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Ray White
Joined: 02 Dec 2014
Posts: 6319
Location: Derby
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 Posted: Tue Feb 28, 2023 11:57 pm Post subject: |
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| One disadvantage with regenerative braking is that it is only effective at speed. Range anxiety means electric cars can not be relied on to venture far from urban areas so seldom get a good run. |
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peter scott
Joined: 18 Dec 2007
Posts: 7119
Location: Edinburgh
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| Posted: Wed Mar 01, 2023 8:58 am Post subject: |
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I guess I'm really looking for the level of control that is suggested in a reply to my question on another forum:
I can select the amount of regeneration by moving the gearstick to the left when in drive. 5 settings from none to single pedal driving.
I can imagine that single pedal driving takes some getting used to but I think when combined with adaptive cruise it could be very good.
Peter
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1939 SS Jaguar 2 1/2 litre saloon |
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Penman
Joined: 23 Nov 2007
Posts: 4761
Location: Swindon, Wilts.
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| Posted: Wed Mar 01, 2023 4:44 pm Post subject: |
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Modern IC engines don't give as much slowing effect on the overrun as the older carb engined ones, if electrics and hybrids have none I suspect a conspiracy by brake pad and brake disc manufacturers to sell more of their produce.
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peter scott
Joined: 18 Dec 2007
Posts: 7119
Location: Edinburgh
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| Posted: Fri Mar 03, 2023 5:58 pm Post subject: |
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I discovered how to make this Audi thing recover energy on the overrun.
You have to be in flappy paddle mode. It then recovers quite well but presents yet another cause for complaint. Although flappy paddle mode suggests a clutchless manual mode, unfortunately it's not. It doesn't stay where you put it and is for ever changing down when it's not required meaning that I'm for ever changing it back up again. Give me a proper manual cog box any day.
Peter
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1939 SS Jaguar 2 1/2 litre saloon |
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petelang
Joined: 21 May 2009
Posts: 444
Location: Nottingham
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| Posted: Fri Mar 03, 2023 8:55 pm Post subject: |
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Peter, does it do that in "sport" mode? Sometimes the programming is different to give you a better manual experience.
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peter scott
Joined: 18 Dec 2007
Posts: 7119
Location: Edinburgh
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| Posted: Fri Mar 03, 2023 11:27 pm Post subject: |
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Thanks Pete, I'll need to check what the difference is between Sport and Manual modes.
Peter
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1939 SS Jaguar 2 1/2 litre saloon |
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Bitumen Boy
Joined: 26 Jan 2012
Posts: 1735
Location: Above the snow line in old Monmouthshire
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| Posted: Sat Mar 04, 2023 1:29 pm Post subject: |
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| Penman wrote: | | Modern IC engines don't give as much slowing effect on the overrun as the older carb engined ones, if electrics and hybrids have none I suspect a conspiracy by brake pad and brake disc manufacturers to sell more of their produce. |
That's a fact. Several years ago now when I first had a modern(ish) car after nothing but oldies I nearly came a cropper on a roundabout at the bottom of a minor hill, the car picked up much more speed than I expected coming down the hill due to the lack of engine braking and I entered the roundabout a lot faster than I would have wanted to. With it being so much quieter than the oldies I was used to I just didn't notice the speed increasing. Luckily that time I got away with it but it was a nasty surprise. |
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Ray White
Joined: 02 Dec 2014
Posts: 6319
Location: Derby
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| Posted: Sat Mar 04, 2023 2:05 pm Post subject: |
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| Not all old cars have engine braking all the time. The fad for a "free wheel" on bigger cars could take you by surprise sometimes. The old Rovers had that system as did our 3 litre Austin Princess. You had to watch out when going down hill because the brakes - while good - were not enough on their own. |
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ukdave2002
Joined: 23 Nov 2007
Posts: 4105
Location: South Cheshire
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| Posted: Sat Mar 04, 2023 7:25 pm Post subject: |
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I suspect that more modern engines are mated to automatic transmissions, this will reduce engine braking. With a manual there is no reason why a modern ic engine would have less engine braking.
Dave |
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Bitumen Boy
Joined: 26 Jan 2012
Posts: 1735
Location: Above the snow line in old Monmouthshire
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| Posted: Sun Mar 05, 2023 1:54 am Post subject: |
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| ukdave2002 wrote: | I suspect that more modern engines are mated to automatic transmissions, this will reduce engine braking. With a manual there is no reason why a modern ic engine would have less engine braking.
Dave |
I don't know about the engine technology, but I was nearly caught out driving a manual car and one thing that is different is the overall gearing tends to be taller on a modern. The hill I mentioned previously was one that my old Herald would "walk" down in top without picking up speed, but a modern will pick up speed and need a little touch of braking going down in third. |
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peter scott
Joined: 18 Dec 2007
Posts: 7119
Location: Edinburgh
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| Posted: Mon Mar 06, 2023 10:39 pm Post subject: |
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I've actually found a reasonably acceptable regenerative setting. The car offers D, M and S modes and D mode gives next to no regenerative action. M mode gives regeneration but refuses to remain in the gear I choose. S is an auto mode like D expect that it does have regeneration and works essentially as single pedal except that you may need to press the brake pedal if there isn't sufficient regen retardation.
Peter
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badhuis
Joined: 20 Aug 2008
Posts: 1391
Location: Netherlands
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| Posted: Tue Mar 07, 2023 11:56 am Post subject: |
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| Ray White wrote: | | Not all old cars have engine braking all the time. The fad for a "free wheel" on bigger cars could take you by surprise sometimes. The old Rovers had that system as did our 3 litre Austin Princess. You had to watch out when going down hill because the brakes - while good - were not enough on their own. |
That surprises me Ray. I have driven my Westminster (also with freewheel) on mountains (Alps) and never found the brakes to be lacking. In my Triumph 2000 the front disks would glow red down the hill but not on the Westminster.
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Penman
Joined: 23 Nov 2007
Posts: 4761
Location: Swindon, Wilts.
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| Posted: Tue Mar 07, 2023 2:10 pm Post subject: |
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But were yhou going down those Alps in Freewheel Mode.?
I always got it ba ck into n on -freewheel when going down steep hills (the ones with the sign advising Low Gear for x distance) in my A55 Cambridge.
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Penman
Joined: 23 Nov 2007
Posts: 4761
Location: Swindon, Wilts.
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| Posted: Tue Mar 07, 2023 2:11 pm Post subject: |
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But were you going down those Alps in Freewheel Mode.?
I always got it ba ck into n on -freewheel when going down steep hills (the ones with the sign advising Low Gear for x distance) in my A55 Cambridge.
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Bristols should always come in pairs.
Any 2 from:-
Straight 6
V8 V10 |
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alastairq
Joined: 14 Oct 2016
Posts: 1954
Location: East Yorkshire
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| Posted: Tue Mar 07, 2023 4:07 pm Post subject: |
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Yeee-Haaa mode?
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