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Home > Technical > Engine braking. |
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Lightwater Member Since: 21 Aug 2014 Location: Sydney Northern Beaches Posts: 4906 |
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!
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2nd Apr 2019 11:24 am |
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blacktiger Member Since: 31 Oct 2015 Location: St.Leonards on sea Posts: 564 |
Every car mentioned has a turbo.
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2nd Apr 2019 11:58 am |
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dondiddy Member Since: 16 Apr 2017 Location: Hamilton Posts: 753 |
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) |
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2nd Apr 2019 12:38 pm |
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jules Member Since: 13 Dec 2007 Location: The Wilds of Warwickshire Posts: 5017 |
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 |
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2nd Apr 2019 4:37 pm |
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blacktiger Member Since: 31 Oct 2015 Location: St.Leonards on sea Posts: 564 |
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 |
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2nd Apr 2019 5:47 pm |
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booktrunk Member Since: 04 Apr 2017 Location: Loughborough Posts: 156 |
Different. 2010 Freelander2 TD4_e GS
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2nd Apr 2019 7:44 pm |
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Lightwater Member Since: 21 Aug 2014 Location: Sydney Northern Beaches Posts: 4906 |
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!
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2nd Apr 2019 9:18 pm |
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jules Member Since: 13 Dec 2007 Location: The Wilds of Warwickshire Posts: 5017 |
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 |
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2nd Apr 2019 10:57 pm |
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devondave Member Since: 06 Dec 2010 Location: United Kingdom Posts: 224 |
Is it something to do with the anti-stall? |
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3rd Apr 2019 7:44 am |
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dorsetfreelander Member Since: 20 Jul 2013 Location: Dorset Posts: 4354 |
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
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3rd Apr 2019 7:59 am |
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alex_pescaru Member Since: 12 Mar 2009 Location: RO Posts: 4642 |
You will not have effective engine braking below 2000 RPM.
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3rd Apr 2019 3:30 pm |
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blacktiger Member Since: 31 Oct 2015 Location: St.Leonards on sea Posts: 564 |
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.
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3rd Apr 2019 3:36 pm |
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IanMetro Member Since: 11 Sep 2017 Location: Somerset BS21 Posts: 3133 |
If I need engine braking, I put it into 'sport' and then choose a suitable gear.
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3rd Apr 2019 4:33 pm |
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alex_pescaru Member Since: 12 Mar 2009 Location: RO Posts: 4642 |
blacktiger
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3rd Apr 2019 10:44 pm |
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