Team-BHP
(
https://www.team-bhp.com/forum/)
Quote:
Global component supplier Bosch has developed an electronically-controlled clutch that closes the gap between manual and automatic transmissions. In stop-and-go traffic, the Bosch eClutch allows drivers using manual transmission to use first gear without using the clutch. They can simply use the brake and gas pedal, just like in an automatic transmission. In addition, the eClutch makes the coasting function possible, which saves fuel. The clutch decouples the engine from the transmission if the driver is no longer accelerating. The engine then stops, and the company claims this results in fuel savings of up to 10 percent on average.
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Link to the article on ACI:
http://www.autocarindia.com/auto-new...ch-355000.aspx
Quote:
Originally Posted by accelerate89
(Post 3221022)
The clutch decouples the engine from the transmission if the driver is no longer accelerating. The engine then stops, and the company claims this results in fuel savings of up to 10 percent on average.
The principle behind the start-stop coasting function is simple. The Bosch system detects the driver’s easing of pressure on the gas pedal, decouples the engine from the transmission
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Innovative and useful invention, but one disadvantage is that even the manual car won't be able to use engine breaking in such a situation.
Quote:
Originally Posted by Lalvaz
(Post 3221071)
Innovative and useful invention, but one disadvantage is that even the manual car won't be able to use engine breaking in such a situation.
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I think its only for first gear. The major fatigue in manual transmission occurs when you crawl slowly in bumper to bumper traffic, using the clutch. This will take away that pain!
Quote:
Originally Posted by Lalvaz
(Post 3221071)
Innovative and useful invention, but one disadvantage is that even the manual car won't be able to use engine breaking in such a situation.
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But I would say the advantage far outweighs the disadvantages if any, and the situations where we use 1st gear engine braking would be negligible in normal driving.
Good idea, though I hope coasting is disabled as soon as the accl is pressed ?
Wow, This is certainly a complicated kit,
BUT
Quote:
The clutch decouples the engine from the transmission if the driver is no longer accelerating. The engine then stops,
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I hope the engine is shut off when the car is stationary and not while on the move.
Now, I know that it is understood that is it will be designed to shut off the engine only at stand still for but no one mentioned it.
its Bosch right, they cant go wrong. lol:
I think it just the application of some existing components. The VW DSG has what is essentially an "electronic" clutch" as well. But of course, there it works on all gears!
Still, it's a new gimmick. Might appeal to some.
Jeroen
Am sure there is far more to it than the Autocar article. As described in the article, fail to see anything really innovative or radical.
Our auto magazines used to carry an ad for a Taiwanese (I think) kit where the clutch linkage was operated by an electric motor.
Check out say the NSU Ro80.
Regards
Sutripta
I always wished something like this was available on MT cars. Hope there would be a version which can be retrofitted on all cars (as aftermarket fitment)
Quote:
Originally Posted by Sutripta
(Post 3221335)
... Taiwanese (I think) kit where the clutch linkage was operated by an electric motor. ...
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There is also a similar Korean kit. My friend had been using it for 5 years in a Swift, till one fine night last year the motor assembly fell off (bad installation). Easy to install in any MT car, as it has a Bowden cable hooking on to the clutch activation arm. The other end of the cable is spooled around a disc driven by a tangential motor. Cheap enough alternate to an autobox.
Activation is by a pushbutton mounted on the gear lever - each press disengages and then engages clutch, based on time set during configuration. Press PB, shift and leave PB. One can still drive the car by manually depressing clutch pedal as usual.
Quote:
Originally Posted by accelerate89
(Post 3221022)
Quote:
In addition, the eClutch makes the coasting function possible, which saves fuel. The clutch decouples the engine from the transmission if the driver is no longer accelerating. The engine then stops, and the company claims this results in fuel savings of up to 10 percent on average.
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Not sure about this coasting function, taking into account DFCO, i guess it only makes sense if the engine it turned off
whilst cruising. But then, how much of an advantage is that really, and what about the brake booster vaccuum?
Quote:
Originally Posted by Sutripta
(Post 3221335)
Our auto magazines used to carry an ad for a Taiwanese (I think) kit where the clutch linkage was operated by an electric motor.
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Yep. Though i guess the difference is that this time it'll have the Bosch stamp on it!
Wasn't there also another device that was more like a torque converter for manual cars (kinda like the old dodge fluid-drive system)?
cya
R
Quote:
Originally Posted by Rehaan
(Post 3222067)
Wasn't there also another device that was more like a torque converter for manual cars (kinda like the old dodge fluid-drive system)?
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No such recollection. But if there was would be very interested in knowing well the conventional (dog operated layshaft) gearbox worked with it.
Regards
Sutripta
Quote:
Originally Posted by DerAlte
(Post 3221688)
There is also a similar Korean kit. My friend had been using it for 5 years in a Swift, till one fine night last year the motor assembly fell off (bad installation). Easy to install in any MT car, as it has a Bowden cable hooking on to the clutch activation arm. The other end of the cable is spooled around a disc driven by a tangential motor. Cheap enough alternate to an autobox.
Activation is by a pushbutton mounted on the gear lever - each press disengages and then engages clutch, based on time set during configuration. Press PB, shift and leave PB. One can still drive the car by manually depressing clutch pedal as usual.
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That's very interesting DA. Have you driven it? How well does it work in B2B traffic? Any change you can arrange for some pics?
Found this video which seems to answer a few questions!
ESC eClutch
- There's no mechanical connection
- It's a clutch by wire system
- The clutch pedal is just a sensor (made to feel like a clutch)
- Separate clutch actuator is placed near the tranny
- Traffic-jam assist (1st gear, brake + accelerator only) - clutch modulated automatically
Watch from 3:55 onwards:
http://www.youtube.com/watch?v=NnDTN18dOts
cya
R
Quote:
Originally Posted by Rehaan
(Post 3239891)
Found this video which seems to answer a few questions! ...
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A-ha! O-ho! :) Clutch-by-wire.
Simple to imagine for people who have hydraulic-actuated clutch - they have replaced the pedal with something similar to the Acc pedal (lever coupled to a potentiometer), and replaced the master cylinder with a pump + valves (controlled by an ECU) which is coupled to the "slave cylinder" - a hydraulic servo actuator like hydraulic power steering.
This has to be OE, and can't be retro-fitted - unless they give the potentiometer pedal as an aftermarket attachment which would also couple to the Master Cylinder. I would be too happy to give my Safari as a test vehicle if they bring this to India. :p
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