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  #37  
Old 09-06-2015, 10:05 AM
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Re: Im in love with the ACC

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Originally Posted by 472viper View Post
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'Just be aware you're posting in a thread in the Grand Cherokee forum area...that's why there was the question.

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  #38  
Old 09-06-2015, 11:23 AM
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Re: Im in love with the ACC

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Originally Posted by Jim_in_PA View Post
'Just be aware you're posting in a thread in the Grand Cherokee forum area...that's why there was the question.

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I responded in regard to Adaptive Cruise Control which my Cherokee and my son's GC SRT8 has. A road trip with him is what sold me on ACC and when I went shopping for a Cherokee ACC was high on my list. Like the OP, I really like the ACC in mine and really hope that mpg number is accurate and ACC is the reason for it.
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  #39  
Old 10-09-2015, 09:56 AM
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Re: Im in love with the ACC

One potentially dangerous situation I've noticed with ACC on:

Approaching a red light (or other situation with stopped traffic ahead),

While behind a vehicle that is slowing down,

If I change lanes from behind the decelerating vehicle into the lane where there is stopped traffic further ahead, the ACC will rev up toward the max speed setting because it does not register stationary objects.

Of course, applying the brakes will cancel the ACC, but there is quite a surge if you're not ready for it.
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  #40  
Old 10-09-2015, 10:33 AM
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Re: Im in love with the ACC

I just used my ACC on a trip from Dallas to Austin, roughly 300 miles one way. My average MPG was 27.2. I was extremely impressed with that number. On the way back the average went down to 26.4mpg.

One thing I did notice is that when I was cruising along and the ACC registered the vehicle in front of me, as it went to slow down if I put on my indicator to switch lanes my RPM's would start to rev before I even left the lane. It seems as if the ACC is anticipating being able to accelerate with use of the indicators. Anyone else notice this?
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  #41  
Old 10-09-2015, 01:36 PM
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Re: Im in love with the ACC

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Originally Posted by protect1989 View Post
I just used my ACC on a trip from Dallas to Austin, roughly 300 miles one way. My average MPG was 27.2. I was extremely impressed with that number. On the way back the average went down to 26.4mpg.

One thing I did notice is that when I was cruising along and the ACC registered the vehicle in front of me, as it went to slow down if I put on my indicator to switch lanes my RPM's would start to rev before I even left the lane. It seems as if the ACC is anticipating being able to accelerate with use of the indicators. Anyone else notice this?
That is a programmed feature. Because when you change lanes, if you don't speed up a bit, you are losing forward distance compared to vehicles going same speed that are not moving diagonally.
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  #42  
Old 10-09-2015, 02:04 PM
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Re: Im in love with the ACC

I opted to not get the ACC on my '14 GC. I don't really use CC and didn't think it was worth the added expense (even with the accident avoidance).

One thing I've noticed when travelling on the highway in heavy (but moving) traffic is cars with ACC tend to tailgate. If the traffic ahead slows down (even slightly), an aware driver not using cruise control (like myself) will ease off on the accelerator in anticipation of the need to slow down. The driver using ACC in this same situation will wait for the ACC to kick in, and since the car is already tailgating, will need to apply the brakes. As soon as the brake lights go on, all cars behind will also react and hit the brakes in a reactionary measure. This actually causes unneeded/exaggerated slowdowns to the flow of traffic.

Drivers should not have to use the brakes to maintain distance when travelling on the highway at highway speeds.
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  #43  
Old 10-09-2015, 02:20 PM
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Quote:
Originally Posted by perpster View Post

That is a programmed feature. Because when you change lanes, if you don't speed up a bit, you are losing forward distance compared to vehicles going same speed that are not moving diagonally.
I don't think this a " program feature".

From what I've read it appears he/is is experiencing the angle of the beam changing.

It seems the beams has a high and a low side.

http://www.extremetech.com/extreme/1...does-it-work/2
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  #44  
Old 10-09-2015, 03:45 PM
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Re: Im in love with the ACC

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Originally Posted by 2zero12wk2 View Post
I don't think this a " program feature".

From what I've read it appears he/is is experiencing the angle of the beam changing.

It seems the beams has a high and a low side.

Page 2 - What is adaptive cruise control, and how does it work? | ExtremeTech
No, it absolutely is a feature. It's in the manual. When you hit your turn signal ACC begins accelerating immediately rather than waiting for you to be out in the next lane.
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  #45  
Old 10-09-2015, 03:51 PM
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Re: Im in love with the ACC

Quote:
Originally Posted by 2zero12wk2 View Post
I don't think this a " program feature".

From what I've read it appears he/is is experiencing the angle of the beam changing.

It seems the beams has a high and a low side.

Page 2 - What is adaptive cruise control, and how does it work? | ExtremeTech
Page 202 of Owner's Manual:

"Overtake Aid

When driving with ACC engaged and following a target
vehicle, the system will provide an additional acceleration
to assist in passing vehicles in front. This additional
acceleration is triggered when the driver utilizes the left
turn signal. In locations with left hand drive traffic,
Overtake Aid is active only when passing on the left
hand side of the Target vehicles.

When a vehicle goes from a location with left hand drive
traffic to a location with right hand drive traffic, the ACC
system will automatically detect traffic direction. In this
condition, Overtake Aid is active only when passing on
the right side of the Target vehicle. This additional
acceleration is triggered when the driver utilizes the right
turn signal. In this condition the ACC system will no
longer provide Overtake Aid on the left side until it
determines that the vehicle has moved back to a location
with left hand drive traffic."
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  #46  
Old 10-09-2015, 03:52 PM
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Re: Im in love with the ACC

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Originally Posted by perpster View Post
Page 202 of Owner's Manual:
You beat me to it! Page 202 of the one I have (eighth edition) as well. Very interesting that it "auto senses" the side of the road you're driving on. I didn't pick up on that the first time through.
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  #47  
Old 10-09-2015, 03:57 PM
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Re: Im in love with the ACC

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Originally Posted by Zhe Wiz View Post
You beat me to it! Page 202 of the one I have (eight edition) as well. Very interesting that it "auto senses" the side of the road you're driving on. I didn't pick up on that the first time through.
The vehicle is smarter than I am!

And, I didn't realize it accelerates to overtake on one side only (for a given side of the road traffic setup).
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  #48  
Old 10-09-2015, 04:07 PM
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Re: Im in love with the ACC

I just love ACC. First time I've had it.

Few things to remember. If someone passes you and pulls back in front of your car the ACC will hit the brakes to restore the distance that you had set originally. That's a little unnerving if your not ready for it.

Interesting note on the lane changing and acceleration. I'm going to try it without the indicator and see how it reacts. Obviously when nobody is in the other lane.

Even with some of it's downsides I'm really glad I have it. My wife loves this feature as well.
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