.balltown.cma.COM (richard welty) writes:
-
- >In article <1992Oct02.162038.36019@lobo.rmhs.colorado.edu> seanr@lobo.rmhs.colorado.edu (Sean Reifschneider) writes:
- >>In article <92275.78610.J066610@LMSC5.IS.LMSC.LOCKHEED.COM> J066610@LMSC5.IS.LMSC.LOCKHEED.COM writes:
- >>>Does anyone out there know if there is the equivalent of a choke (cold
- >>>start vavle ???) for fuel injected cars? I have been trying to narrow
-
- >>Yes, they do have a cold start system, but it depends on what kind of FI
- >>system you have. One of the Bosch systems (can't remember which one) has
- >>an 'aux. air valve) that has a heater element in it. The heater heats an
- >>element that closes the AAV when it gets warm. If the heater element in
- >>it has died, it would act as you describe.
-
- >normally this circuit is in two parts; there is a `thermo time' switch
- >which signals whether or not there is a need for cold start enrichment,
- >and there is a cold start injector which dumps extra fuel into the
- >air intake plenum. both the older Bosch D and the more current Bosch L
- >and Bosch Motronic systems are set up in roughly this fashion. the
- >cold start injectors rarely fail; the thermo time switches are more
- >likely to go.
-
- er, yes, but there is another way. Some systems handle it all
- within the normal FI system, and put more fuel out of the normal
- injectors. Bosch Motronic as used on TwinSpark 2l Alfa motors is
- an example. It means less parts, but more complexity in the chip.
-
- >richard
- >--
- >richard welty 518-393-7228
- >welty@cabot.balltown.cma.com
- > ``if you can read this, mario, you're too close''
- > -- bumper sticker seen on a CART safety truck
-
- david
-
- --
- David Masters, Group Leader - UNIX,
- BHP Information Technology, Newcastle, AUSTRALIA.
- Internet: david@bhpese.oz.au Phone: +61 49 402132
-