Civic hybrid 06 driving technic summary thread
#121
Re: Civic hybrid 06 driving technic summary thread
Originally Posted by NASAgineer
We really need better terminology for the HCH-II because people have been using the term 'EV mode' to mean several different things. I like Stephane's term, Zero Fuel Glide (ZF-Glide for short?). Even in ZF-Glide, there are three different modes.
1- ZF-Glide with regen.
2- ZF-Glide with NO regen or assist.
3- ZF-Glide with assist.
1- ZF-Glide with regen.
2- ZF-Glide with NO regen or assist.
3- ZF-Glide with assist.
1- ZF-Glide with regen = ZFG-R (R = regeneration)
2- ZF-Glide with NO regen or assist. = ZFG-N (as in N = neither or none or neutral)
3- ZF-Glide with assist. = ZFG-A (A = assist)
#122
Re: Civic hybrid 06 driving technic summary thread
Originally Posted by DigitalMan
"If you are city driving, go ahead and use as much assist as you can (up to 4 or 5 bars). Whatever battery you are using in city driving, you will be able to refill it using breaking."
Last edited by NASAgineer; 12-21-2005 at 12:38 PM.
#123
Re: Civic hybrid 06 driving technic summary thread
Hi All,
wow, lotsa good feedback. Digital Man, I fixed the "broken" braking! Sorry, English isn't my mother tongue.
As for using assist / not using assist, two sources of great information:
- Geoffrey (the first HCH-II hypermiller!) usese swift accelration at 2.5k-3k RPM for the city portion and then, a constant 1k RPM afterwards. It is very unlikely that you can accelerate in D at 2.5k-3k without assist from a standstill.
- While accelerating back from a glide, it seems that using assist to get back to speed had the best fuel efficiency (as per NASAngineers experiments)
As NASA said, it's all about using it wisely. In a purely city driving context, the battery will be able to stay at a resonable level throughout the trip.
As for the for terminology, I'm all for it. We can define all three if we need to. No harm there!
Thanks,
Stephane.
wow, lotsa good feedback. Digital Man, I fixed the "broken" braking! Sorry, English isn't my mother tongue.
As for using assist / not using assist, two sources of great information:
- Geoffrey (the first HCH-II hypermiller!) usese swift accelration at 2.5k-3k RPM for the city portion and then, a constant 1k RPM afterwards. It is very unlikely that you can accelerate in D at 2.5k-3k without assist from a standstill.
- While accelerating back from a glide, it seems that using assist to get back to speed had the best fuel efficiency (as per NASAngineers experiments)
As NASA said, it's all about using it wisely. In a purely city driving context, the battery will be able to stay at a resonable level throughout the trip.
As for the for terminology, I'm all for it. We can define all three if we need to. No harm there!
Thanks,
Stephane.
#124
Re: Civic hybrid 06 driving technic summary thread
Originally Posted by NASAgineer
I guess that would be true if you really could always just coast to stop and never incur any regen, but the vast majority of people will incur some regen without even trying in normal day-to-day driving. A good example is a stop sign at the bottom of a hill. There's no way you can go down that hill and stop at the sign without getting some regen. There are obviously many more examples of inevitable regen. In those cases it makes sense to USE the electrical power that you got from the regen. Everything you say about the inefficiencies in the electrical conversions is completely true, which is why you should adjust your use of assist based on the current battery level (anything above 5 bars can be used for 'free' without incuring any forced regen). Another way of putting it is to try to only use assist that is the product of inevitable regen.
#125
Re: Civic hybrid 06 driving technic summary thread
Originally Posted by slajeune
Digital Man, I fixed the "broken" braking! Sorry, English isn't my mother tongue.
As for using assist / not using assist, two sources of great information:
- Geoffrey (the first HCH-II hypermiller!) usese swift accelration at 2.5k-3k RPM for the city portion and then, a constant 1k RPM afterwards.
As for using assist / not using assist, two sources of great information:
- Geoffrey (the first HCH-II hypermiller!) usese swift accelration at 2.5k-3k RPM for the city portion and then, a constant 1k RPM afterwards.
As my neighbor with a new Ferrari points out, "swift acceleration" is a relative term in a car that goes 0-60 in 10+ seconds, but I get the idea.
#126
Re: Civic hybrid 06 driving technic summary thread
Originally Posted by DigitalMan
Agreed. My interest is more about the efficiencies of accelerating from a stop than about ZFG. Best to accelerate with assist or to try to avoid it? Perhaps that will depend on whether you think you can get some "free" regen back once you get moving. Is assist in accelerating more efficient than without assist or does assist during acceleration just consume electricity to accelerate faster?
#127
Re: Civic hybrid 06 driving technic summary thread
I think "assisted glide" or "extended glide" are good words for it. The car always coasts without using gas (unless your speed is really low) so zero-fuel glide isn't the best term IMO.
Since you can't accelerate in this mode, and you have to already be gliding (zero fuel consumption) in order to activate it, it's just a way of extending that glide or assisting it... so I like those terms.
Since you can't accelerate in this mode, and you have to already be gliding (zero fuel consumption) in order to activate it, it's just a way of extending that glide or assisting it... so I like those terms.
#128
Re: Civic hybrid 06 driving technic summary thread
Originally Posted by CGameProgrammer
I think "assisted glide" or "extended glide" are good words for it. The car always coasts without using gas (unless your speed is really low) so zero-fuel glide isn't the best term IMO.
Since you can't accelerate in this mode, and you have to already be gliding (zero fuel consumption) in order to activate it, it's just a way of extending that glide or assisting it... so I like those terms.
Since you can't accelerate in this mode, and you have to already be gliding (zero fuel consumption) in order to activate it, it's just a way of extending that glide or assisting it... so I like those terms.
Assisted glide. (AG)
Neutral (i.e. non-assist, non-regen) glide. (NG)
Regenerative glide. (RG)
should do it. The ZF doesn't tell us much.
#129
Re: Civic hybrid 06 driving technic summary thread
Originally Posted by CGameProgrammer
I think "assisted glide" or "extended glide" are good words for it. The car always coasts without using gas (unless your speed is really low) so zero-fuel glide isn't the best term IMO.
Since you can't accelerate in this mode, and you have to already be gliding (zero fuel consumption) in order to activate it, it's just a way of extending that glide or assisting it... so I like those terms.
Since you can't accelerate in this mode, and you have to already be gliding (zero fuel consumption) in order to activate it, it's just a way of extending that glide or assisting it... so I like those terms.
#130
Re: Civic hybrid 06 driving technic summary thread
Originally Posted by ElanC
I agree.
Assisted glide. (AG)
Neutral (i.e. non-assist, non-regen) glide. (NG)
Regenerative glide. (RG)
should do it. The ZF doesn't tell us much.
Assisted glide. (AG)
Neutral (i.e. non-assist, non-regen) glide. (NG)
Regenerative glide. (RG)
should do it. The ZF doesn't tell us much.