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HI
When driving my jazz ex some times the engine noise gets very loud for about ten mins then goes quite.
The engine is up to temperature and not in ev mode. Any help would be appreciated.
Thank you. Many thanks for all the replies, what I failed to mention the increase in noise does not accompany
an increase in revs.
thanks
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I don’t feel you could have a simple answer. When the engine is called into add power depends on many variables - outside air temperature , temp setting of cabin heating / air on. Temp of battery ( if it’s measured) charge level of HV battery , speed of car and terrain driving in. Use of wipers . . I just trust the technology to always optimise the use of the petrol engine . It’s clever tech
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I know the topic is about a bit different, but do you hear a quiet high-frequency whistle/sound in the cabin when the internal combustion engine is running? I can also hear it slightly when driving electric, but definitely more when driving on gasoline....
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No, just loud engine noise.
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HI
When driving my jazz ex some times the engine noise gets very loud for about ten mins then goes quite.
The engine is up to temperature and not in ev mode. Any help would be appreciated.
Thank you.
I think you have to get used to the idea that you, as the driver, do not control the engine speed. It’s not like in a conventional ICE car where you press the accelerator and the engine runs faster. The computer decides when the engine will run depending on the demand, and it will run at it’s most efficient speed ... which may be faster (ie louder) than you expect. So if you’re tootling along at low speed and the computer decides the battery needs to be charged, the engine will kick in and run at a higher speed than you might expect for that roadspeed.
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I've never experienced any unexpected engine noise.
There have been a couple of occasions I've floored it from a standing start and the noise, has been what I would expect from any engine.
In the main though I drive sedately and the only time I hear the engine is in my driveway. Once I'm on the move I rarely notice it.
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As this is my first hybrid AND auto gearbox, it has taken me 7k to get used to a different way of driving. The engine does respond in a different way, and sometimes sounds like its high revving... almost like you're clutch slipping. A couple of times I have put my foot down too heavily and the revs increase dramatically before catching up with itself. I have also now experienced that algorithm with the revs that Honda built in to make it sound like the gears are changing (pointless).
I think what Travis means though, is that sudden engine noise that kicks in for no reason that the driver has intended. Again, like the others have mentioned.. I now accept the engine configuration is doing what it needs to to to optimise performance and efficiency. I only really notice it at slow speeds, when I am using things that drain the battery quickly too often.
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I find the revs are greatest after approaching a steep uphill section with the battery at 20 or 30%, then the engine has to supply all the electrical energy for climbing the hill, it's worst if travelling at higher speeds (eg motorways).
Generally it can be avoided just by being gentle on the accelerator, not really an issue overall.
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Like the others I find if you floor it the engine can be louder for a short time, and occasionally does it without driver input, for no obvious reason. Also if you have heating or aircon operating you can sometimes hear the fans etc running. Could that be the constant whistle referred to? Conventional cars also make this fan noise except its normally unnoticed among general engine noise. .
Anyone thinking of buying a mk 4 should not be concerned that its going to be noisy. Any extra engine noise is usually no worse than a normal car would always be making in similar circumstances .You might notice it more because the mk4 car is usually so quiet. Sometimes almost eerily quiet.
As others have said sometimes ,if the car is having to work hard , on a long steep hill for instance, the engine may start itself and run faster and more noisily than you might expect or would normally drive a car. . But its not that often and might even startle you the first time it happens to you. There is nothing wrong , it rarely lasts long and the car will reduce the revs as soon as it can. Sometimes you can get it to quieten down immediately with no noticeable loss in progress by coming off the throttle slightly. Possibly also by switching off heating/aircon.
For me this occasional engine racing its a small price to pay to have a car thats so economical on fuel and so quiet and refined the vast majority of the time.
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A friend has recently got a mk4, going from a Peugeot diesel. He has noted (complained?) about the engine noise when accelerating hard.
I explained that it's because when you demand max power the technology is there to provide it .... straight away. He is used to the engine speed and noise building up as the car accelerates. The hybrid Jazz engine will go directly to max power output and stay there while the demand persists.
In my years in engine development it never ceased to amaze me just how noisy engines are at max power. When you hear and see one on a test bed you wonder why anyone happily sits a couple of feet behind one in a car without thinking it's about to blow up. A 500+bhp twin turbo V8 at full chat is quite a fearsome thing when you can see and hear it. On a motorbike you have the engine between your legs!
Try red-lining a "normal" car through the gears and see what it sounds like, that's what the mk.4 Jazz does in effect.
Obviously to some this will be intrusive and/or offensive, and it may or may not be deemed "acceptable". I know manufacturers go to considerable lengths to mitigate the noise in the cabin but inevitably noise suppression is a compromise of what is achievable with cost and weight taken into account. I suppose the full answer is pure EV with no engine.
Does anyone notice electrical system whine? You can get various sorts of whining type noises from control systems/inverters/motors etc.
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When I worked for Shell I saw a few engines running on computerised test programmes and they were inside a so called sound proof cell. A big ICE at full chat defeated the sound proofing!
I would agree that most manufacturers attempt to fit sufficient sound deadening. However, after owning 8 Hondas, I have come to the conclusion that the Japanese enjoy excessive road, wind and engine noise on most models. My HR-V e:HEV was very noisy and now I am driving a CR-V SR e:HEV it is much quieter than the HR-V but still too much tyre roar, which is, I am sure, in the main, down to the cr@p road surfaces we have in the U.K.
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As this is my first hybrid AND auto gearbox, it has taken me 7k to get used to a different way of driving. The engine does respond in a different way, and sometimes sounds like its high revving... almost like you're clutch slipping. A couple of times I have put my foot down too heavily and the revs increase dramatically before catching up with itself. I have also now experienced that algorithm with the revs that Honda built in to make it sound like the gears are changing (pointless).
I think what Travis means though, is that sudden engine noise that kicks in for no reason that the driver has intended. Again, like the others have mentioned.. I now accept the engine configuration is doing what it needs to to to optimise performance and efficiency. I only really notice it at slow speeds, when I am using things that drain the battery quickly too often.
there isn't an automatic gearbox - it is direct electric motor drive until +/- 70 mph then direct enging drive.
heard a noisy engine - try being in test cell with a Merlin at full belt, your insides vibrate!
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.../... it is direct electric motor drive until +/- 70 mph then direct enging drive.
I'm sorry to say it, but that's not true... Check out this explanation:
From 6:25 you can see the division EV drive, Hybrid drive and Engine drive (> 75 mph its 100% hybrid mode).
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If you think ICE's are bad I recall an airshow many years ago when a Vulcan Bomber flew low over the crowd.
It was still an operational RAF aircraft at the time and before the increased airshow crowd safety regulations.
OMG . It didnt need to drop bombs to to shock and awe populations into immediate surrender. :o
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He is correct in saying there is no automatic gearbox.
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That's why I responded to (and quoted) only this ;):
.../... it is direct electric motor drive until +/- 70 mph then direct enging drive.
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The Honda explanation is an outline reallly to explain the users of the car new to the hybrid idea . When the petrol engine connects to the drive still depends on the load required . At 90 mph you can still be in direct mechanical drive and the electric motor can add to that power . However if you go up hill on a motorway at 60 and floor the accelerator the mechanical drive will disingage as the system then needs the electric power from the generator to match the demands of electric motor which will try and take the battery HV energy if it can . The controlling PCM system is far more sophisticated than anything simply speed related!
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That's why I responded (and quoted) only this ;):
.../... it is direct electric motor drive until +/- 70 mph then direct enging drive.
Not sure what you mean but all drive until approx 70mph is via electric drive, even if engine running surely
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At 6:27 it shows over 70 to be hybrid only, not just engine
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Interesting point about sound insulation and Japanese roads. I find the Mk4 very quiet, and even flooring it is not really noisy, just the same kind of accel noise you'd get in a gearbox ICE taking it to high revs, and even then pretty muted. Perhaps just more noticeable because of the normal quietness.
I do find a difference in roads though, in electric mode and very noticeable in the E the quite "roar" of tyre noise is the sound you hear until you come to a section of road near here where brand new soft tarmac has been laid for a few hundred yards. Then there is almost an eerei silence, literally no noise at all, then the normal concrete mix starts again and the tyre noise coming back in is quite alarming because so very noticable after such "floating" silence. I wonder if that road ride in Japan is much better and the UK therefore needs special sound insulation? :(
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I know in Austria they make the effort in Urban areas to surface motorways with 'whisper' tarmac. It makes a big difference in noise levels for the car and nearby residents. I suppose it comes at a cost.
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In the year 2020 a book was published in the Netherlands:
The miracle of ZOAB. History of a 'silent innovation'.
Dutch motorways are considered the safest and most comfortable roads in the world. The acclaimed status of Dutch roads is largely due to Very Open Asphalt Concrete (ZOAB), which has been used on almost the entire main road network. It is relatively quiet, safe and comfortable.
'The miracle of ZOAB' tells how ZOAB was developed, from the first experiments on Dutch motorways in the 1970s to the breakthrough of ZOAB in the late 1980s and its massive application in the 1990s.
ZOAB was developed to improve road safety during rain and broke through when the top layer also turned out to be much quieter.
Source: https://www.linkedin.com/pulse/het-wonder-van-zoab-geschiedenis-een-stille-innovatie-burg-van-der
Noise reduction from 2.5 dB at low speeds to around 6 dB at high speeds.
Edit: The Netherlands and Japan are the only two countries in the world where Very Open Asphalt Concrete (ZOAB) is used on almost all roads.
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As this is my first hybrid AND auto gearbox, it has taken me 7k to get used to a different way of driving. The engine does respond in a different way, and sometimes sounds like its high revving... almost like you're clutch slipping. A couple of times I have put my foot down too heavily and the revs increase dramatically before catching up with itself. I have also now experienced that algorithm with the revs that Honda built in to make it sound like the gears are changing (pointless).
I think what Travis means though, is that sudden engine noise that kicks in for no reason that the driver has intended. Again, like the others have mentioned.. I now accept the engine configuration is doing what it needs to to to optimise performance and efficiency. I only really notice it at slow speeds, when I am using things that drain the battery quickly too often.
there isn't an automatic gearbox - it is direct electric motor drive until +/- 70 mph then direct enging drive.
I know how it works, but it is easier to say 'auto'.. especially as it has P N R D B and it is not a conventional stick shift.
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I don't get why Honda have built in pseudo gear change noises. I prefer the one gear.
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It doesn't bother me, I just wonder why it never downshifts... (https://www.cheesebuerger.de/images/smilie/konfus/a015.gif)
(https://www.cheesebuerger.de/images/smilie/verschiedene/e025.gif)
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Not sure what you mean but all drive until approx 70mph is via electric drive, even if engine running surely
In my experience, direct drive kicks in between 50mph and 70mph, exactly the same as when you'd be using 5th gear on a manual car.
If the load is light, eg. cruising on a relatively flat motorway, the car will usually cycle between pure electric drive and direct drive with charging.
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exactly the same as when you'd be using 5th gear on a manual car.
I am always in 5th by 30 mph both with the Jazz and now the Fabia. The DSi Jazz was able to pull smoothly in 5th from about 20 mph on a flat road.
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exactly the same as when you'd be using 5th gear on a manual car.
I am always in 5th by 30 mph both with the Jazz and now the Fabia. The DSi Jazz was able to pull smoothly in 5th from about 20 mph on a flat road.
Yes, I could go into 5th at 30mph in my Mk2. The engine tolerated it, but I don't think it was good for it.
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The facelift version of the Mk4 has a "revised drive system” according to Honda but no one seems to know what that means or what effect it will have on the car. It is supposed to have more power and I suspect that Honda’s response to the engine noise criticism has to be to modify the drive train to reduce the ‘surging’ and sudden increase in engine noise discussed in this thread. Of course until the revised versions are available and we have comparative road tests we won’t know. Hopefully it won’t be long now till we can hear about the differences from owners and road tests.
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I find it odd that some are finding intrusive engine noise whilst I can't detect when my engine turns on or off when on the move.
I display the instant mpg bar and the only way I know is by looking at that bar.
Strange.
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At 6:27 it shows over 70 to be hybrid only, not just engine
Yes I have experienced that briefly too, but depends on other load factors, I think the presentation is based on certain ideal circumstances picked to show perfect cycles. I did state +/-70mph, approximate.
But like others, i just accept that the tech and Honda engineering has done a great job.
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I find it odd that some are finding intrusive engine noise whilst I can't detect when my engine turns on or off when on the move.
I display the instant mpg bar and the only way I know is by looking at that bar.
Strange.
It’s the surging - sudden high revs - that can be disturbing. Just a factor of the drive train but if Honda can reduce the tendency to surge then it would be a move forward.
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I agree, on 30mph normal urban driving it is dificult to tell if the engine has cut in to charge up and I need the little green EV to disappear from the display to tell. You only hear it when pressing the throttle for a surge in accelleration or suddenly going uphill. Light throttle driving away from e.g. traffic lights you can't tell. Have the radio on and it is much harder.
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Since we are talking about engine noise. I try to remember (https://em-content.zobj.net/thumbs/120/sony/336/thinking-face_1f914.png) what it was like, that engine noise in the good old days when I drove an old fashioned manual car....
Just one example: Quickly merging onto the motorway on a short slip lane. Full throttle and acceleration through some three (or four?) gears...(https://em-content.zobj.net/thumbs/120/sony/336/hear-no-evil-monkey_1f649.png)
What do we complain about... that we sometimes hear that there is also an ICE under the hood?
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Part of the problem is its quite possible to always drive with quite reasonable performance below the level when you may get these Engine surges. Some on here own the car for a long time before finally experiencing the 'quasi gear change' effect when accelerating hard for instance . I sometimes drive quite 'enthusiastically' and climb a lot of mountains . The engine may run quite fast, but I can count on one hand how often it has run anywhere near maximum revs, and then not for long. I often thrashed an engine harder than this in my younger days. :-[ :P Its more a surprise than anything to be concerned or annoyed about IMO. Once you accept it for what it is ,and maybe explain to unfamiliar passengers " 'dont worry, they all do that ,and by the way those occasional bleeps and steering wheel warnings on the dashboard are not due to my bad driving" its much easier to tolerate the rare intrusions into the normal silence.
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Mine is quieter than my 9G Civic auto at all speeds.
Those with the engine noise, are these MY21 models and therefore could my MY22 have seen a change as I have nothing to complain about.
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There was a post about engine noise like a ‘bag of spanners’ before I got my new car in November last year . Someone even returned their new car, rejected other new ones they drove and got a different car. My car 2023 model been perfect
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Around about the year 2000, I attended a Hewlett Packard seminar in Munich. At that time, they were in a sponsorship agreement with a Formula One team. They brought an F1 engine on stage in a test bed and started it up. The noise was unbelievably deafening.
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There was a post about engine noise like a ‘bag of spanners’ before I got my new car in November last year . Someone even returned their new car, rejected other new ones they drove and got a different car. My car 2023 model been perfect
It was me 😂😂