Tesla offers blended braking (regen when pressing the brake pedal)

[kempez]

So he believes using compression brakes in large trucks is costing the truckers more?

he was only talking about cars mate ? and ICE ones at that (this was a few years ago)

 

[Vercingetorix]

My gas Audi will not upshift going downhill when the throttle is lifted. It will hold gear until 4000+ rpm. Great for towing.

 

[TonyR]

I think the old advice to use the engine for braking originated from when drum brakes were very prone to overheat and fail going down hills. It made sense. I still use engine braking on hills in ICE cars.

Try taking a road car on a test track to experience jut how fast disc brakes can fade and fail on you. On a hill you are far better to use the engine to brake than the disc brakes. If your disc brakes overheat and fail your are cooked. If the engine fails for some reason you can always stop on the disc brakes.

 

[Vercingetorix]

? Uh oh.

 

[f1eng]

Try taking a road car on a test track to experience jut how fast disc brakes can fade and fail on you. On a hill you are far better to use the engine to brake than the disc brakes. If your disc brakes overheat and fail your are cooked. If the engine fails for some reason you can always stop on the disc brakes.

Michael Schumacher, when he first started earning lots of money in 1993/4, decided he wanted a super car.
He had fun choosing one, trying all those he could and since he had no road car affiliation he could have any one of them.
He chose a Bugatti EB110 which was much better than any other in every way (It was before Bugatti became part of VW and adopted the very heavy VW modular engine design).

Anyway he showed up at the Paul Ricard circuit test in it (instead of his fiancées mini he used before) and while we were making some big chassis change for the test took one of the Cosworth mechanics for a few laps - and went into a gravel trap after boiling the brake fluid.
Not many road cars have any brake cooling at all making them unsuited to track use.

 

[TonyR]

Michael Schumacher, when he first started earning lots of money in 1993/4, decided he wanted a super car.
He had fun choosing one, trying all those he could and since he had no road car affiliation he could have any one of them.
He chose a Bugatti EB110 which was much better than any other in every way (It was before Bugatti became part of VW and adopted the very heavy VW modular engine design).

Anyway he showed up at the Paul Ricard circuit test in it (instead of his fiancées mini he used before) and while we were making some big chassis change for the test took one of the Cosworth mechanics for a few laps - and went into a gravel trap after boiling the brake fluid.
Not many road cars have any brake cooling at all making them unsuited to track use.

QED. So use engine braking more. Also the drivers on track (and if you are hussling on the road) will brake hard in a straight line into a corner and then steer and balance it with the throttle, using acceleration and engine braking, through the corner. I can understand on US roads which tend to be straight how coasting on lift off can be an advantage but if you are dealing with twisty roads one pedal is better and on a long alpine descent engine braking to save the brakes overheating. YMMV

 

[f1eng]

QED. So use engine braking more. Also the drivers on track (and if you are hussling on the road) will brake hard in a straight line into a corner and then steer and balance it with the throttle, using acceleration and engine braking, through the corner. I can understand on US roads which tend to be straight how coasting on lift off can be an advantage but if you are dealing with twisty roads one pedal is better and on a long alpine descent engine braking to save the brakes overheating. YMMV

My experience is mainly racing and most of the top drivers I worked with varied their braking to suit the circuit - only braking in a straight line is not common IME.

I prefer coasting when cruising and regen with brake pedal when pressing on, personally.

I have one-pedal driving on my Husqvarna mower, which I don't like but have got used to.

I was brought up in Kirkham

 

[TonyR]

My experience is mainly racing and most of the top drivers I worked with varied their braking to suit the circuit - only braking in a straight line is not common IME.

I prefer coasting when cruising and regen with brake pedal when pressing on, personally.

I have one-pedal driving on my Husqvarna mower, which I don't like but have got used to.

I was brought up in Kirkham

Maybe differences between how I was taught years ago with gears and clutches and today. But not sure how you'd brake in the corner unless something has gone wrong and you're bailing. It just takes too long to switch pedals unless you've mastered left foot braking. I was taught brake hard and late in a straight line to get the right entry speed and gear for the corner then turn in and balance it in on the throttle then accelerate out from the apex. But times change.

Kirkham' going through a bit of a renaissance ?

 

[f1eng]

Maybe differences between how I was taught years ago with gears and clutches and today. But not sure how you'd brake in the corner unless something has gone wrong and you're bailing. It just takes too long to switch pedals unless you've mastered left foot braking. I was taught brake hard and late in a straight line to get the right entry speed and gear for the corner then turn in and balance it in on the throttle then accelerate out from the apex. But times change.

Kirkham' going through a bit of a renaissance ?

I started working in racing in the 1970s when we still had 3 pedals and driver skill with the gearbox in terms of not damaging it and not missing shifts - the difficulty of changing gear and driving an engine with difficult throttle response was the main reason we had overtaking back then - not aero.

Now my Mum could change gear as well as Lewis.

Drivers used heel and toe so they could brake whilst shifting down and usually braked to the apex IME.

I lived in Kirkham from 1957 to 1968, it was an ex-cotton town then.

 

[SHM]

Before regeneration was not shut off when you hit the brake pedal, but since mechanical brakes were taking most of the energy, regen didn't recoup as much. This new mode disables regen on accelerator lift-off, only applies regen when brake pedal is pressed, i.e. blended braking. It will also allow Tesla to regen much harder, something they could never do with one-pedal (it would be too jarring to allow 250kW regen when foot lifts off the accelerator).

I think it theoretically should be possible with the older ones too, as you can put the cars in N while driving and it will coast. The brake booster is an ebrakebooster and it is possible to adjust level of regen on the older cars, but also via third party control like enhance app.


I dont know if they will do it for the older ones, as I guess it will maybe make them have to retest WLTP etc. for cars already tested with different setup.