Forum-Gallery-Shop-Sponsors

« Advertise on Freel2.com

Home > Technical > Engine braking.
Post Reply  Down to end
Page 1 of 1
Print this entire topic · 
blacktiger



Member Since: 31 Oct 2015
Location: St.Leonards on sea
Posts: 564

England 2013 Freelander 2 SD4 HSE Auto Santorini Black
Engine braking.

Does anyone know why the FL2 has such poor engine braking? Both the manual and auto that I've owned just rev out right up to 4000rpm before I feel anything like retardation/resistance.
Whilst on holiday, down under, I had a few different diesel hire cars with auto gearboxes. Toyota Highlander, Toyota Landcruiser, Mitzy Pajero Sport. They all had better engine braking. Also, my previous Citroen diesels have all had decent engine braking.
Seems odd to me that with something like a 20:1 compression there seems to very little on these Freelanders. MY13 Santorini Black SD4 HSE

Post #369530 2nd Apr 2019 11:50 am
View user's profile Send private message View poster's gallery Reply with quote
Lightwater



Member Since: 21 Aug 2014
Location: Sydney Northern Beaches
Posts: 4731

Ukraine 2013 Freelander 2 2.0T SE Auto Fuji White

I think the others have larger engines in relation to car mass as they don't have a turbo. Then there would be more engine mass to push around. Procrastination, mankind's greatest labour saving device!

Acoustic insulation ARB TPMS 3xARB air compressors After cooler Air tank On-board OCD pressure air/water cleaning Additional 50L fuel Carpet in doors ABE 2x1kg Waeco 28L modified fridge Battery 4x26ah Solar 120w Victron MPPT 100/20 DC-DC 18amps 175amp jumper plug Awning 6x255/60R18

Post #369533 2nd Apr 2019 12:24 pm
View user's profile Send private message View poster's gallery Reply with quote
blacktiger



Member Since: 31 Oct 2015
Location: St.Leonards on sea
Posts: 564

England 2013 Freelander 2 SD4 HSE Auto Santorini Black

Every car mentioned has a turbo.

Apart from the Landcruiser which was a 3.0, the others I don't know what size they were. MY13 Santorini Black SD4 HSE

Post #369534 2nd Apr 2019 12:58 pm
View user's profile Send private message View poster's gallery Reply with quote
dondiddy



Member Since: 16 Apr 2017
Location: Hamilton
Posts: 753

United Kingdom 2012 Freelander 2 TD4 HSE Manual Firenze Red

Not sure why but the Disco Sport that I now have with the Freelander 2.2 engine has loads of engine braking and its an auto. You hardly need the brakes as you can drive it on the throttle most of the time. Although its only about 5 months or so I can`t really remember what the Freelander I had prior to this was like in terms of engine braking. (manual gearbox)

Post #369541 2nd Apr 2019 1:38 pm
View user's profile Send private message View poster's gallery Reply with quote
jules



Member Since: 13 Dec 2007
Location: The Wilds of Warwickshire
Posts: 4571

United Kingdom 2014 Freelander 2 SD4 SE Auto Firenze Red
Re: Engine braking.

blacktiger wrote:
Does anyone know why the FL2 has such poor engine braking? Both the manual and auto that I've owned just rev out right up to 4000rpm before I feel anything like retardation/resistance.
Whilst on holiday, down under, I had a few different diesel hire cars with auto gearboxes. Toyota Highlander, Toyota Landcruiser, Mitzy Pajero Sport. They all had better engine braking. Also, my previous Citroen diesels have all had decent engine braking.
Seems odd to me that with something like a 20:1 compression there seems to very little on these Freelanders.


But the high compression just pushes the piston back down again after TDC. You dont get much engine braking with a diesel compared with a petrol (which has a throttle and creates vacuum during induction if fully closed), unless you have an engine brake. Engine brakes are found on big trucks and banned in towns as they are very noisy.

The Jacobs Engine BrakeĀ® (also known as the "Jake BrakeĀ®") is a diesel engine retarder that uses the engine to aid in slowing and controlling the vehicle. When activated, the engine brake alters the operation of the engine's exhaust valves so that the engine works as a power-absorbing air compressor.

 Jules

Post #369550 2nd Apr 2019 5:37 pm
View user's profile Send private message View poster's gallery Reply with quote
blacktiger



Member Since: 31 Oct 2015
Location: St.Leonards on sea
Posts: 564

England 2013 Freelander 2 SD4 HSE Auto Santorini Black

Thanks for all the replies so far but most have missed my point. And that is that the FL2 is a lot worse than other similar cars. MY13 Santorini Black SD4 HSE

Post #369553 2nd Apr 2019 6:47 pm
View user's profile Send private message View poster's gallery Reply with quote
booktrunk



Member Since: 05 Apr 2017
Location: Loughborough
Posts: 156

United Kingdom 2010 Freelander 2 TD4_e GS Manual Stornoway Grey

Different. 2010 Freelander2 TD4_e GS
--
"Any society, any nation, is judged on the basis of how it treats its weakest members -- the last, the least, the littlest."

Post #369555 2nd Apr 2019 8:44 pm
View user's profile Send private message View poster's gallery Reply with quote
Lightwater



Member Since: 21 Aug 2014
Location: Sydney Northern Beaches
Posts: 4731

Ukraine 2013 Freelander 2 2.0T SE Auto Fuji White

I do use the sports mode in a lower gear for long down hill braking & have found it works really well but I do have a petrol engine. I would have thought a diesel would have been even better. One learns something every day!

Down under there are signs all over the place asking truck drivers not to use engine braking in built up areas. Procrastination, mankind's greatest labour saving device!

Acoustic insulation ARB TPMS 3xARB air compressors After cooler Air tank On-board OCD pressure air/water cleaning Additional 50L fuel Carpet in doors ABE 2x1kg Waeco 28L modified fridge Battery 4x26ah Solar 120w Victron MPPT 100/20 DC-DC 18amps 175amp jumper plug Awning 6x255/60R18

Post #369561 2nd Apr 2019 10:18 pm
View user's profile Send private message View poster's gallery Reply with quote
jules



Member Since: 13 Dec 2007
Location: The Wilds of Warwickshire
Posts: 4571

United Kingdom 2014 Freelander 2 SD4 SE Auto Firenze Red

blacktiger wrote:
Thanks for all the replies so far but most have missed my point. And that is that the FL2 is a lot worse than other similar cars.


Im only guessing but could it be that your torque converter clutch is not locking up properly and so causes the drive to "slip" when you take your foot off ???

To be honest Ive not noticed the FL2 auto to be any different, in terms of engine braking, from other automatics Ive had; Disco Td5 and BMW 330D Jules

Post #369563 2nd Apr 2019 11:57 pm
View user's profile Send private message View poster's gallery Reply with quote
devondave



Member Since: 06 Dec 2010
Location: United Kingdom
Posts: 224

England 2010 Freelander 2 TD4_e GS Manual Santorini Black

Is it something to do with the anti-stall?

Post #369565 3rd Apr 2019 8:44 am
View user's profile Send private message View poster's gallery Reply with quote
dorsetfreelander



Member Since: 20 Jul 2013
Location: Dorset
Posts: 4341

United Kingdom 2014 Freelander 2 SD4 XS Auto Loire Blue

No engine braking on my SD4 auto, it just speeds up going down a hill and changes gear to match. Interestingly my wife's new Suzuki Swift auto (with a torque convertor) behaves exactly the same on the same hills. 3 x FL1 2 manual + 1 auto
5 x FL2 4 manual + 1 auto
Now Discovery Sport P250 MHEV SE

Post #369566 3rd Apr 2019 8:59 am
View user's profile Send private message View poster's gallery Reply with quote
alex_pescaru



Member Since: 12 Mar 2009
Location: RO
Posts: 4640

You will not have effective engine braking below 2000 RPM.
Switch it to sport mode, where the TCC will engage as soon as possible and remain that way as much as possible and keep revs above 2000 and you'll have engine braking.

Post #369584 3rd Apr 2019 4:30 pm
View user's profile Send private message View poster's gallery Reply with quote
blacktiger



Member Since: 31 Oct 2015
Location: St.Leonards on sea
Posts: 564

England 2013 Freelander 2 SD4 HSE Auto Santorini Black

Alex, If you read my first post again you'll see that I say that the engine revs up to 4000rpm without having much engine braking.
It doesn't matter whether it's in command shift or not. Yes, that would hold it in a lower gear and I do do that but it doesn't feel comfortable going down a long steep hill, trying to stop the brakes smoking, with the engine screaming. MY13 Santorini Black SD4 HSE

Post #369585 3rd Apr 2019 4:36 pm
View user's profile Send private message View poster's gallery Reply with quote
IanMetro



Member Since: 11 Sep 2017
Location: Somerset BS21
Posts: 2776

United Kingdom 2014 Freelander 2 SD4 Metropolis LE Auto Fuji White

If I need engine braking, I put it into 'sport' and then choose a suitable gear.

Yes, the engine does not seem to give much braking below 3k rpm, but it seems to do the job of avoiding long periods of braking.

I have noticed that when I select 'drive' again the FL2 seems to be reluctant to revert to 'drive' again if I am going below 20 mph and still on a slope. When it first ignored my request I thought that I had a auto gearbox fault, but it seems that it is a 'feature' of the car. (I hope) FL2 XS SD4 Auto 2010 2012-2017 (21k - 91k miles) (MY2011)
FL2 Metropolis SD4 Auto 2014 2017- (16k - 76k+ miles) (MY2015)

Post #369587 3rd Apr 2019 5:33 pm
View user's profile Send private message View poster's gallery Reply with quote
alex_pescaru



Member Since: 12 Mar 2009
Location: RO
Posts: 4640

blacktiger
Sorry, I was carried away with the others responses... My mistake. Embarassed
Although, if I remember correctly, my auto has enough engine braking on slopes with up to 10% gradient (didn't find more than that around here), enough braking that sometimes I need to press, for short periods, the gas pedal in order to not become to slow for the cars behind...
Of course, with the gearbox in manual mode and trying to select the correct gear in order for the RPM to be around 2500 RPM.
The engine compression, according with the manual is about 16.6 to 1...

Post #369596 3rd Apr 2019 11:44 pm
View user's profile Send private message View poster's gallery Post Reply
Post Reply  Back to top
Page 1 of 1
All times are GMT + 1 Hour

Jump to  
Previous Topic | Next Topic >
Posting Rules
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum



Site Copyright © 2006-2024 Futuranet Ltd & Martin Lewis
Freel2.com RSS Feed - All Forums


Switch to Mobile site