[RoelfleRoux]

Engine Brake Assist Control (EBAC)

Gents,

Exactly what is EBAC?

Active Traction Control (ATC)
with Engine Brake Assist Control
(EBAC)No matter how wet or rugged conditions
get, ATC guarantees maximum grip offroad.
This intelligent system recognises if
a wheel is slipping and instantly brakes
the spinning wheel, sending extra power
and torque to the other wheels that still
have good traction – to keep you moving.
This system also includes EBAC, which
ensures that engine braking and traction
won’t be lost due to spinning wheels when
making a steep descent. This system works
automatically when descending steep
slopes in 4LLc mode.

I have Googled all over the place and found the above, but not a definitive answer. It isn’t a normal “hill decent control”, because it doesn’t prevent the car from “over speeding” down the hill - even in 4LLc 1st gear.

My specific questions are:

· Is it the opposite of T/C? In other words when a wheel stops to turn (having lost traction), is the brake force applied to the wheel(s) with traction?
· Must one be applying the brakes for the system to become active? (The more I read this question, the more silly does it seem, but I’d like it cleared up). I’m pretty sure I’ve never experienced any deceleration, except for engine compression, when dropping down a steep decent in 4LLc.

Regards,
Roelf

[Bigwill]

The only Brake Assist that I know of in a Pajero context is the automatic downshift that accurs at speed when decending on the overrun and gravity causes the car to accelarate. Often people are surprised when the autobox unexpectedly changes down with no right foot at all when going down a hill. The handbook says it does that to save the brakes when decending a steep hill. Not sure if that is also called EBAC.

[RoelfleRoux]

Bigwill,

Nope, EBAC only operates in 4LLc.

Out of interest: I found the DiDs gear down much more frequent than the 3.8V6 versions.

[Bigwill]

I found the DiDs gear down much more frequent than the 3.8V6 versions.

That is probably due to the very low engine speed that the DiD runs at. How much engine braking can one expect at 60 KPH in 5th. when the engine speed is about 900 to 1000 RPM?

[RoelfleRoux]

Yip, makes a lot of sense.

[Josef9177]

On last OTR event nothing helped me in steep descents and without control I hit a rock and two tyre got burst. But yes I was on wrong tyres on sticky mud terrain..

so basic thing is traction whether its uphill or downhill.no aid is gonna work without grip.

Even the ABS was not working there..on one straight slope the car came down so fast with wheels completely locked by brakes but I can't steer..the other slope I dint apply brakes and no engine breaking or EBAC dint help and the tyre got burst:)

[RoelfleRoux]

Josef,

I saw the pics you posted after the event. A touch over the top for a standard Pajero on highway boots Electronic driving aids can only do so much and then it is over to "hang on - here we come!"

My thinking is still that EBAC does the following:
1) It only operates when you apply the brakes
2) It senses which wheels are rotating and only applies brake force to those wheels - which is the opposite to normal ABS application.
3) It only operates in 4LLc (according to the Googled info in my OP). I'm assuming that EBAC replaces ABS when you engage 4LLc.

It would be nice if somebody can confirm these assumptions or show me the correct working of the system.

Roelf