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Should all new cars have electronic speed limiters?
Miscellaneous UK car topics Other UK car topics (uk.rec.cars.misc)
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#91
 
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Re: Should all new cars have electronic speed limiters? -
05-09-2007
, 08:48 AM
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Conor (conor.turton (AT) gmail (DOT) com) gurgled happily, sounding much like they were saying : Lorry techs must be dim. All it needs is a simple PIC chip stuck in the wire from the speed pulse generator. 16 pulses in 15 out, 58.66mph reads as 55mph, 16 pulses in 14 out 62.8mph reads as 55mph. Could even have a switch to disconnect it and re-connect the wire, easy to hide so any testing short of a complete dash loom strip wouldn't find it. Use a reed switch and have the magnet as a dash fetish - driver picks it up as they exit the cab (or pull over). You're assuming that it takes the info from the speedo. You are aware that tachographs are now fed the info from the engine management? The only thing your wonderful solution would do on any lorry built in the last few years is fuck up the instrument panel. And the instrument panel is fed from the engine management. How does the engine management know the road speed...? Gearbox sender and or wheel sensors for ABS. So I suspect your next |
What an excellent idea...lets fuck up the ABS on the one vehicle that
needs it.
--
Conor
Light travels faster than sound. This is why some people appear bright
until you hear them speak.........
#92
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*geek sign* What's an "E63AMG" for normal people?  Too expensive. |
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Conor
Light travels faster than sound. This is why some people appear bright
until you hear them speak.........
#93
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On Mon, 7 May 2007 20:28:51 +0100, Conor <conor.turton (AT) gmail (DOT) com wrote: In article <08iu33117jbarel9plkbn3i1av0rn0d4vu (AT) 4ax (DOT) com>, Ed Chilada says... On Sun, 6 May 2007 14:58:02 +0100, "Sla#s" <phil (AT) KNOTslatts (DOT) net wrote: 2. Lower emissions and fuel usage Un-proven - in fact the reverse has been shown as cruise controls use more fuel. Not in my experience - cruise control keeps the MPG higher. What's this research ("has been shown"), you're referring to? Try the Top Gear programme where J Clarkson takes an Audi A8 from London to Edinburgh and gets better MPG than the cruise control. Yes I recall that, but surely it's hardly scientific unless he did the exact same journey twice? What other method do you suggest other than driving and measuring the |
And when you consider that the stretch the CC was on was the one that
would return higher MPG because it was a fairly even motorway as
compared to twisty A roads, it is more than relevent.
--
Conor
Light travels faster than sound. This is why some people appear bright
until you hear them speak.........
#94
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Maybe higher than you can manage but on an economy run it's better to not use cruise control. Cruise keeps constant speed even when it would be more economical to ease off, especially on hill climbs. You've not done an economical driving course have you? |
--
Conor
Light travels faster than sound. This is why some people appear bright
until you hear them speak.........
#95
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Lorry techs must be dim. All it needs is a simple PIC chip stuck in the wire from the speed pulse generator. 16 pulses in 15 out, 58.66mph reads as 55mph, 16 pulses in 14 out 62.8mph reads as 55mph. Could even have a switch to disconnect it and re-connect the wire, easy to hide so any testing short of a complete dash loom strip wouldn't find it. Use a reed switch and have the magnet as a dash fetish - driver picks it up as they exit the cab (or pull over). You're assuming that it takes the info from the speedo. You are aware that tachographs are now fed the info from the engine management? The only thing your wonderful solution would do on any lorry built in the last few years is fuck up the instrument panel. And the instrument panel is fed from the engine management. How does the engine management know the road speed...? Gearbox sender |
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and or wheel sensors for ABS. So I suspect your next clever idea is to be to interrupt that signal to the engine management. |
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What an excellent idea...lets fuck up the ABS on the one vehicle that needs it. |
#96
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What an excellent idea...lets fuck up the ABS on the one vehicle that needs it. shrug> You think that's going to be the top concern? When it is one of the main things that has virtually eliminated trailer |
Also some cruise controls won't work with an ABS fault which would
annoy the hell out of me.
And as ABS IS MANDATORY for HGVs, any lorry going through a VOSA
checkpoint with the ABS warning light lit could be in for a bit of a
going over.
--
Conor
Light travels faster than sound. This is why some people appear bright
until you hear them speak.........
#97
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You've not done an economical driving course have you? No, but I can get 32mpg from a 4.2L supercharged Jaguar. I can get 15MPG from a 14L turbocharged 17 tonne lorry... |
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Cruise control on an auto will change down and rev the nuts off on a hill climb. You've never driven an auto, with cruise, have you? Only on a lorry and the buggers never change how you want them to on |
--
Conor
Light travels faster than sound. This is why some people appear bright
until you hear them speak.........
#98
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"Pete M" <pete.mur... (AT) bogoffwithzepressedmeatblueyonder (DOT) co.uk> wrote in messagenews:f1nvui$ti7$1 (AT) registered (DOT) motzarella.org... Innews:MPG.20a98ed641a6d88698a731 (AT) news (DOT) karoo.co.uk, Conor <conor.tur... (AT) gmail (DOT) com> wittered on forthwith; In article <f1nk2t$to... (AT) registered (DOT) motzarella.org>, Pete M says... How does that make them lazy? What do you think will happen when cars get limiters? The limiters will be removed. No one is going to fit a limiter to my cars. end of story. A cry heard from every haulage company yet here we are... I know a chap who makes a huge amount of money 'decommisioning' limiters from Scanias. So there are obviously people out there who don't want their trucks limited either. Mainly Irish, as it happens. No you don't, didn't you read Conor's posts, it never happens. |
based on GPS positioning to keep to the local speed limit, would take
speed readings from both the Engine Management System and the GPS
device. It would then report its status either to central control or
over the area.
For example, the German HGV tolling system equipment, being largely
GPS based equipment, can be easily disabled. However, it needs to
report its OK to passing patrol cars. The system seems to work very
well. The Swiss System checks both tachometer distance and GPS
distance, and picks up on discrepencies.
That said, although Lorry drivers have a big incentive to cheat the
system, they also have a big deterrent. Losing your licence is a
massive deterrent to a lorry driver, more so than it is to some
private motorists.
#99
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alexterrell (alexterr... (AT) yahoo (DOT) com) gurgled happily, sounding much like they were saying : 1. Be electronically limited to travel at no more than 140 / 150km/hr 150km/h is legal in some places in the EU. There are no speed limits in place in other places in the EU. Though Germany has a recommended limit of 130 km/hr, and close to |
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2. Be fitted with a GPS based speed limited limiting its speed to 15km/ hr above the prevailing speed limit. GPS is not accurate enough, not reliable enough, and the definitive mapping is not accurate enough. The mapping is being worked on at the moment. GPS is easily accurate |
time road segment recognition is not needed. What's more, high
integrity is not needed. If in doubt, default to the higher speed
limit. There will be a couple of roads next to motorways where drivers
could drive over 70mph - if they become boy racer sites cameras might
appear.
The requirements on the GPS system are actually fairly trivial
compared to that for Road User Charging.
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The advantages would be: 1. Fewer deaths caused by high speed accidents But almost certainly more caused by inattention. Good point - that would need to be assessed in trials. |
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3. The promotion of greener vehicles that might not be able to achieve 100 miles per hour (e.g. electric cars will easily match conventional car for acceleration, but not top speed). ITYF that the main restriction against higher takeup of electric vehicles is range and refuelling time. Range and cost and performance. At the moment. |
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Oh, and they aren't "greener", viewed in the round, unless electricity grows on trees where you are. |
efficient diesel. Not so in the UK, and certainly not in France.
#100
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Conor <conor.turton (AT) gmail (DOT) com> wrote: In article <1hxtfld.1xy5eycwnh2xpN%%steve%@malloc.co.uk>, Steve Firth says... Maybe higher than you can manage but on an economy run it's better to not use cruise control. Cruise keeps constant speed even when it would be more economical to ease off, especially on hill climbs. You've not done an economical driving course have you? No, but I can get 32mpg from a 4.2L supercharged Jaguar. |
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Cruise control on an auto will change down and rev the nuts off on a hill climb. You've never driven an auto, with cruise, have you? |
These must be *seriously* steep hills. Have you any examples?
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