Slow acceleration vs. Fast IMA-assisted acceleration
#1
Slow acceleration vs. Fast IMA-assisted acceleration
Does anyone know which is better? I've tried both but I have no idea which would be better for gas-savings. On one hand, mashing the petal puts the charge to use as the IMA is used more to get the car to cruising speeds. On the other, slow acceleration is the more efficient way to get to cruising speeds in gas-only cars.
#2
Re: Slow acceleration vs. Fast IMA-assisted acceleration
My two yen on the subject:
In my own personal experience, that may be different from that of other members, is that one should engage the IMA as fully as possible (without actually going pedal-to-the-metal) to accelerate. When you reach your desired speed, use the coasting methods described in this forum.
In my own personal experience, that may be different from that of other members, is that one should engage the IMA as fully as possible (without actually going pedal-to-the-metal) to accelerate. When you reach your desired speed, use the coasting methods described in this forum.
#3
Re: Slow acceleration vs. Fast IMA-assisted acceleration
Originally Posted by Inigo Montoya
Does anyone know which is better? I've tried both but I have no idea which would be better for gas-savings. On one hand, mashing the petal puts the charge to use as the IMA is used more to get the car to cruising speeds. On the other, slow acceleration is the more efficient way to get to cruising speeds in gas-only cars.
The reality in the HCH is that it's fairly impractical to accelerate from a stop with absolutely no assist. You can only accelerate VERY slowly without assist.
My rule of thumb, for better or worse, is to use no more than three bars of assist for acceleration whenever possible. It prevents the ICE from going into the high rev range.
#4
Re: Slow acceleration vs. Fast IMA-assisted acceleration
Using full assist with low ICE will use up the battery very quickly. Full assist with full ICE (flooring it) is better for the battery but is worse in the short term, if not the long term, since the ICE is inefficient when used that way.
There is a sweet spot and others have reported it at around 2000 rpm. Accelerating with the engine at 2000 rpm, on level roads at least, sounds optimal.
There is a sweet spot and others have reported it at around 2000 rpm. Accelerating with the engine at 2000 rpm, on level roads at least, sounds optimal.
#5
Re: Slow acceleration vs. Fast IMA-assisted acceleration
Originally Posted by CGameProgrammer
Using full assist with low ICE will use up the battery very quickly.
#6
Re: Slow acceleration vs. Fast IMA-assisted acceleration
Originally Posted by ElanC
How can you produce full assist with low ICE utilization?
#7
Re: Slow acceleration vs. Fast IMA-assisted acceleration
I don't have the equipment, but is it possible to hook something up to the OBD-II to read fuel load over time, such that one can do both a slow and quick acceleration to speed to see which is more fuel efficient?
Jeff
Jeff
#8
Re: Slow acceleration vs. Fast IMA-assisted acceleration
Originally Posted by CGameProgrammer
By "low" I was speaking relatively. Applying moderate pressure to the gas pedal can result in full assist while the engine is at 3000 rpm or so. Low compared to the 5000 rpm it runs at if one were to floor it.
#9
Re: Slow acceleration vs. Fast IMA-assisted acceleration
Hi;
I wonder has anyone ran their HCH ll wide open, Gas Pedal On The Floor with Full IMA Assist? Battery Pack Fully Charged.
If so how does it perform?
I'm not looking for a {Knock-Down} fight on why you don't do that with a Hybrid. It is simply a question to anyone that has tried their HCH ll out to see if they could get out of Harms-Way if an Emergency Situation called for it.
Example: Like a Tractor Trailer truck Running up Behind You:
Thanks;
Terry
BTW: Please lets not go off the Deep End on this, it's just a {Question}.
I wonder has anyone ran their HCH ll wide open, Gas Pedal On The Floor with Full IMA Assist? Battery Pack Fully Charged.
If so how does it perform?
I'm not looking for a {Knock-Down} fight on why you don't do that with a Hybrid. It is simply a question to anyone that has tried their HCH ll out to see if they could get out of Harms-Way if an Emergency Situation called for it.
Example: Like a Tractor Trailer truck Running up Behind You:
Thanks;
Terry
BTW: Please lets not go off the Deep End on this, it's just a {Question}.
Last edited by tigerhonaker; 01-23-2006 at 08:31 PM. Reason: Added Tractor Trailer Truck, as an examp;
#10
Re: Slow acceleration vs. Fast IMA-assisted acceleration
Originally Posted by tigerhonaker
Hi;
I wonder has anyone ran their HCH ll wide open, Gas Pedal On The Floor with Full IMA Assist? Battery Pack Fully Charged.
If so how does it perform?
I'm not looking for a {Knock-Down} fight on why you don't do that with a Hybrid. It is simply a question to anyone that has tried their HCH ll out to see if they could get out of Harms-Way if an Emergency Situation called for it.
Thanks;
Terry
BTW: Please lets not go off the Deep End on this, it's just a {Question}.
I wonder has anyone ran their HCH ll wide open, Gas Pedal On The Floor with Full IMA Assist? Battery Pack Fully Charged.
If so how does it perform?
I'm not looking for a {Knock-Down} fight on why you don't do that with a Hybrid. It is simply a question to anyone that has tried their HCH ll out to see if they could get out of Harms-Way if an Emergency Situation called for it.
Thanks;
Terry
BTW: Please lets not go off the Deep End on this, it's just a {Question}.