Clubjazz - Honda Jazz & HR-V Forums
Honda Jazz Forums => Honda Jazz Mk2 2008-2015 => Topic started by: MartinJG on January 13, 2018, 03:58:58 PM
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I know the Mk2 engine is designed to produce more power at higher revs and models from @2010 were offered with cruise control but does the engine produce enough torque at the legal limit (plus a bit) to maintain speed comfortably on gradients with a load on board (say four adults and baggage) or does it struggle? I ask because my Mk1 gets the vapours on hills and tends to slip back to @60MPH where it hangs on grimly which is not surprising as this is where it produces optimum torque. Not ideal for cruising though.
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My personal opinion is that Cruise Control on a manual gear change is only ever second best!
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This post got me thinking back to my Cornwall trip back in September. The A30 has some serious gradients on it and I must admit I didn't use cruise on these but what I do know is that I started to lose speed more than once and got the change down indicator on a few occasions - one hill I dropped down to third.
It made me think the car might have stalled had it been in cruise control!
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It made me think the car might have stalled had it been in cruise control!
Don't know if the Jazz one will, but on other cars the cruise control has disconnected if the engines speed became too low. So, I don't think that it would.
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Cruise control works fine for me, having a CVT gearbox, even down to below 30 mph, which I find very useful in urban areas, when I don't need to keep my eye on the speedo all the time.
It will also maintain the required speed on motorway hills, all that happens is the ratio changes and engine speed increases to suit the additional load.
I can well understand that these details may not apply to manual gearbox versions, where you would obviously have to change gear to maintain momentum.
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I regularly travel between Launceston and Fraddon on the A30 and when I can I use Cruise Control. Never thought about the hills it just seems to get on with it. The only question I have is going down the hill at a place called Palmers Bridge ( Jamaica Inn is the next hill) the car will run apparently hold back at 70mph in Cruise Control. I asked Honda about it and after months of correspondence basically they either don't know or can't be bothered. At the moment the A30 is back to single lane and will be until March so that Kier can finish the job that was supposedly finished last June. That rules out Cruise Control because of Lorries.
As for losing speed, passing the Jamaica Inn going West, I find that I have to keep lifting my foot otherwise I am rocketing up the hill at 80 plus in 6th. Going the other way, I often use the flappy paddles to change down and selecting 4th will take me over the top at 70mph. If I leave it in Cruise Control it does drop back a bit. and leaves me in the situation of white van man boxing me in because they run out of steam halfway up the hill.
Having Ishift might be the difference but all I know is the little old box of tricks under the bonnet will fly.
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Yes - the auto boxes (CVT or I shift) would sort out any problems with hills by selecting an appropriate ratio.
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Thanks for the feedback. I think cruise control is brilliant if it works OK with the power unit, be it in town at 30MPH or on long boring stretch of motorway. The autos in their various guises obviously make the necessary adjustments, well, automatically. I am more interested in the manual versions really. Nobody really wants to find themselves having to shift down a gear on an ordinary five speed box if poss.
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Cruise control (non adaptive) is fine when you have road to yourself and may be designed more for places like USA and Australia than UK with our busy roads. I have stopped using it except maybe in motorway roadworks with 50 limit and average speed cameras. On majority of roads in UK there is such a variation in speeds people thing is OK ( some think 35 in 60 limit is fine) that i was always tapping buttons to try and match speed to traffic and basically it was a waste of time and too fiddly.
Also on fuel saving cruise control will maintain set speed on uphill where correct thing is to allow speed to drop a bit if you want best mpg, and on downhill better to leave accelerator alone and use highest gear on overrun to maintain speed on closed throttle. A careful driver can get better mpg with cruise control off than by having it on.
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I had cruise control on my automatic Volvo S40, and I used it virtually all the time. Great for not exceeding 30 and 40 mph speed limits. Not the best for the maximum mpg, but that didn't trouble me with the Volvo.
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Hi
I have an AA car genie fitted and here is a pic of a short journey in Essex at a busy time with cruise control on, Honda jazz si 5 speed manual
Many thanks
John(https://uploads.tapatalk-cdn.com/20180114/e857aa8ada9054fed98d984b8f6b31f1.jpg)
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If I'm away from the crowded areas of the UK then the cruise control gets used, so M6 south if south of the Thelwall Viaduct then it's almost pointless except for the average speed cam areas, north of it I'll set it and 170 odd miles later knock it off as it's time to come off the motorway.
I'm not bothered about saving a few pence on fuel, on a 6 hours journey, much rather spend a little extra by having the cruise control active, and stopping the possibility of a £60 financial hit.
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Cruise control (non adaptive) is fine when you have road to yourself and may be designed more for places like USA and Australia than UK with our busy roads. I have stopped using it except maybe in motorway roadworks with 50 limit and average speed cameras. On majority of roads in UK there is such a variation in speeds people thing is OK ( some think 35 in 60 limit is fine) that i was always tapping buttons to try and match speed to traffic and basically it was a waste of time and too fiddly.
Also on fuel saving cruise control will maintain set speed on uphill where correct thing is to allow speed to drop a bit if you want best mpg, and on downhill better to leave accelerator alone and use highest gear on overrun to maintain speed on closed throttle. A careful driver can get better mpg with cruise control off than by having it on.
Completely agree with this. I like to have cruise control but I use it sparingly. The key advantage for me is to give the right leg a break from time to time but I am always on tenterhooks wondering if I'll need to brake. Adaptive cruise is what you really need on UK roads.
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I am always on tenterhooks wondering if I'll need to brake.
Why are you on tenterhooks? If you need to brake, you brake. Touching the brake pedal immediately cancels cruise control.
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I am always on tenterhooks wondering if I'll need to brake.
Why are you on tenterhooks? If you need to brake, you brake. Touching the brake pedal immediately cancels cruise control.
No - I realise that. My concern is the slight feeling that you are not fully in control. Difficult to explain but another aspect of this is where you put your right foot. If you want to rest it you will either have it to the right of the accelerator pedal or drawn back. Either way there will be a slight delay in braking. Some people "cover" the brake pedal in cruise but that, for me anyway, defeats the object.
I only use the cruise if I am on a relatively sparsely populated stretch of road. I'm not alone in this. I know a number of people who don't use cruise control at all. My brother never used his until he got adaptive.
Just to add in support of Culzeans post - the last time I drove in the USA was 10 years ago. On a trip from Boston up to Burlington in Vermont I had cruise on virtually the whole time but the traffic was very light.
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I had a FIAT 126 with an auxiliary hand throttle. That is scary!
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I have only had Cruise Control on two vehicles one with a 'proper' auto box and the Honda I shift. Having a damaged right knee it is a very helpful where it can be used. I can honestly say I have never had my foot hovering over the brake pedal. After all whatever you are driving, one should be prepared to brake when necessary. So whether it's in cruise control or not it is you that is the brakeman. Once you touch the brake the Cruise Control is over ridden. You have to reengage it after braking.
One question. How does it work with a manual box, if an incline needs a change of gear?
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Hi
I use cruise control every day even at its lowest on setting - circa 25mph
I find it easy and if traffic in front getting close, I use cancel to slow down before using brakes, if gap opens up, I use resume button to take me back to same speed
On hills, the higher speed in cruise control works better then lower speeds but it still loses its speed inline with the steepness of the hill. On a motorway at 80mph, it maintains speed on hills however at 40mph on a hill, it will lose speed but does not sound to labour.
I live in a hilly place, infact, I live half way down a very steep hill, so when first setting off, no cruise control until around 30mph, then it goes on and works very well
As a driver, I never hover over the brake pedal, just use cancel/resume buttons mostly, unless traffic is stopping. Just the same as driving without cruise control, you have to aware of traffic and what’s around you
Incidentally, i bought car genie because in the event of a accident/crash, it alerts the AA who then are meant to ring you so as I travel alone a lot, it may save my life if
Many thanks
John
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I have only had Cruise Control on two vehicles one with a 'proper' auto box and the Honda I shift. Having a damaged right knee it is a very helpful where it can be used. I can honestly say I have never had my foot hovering over the brake pedal. After all whatever you are driving, one should be prepared to brake when necessary. So whether it's in cruise control or not it is you that is the brakeman. Once you touch the brake the Cruise Control is over ridden. You have to reengage it after braking.
One question. How does it work with a manual box, if an incline needs a change of gear?
It's a matter of personal taste. I was reading about this last night in the light of various comments and there is a view that cruise, in heavy traffic, can slow reaction time just that little bit - the right foot, on a manual, has further to move. That makes me feel insecure and it's why I won't use cruise in heavy traffic. Indeed there is a view amongst experts that you shouldn't use it in heavy traffic. The only exception I make to this are when I'm in a lengthy 50 mph stretch on the motorway - I compensate for the extra braking time by lengthening my following distance.
There's a wider issue over cruise and increasing automation generally as we move to more assisted driving. The more tasks are removed from the driver, the more likely his/her attention is likely to wander according to some road safety experts.
That said, I hope my next car has adaptive cruise! I would use that much more frequently.
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That said, I hope my next car has adaptive cruise! I would use that much more frequently.
My new car has adaptive cruise control and it is truly awesome in conjuction with the CVT transmission.
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Thanks for the tip Richard - something to bear in mind come car change time.
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Don't want to harp on about it as it's not a Honda! Suffice to say I miss it when I drive my Jazz.
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The only exception I make to this are when I'm in a lengthy 50 mph stretch on the motorway - I compensate for the extra braking time by lengthening my following distance.
If everyone used cruise control in heavy traffic, that's flowing freely, then I think it would make it safer assuming they follow your example.
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I have only had Cruise Control on two vehicles one with a 'proper' auto box and the Honda I shift. Having a damaged right knee it is a very helpful where it can be used. I can honestly say I have never had my foot hovering over the brake pedal. After all whatever you are driving, one should be prepared to brake when necessary. So whether it's in cruise control or not it is you that is the brakeman. Once you touch the brake the Cruise Control is over ridden. You have to reengage it after braking.
One question. How does it work with a manual box, if an incline needs a change of gear?
In my experince, (Octavia) it normally disengages when you depress the clutch but I usually just touch the breaks first to avoid messy rev issues.
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Having just read a link on Cruise Control, I feel it explains it very well.
Go to Jazz Mk 1 and look under the Question re the 08 CVT, on page 3 Culzean has a link explaining the CVT and at the bottom of the CVT piece is another link on Cruise Control and it's use in the wet ( this is a misnomer and is explained) It explains the Cruise Control extremely well.
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Having just read a link on Cruise Control, I feel it explains it very well.
Go to Jazz Mk 1 and look under the Question re the 08 CVT, on page 3 Culzean has a link explaining the CVT and at the bottom of the CVT piece is another link on Cruise Control and it's use in the wet ( this is a misnomer and is explained) It explains the Cruise Control extremely well.
links for cruise control (go to bottom of page in link for other articles about cruise control ).
https://practicalmotoring.com.au/car-advice/what-is-cruise-control-how-does-it-work/
and CVT how it works.
https://practicalmotoring.com.au/car-advice/continuously-variable-transmission-explained/