Braking with the Pedal safer?
Discussion
After reading this thread... https://www.pistonheads.com/gassing/topic.asp?h=0&...
It got me thinking about electric/hybrid vehicles with regenerative braking, due to the number of idiots on the roads these days that insist on sitting close enough behind to read your speedo or who just don't pay attention while driving and suddenly panic brake when the brake lights of the car in front come on, just wondering if there has there been an increase in the number of rear end shunts caused by regenerative braking and lack of brake lights?
Some idiot thought it a good idea to have front only DRL's which is just stupid, so should brake lights light up under regen braking for safety?
It got me thinking about electric/hybrid vehicles with regenerative braking, due to the number of idiots on the roads these days that insist on sitting close enough behind to read your speedo or who just don't pay attention while driving and suddenly panic brake when the brake lights of the car in front come on, just wondering if there has there been an increase in the number of rear end shunts caused by regenerative braking and lack of brake lights?
Some idiot thought it a good idea to have front only DRL's which is just stupid, so should brake lights light up under regen braking for safety?
There's a specifed deceleration that requires brake lights in EU legislation; It's less than you'd expect too - My friend is often concious of the fact his brake lights are on practically whenever you lift the throttle, even in cases where you could get similar levels of engine braking from some ICE cars.
Saleen836 said:
I did but they only illuminate at a certain level, I guess the levels differ from marque to marque maybe?
Does your ICE car’s brakes come on when you engine brake?Of course regen only causes brake lights at certain deceleration rates, ones that would be greater than that of simply coasting.
Saleen836 said:
After reading this thread... https://www.pistonheads.com/gassing/topic.asp?h=0&...
It got me thinking about electric/hybrid vehicles with regenerative braking, due to the number of idiots on the roads these days that insist on sitting close enough behind to read your speedo or who just don't pay attention while driving and suddenly panic brake when the brake lights of the car in front come on, just wondering if there has there been an increase in the number of rear end shunts caused by regenerative braking and lack of brake lights?
Some idiot thought it a good idea to have front only DRL's which is just stupid, so should brake lights light up under regen braking for safety?
Some cars have rear sidelights on with front DRLs - my 2018 Leon, for instance. It got me thinking about electric/hybrid vehicles with regenerative braking, due to the number of idiots on the roads these days that insist on sitting close enough behind to read your speedo or who just don't pay attention while driving and suddenly panic brake when the brake lights of the car in front come on, just wondering if there has there been an increase in the number of rear end shunts caused by regenerative braking and lack of brake lights?
Some idiot thought it a good idea to have front only DRL's which is just stupid, so should brake lights light up under regen braking for safety?
Saleen836 said:
After reading this thread... https://www.pistonheads.com/gassing/topic.asp?h=0&...
It got me thinking about electric/hybrid vehicles with regenerative braking, due to the number of idiots on the roads these days that insist on sitting close enough behind to read your speedo or who just don't pay attention while driving and suddenly panic brake when the brake lights of the car in front come on, just wondering if there has there been an increase in the number of rear end shunts caused by regenerative braking and lack of brake lights?
Some idiot thought it a good idea to have front only DRL's which is just stupid, so should brake lights light up under regen braking for safety?
The regulations are pretty clear. See below. There is no cause for concern. Regulators and manufacturers were thinking about this long before we were. It got me thinking about electric/hybrid vehicles with regenerative braking, due to the number of idiots on the roads these days that insist on sitting close enough behind to read your speedo or who just don't pay attention while driving and suddenly panic brake when the brake lights of the car in front come on, just wondering if there has there been an increase in the number of rear end shunts caused by regenerative braking and lack of brake lights?
Some idiot thought it a good idea to have front only DRL's which is just stupid, so should brake lights light up under regen braking for safety?
Don't forget that regen braking varies. Some cars it can be quite weak, and on others, it can be stronger, and on some, you as the driver, can alter the strength of regen whilst driving.
Source: https://op.europa.eu/en/publication-detail/-/publi...
georgeyboy12345 said:
Rather than safety, the biggest issue with driving an EV on a high regen setting or one pedal driving is that it’s way less efficient than just lifting off the accelerator and coasting.
Drive around town where high regen is good then turn it on. Drive out of town where it isn’t then turn it off.Not exactly rocket science is it.
georgeyboy12345 said:
Rather than safety, the biggest issue with driving an EV on a high regen setting or one pedal driving is that it’s way less efficient than just lifting off the accelerator and coasting.
Are you certain about that? I'd be interested to see the research you are referencing as it is something I am curious about. PF62 said:
georgeyboy12345 said:
Rather than safety, the biggest issue with driving an EV on a high regen setting or one pedal driving is that it’s way less efficient than just lifting off the accelerator and coasting.
Drive around town where high regen is good then turn it on. Drive out of town where it isn’t then turn it off.Not exactly rocket science is it.
Toltec said:
georgeyboy12345 said:
Rather than safety, the biggest issue with driving an EV on a high regen setting or one pedal driving is that it’s way less efficient than just lifting off the accelerator and coasting.
Are you certain about that? I'd be interested to see the research you are referencing as it is something I am curious about. The regen process is not 100% efficient, converting kinetic energy back to chemical energy in the battery via electrical energy, with associated losses through friction, heat and sound overall consumes more energy than just utilising the kinetic energy you already have while moving. It’s the first law of thermodynamics.
Regen is only useful under braking.
Bizarre thread!
It's not even an EV thing, loads of ICE cars have automatic braking and some use a little regen too.
All that's happened as a result is brake lights are more accurately linked to deceleration rates than before, it's a good thing.
I'm going to rate this a 0/10 effort in terms of trying to find new ways to take a dig at EV's
It's not even an EV thing, loads of ICE cars have automatic braking and some use a little regen too.
All that's happened as a result is brake lights are more accurately linked to deceleration rates than before, it's a good thing.
I'm going to rate this a 0/10 effort in terms of trying to find new ways to take a dig at EV's
Saleen836 said:
Some idiot thought it a good idea to have front only DRL's which is just stupid
Surely the brake lights coming on are a lot more noticeable in daylight when the normal bulbs are off. Especially on something with a simple light signature using the same bulbs for braking and normal lighting as opposed to the complex and bright LED lights on more expensive metal.Haltamer said:
There's a specifed deceleration that requires brake lights in EU legislation; It's less than you'd expect too - My friend is often concious of the fact his brake lights are on practically whenever you lift the throttle, even in cases where you could get similar levels of engine braking from some ICE cars.
That. I’ve had a Tesla and now we have a Honda and both have little cars on the dash display which light their brake lights up when the real ones come on. The level of ‘braking’/ regen required is surprisingly low.They’re lit up a lot more than on an ICE car, trust me.
georgeyboy12345 said:
Nope. Coasting is still much more efficient than regen, even around town.
Yes, it is. But in congested driving conditions, there isn't as much opportunity to coast to a halt; quite often you'll be required to brake more often. Storing this energy to reuse is better than the (unavoidable) braking.There's a reason loads of taxi drivers in cities use the Prius.
Of course where possible, coasting is indeed better - but those opportunities are limited when you're in heavy traffic, or have lots of traffic lights on your route.
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