stop/start

neilmcl

topdaddy wrote: »

Are you always this rude or only when surpassed?

topdaddy wrote: »

The heater wont work like that, it would be stupid to think it would. Your not smart enough for me to talk to any more

What are you saying about being rude. sigh.

topdaddy_2

neilmcl wrote: »

What are you saying about being rude. sigh.

Its a simple enough question, one that could be asked of me too and Id answer honestly

IamNotAllowedToUseMyName

topdaddy wrote: »

Name calling where name calling is due. the heater (clues in the name) will not heat. The fans will turn(running off the battery) but the heater will not warm up(either itself or the cabin air).

I think you are assuming that there is no circulation from the engine block to the heater so that the heater empties of heat more or less immediately.

As I mentioned, Mercedes have been producing cars for a long time that can circulate water around between the engine block and the heater without the engine running. The C class allowed the fan to run for up to 40 minutes after the ignition was switched off (the recirculation button doubled as the switch for the fan to run with the ignition off). In winter, there was significant heat coming out for some time. I don't believe there was any active circulation so presumably there is some sort of bypass to the pump that allows the circulation of the water under typical passive circulation of a hot water system. The heater in the C class was basically fitted under the very small glove box, so towards the top of the engine, so thermal circulation should be quite possible.

So, even without stop start, cars have been designed to run heaters with the engine not running. It is clearly possible to do, and stop/start makes it more necessary to do so.

Could you explain why you think it is impossible to transfer residual heat within the engine and water circulation system into the radiator matrix? Anyway, it does on a current Mercedes C Class BlueEfficiency that I own.

Reading elsewhere a quote from Mercedes (that notes that the heater circuit is separately controlled from the main radiator) says " Thanks to intelligent control, the heating and entertainment systems remain operating during the stop phase for maximum comfort, as does the automatic climate control."

motorguy

topdaddy wrote: »

I disagree with the theory that the heater will blow out hot air. I believe you may have assumed that the heater is on, possibly to maximum, prior to the engine stopping.

No, you assumed it wouldnt be on! The original context was if someone had a heater on and the car went into stop start, would they get cold. The clear answer is no they wouldnt because the car would restart.

IF the car was in stop start mode and you put the heater ON, it would restart if needed to generate heat.

topdaddy wrote: »

However the heater not being on and then switch off the engine and then switching on the heater(fan and temp control) will not result in a warm toasty delightful environment.

Yes it will because the car will restart itself (assuming it stopped in the first place via stop start.

DKLS

DUTR wrote: »

Once you pass the ludite stage, you wonder why other cars don't have it, it seems starnge to be sat at traffic lights for 2 mins with the engine running unnecessarily. In a manula I understand the car has to be in neutral, however it restarts as soon as the clutch is depressed, , some cars the footbrake has to be held on, others as like an auto, as soon as the accelerator is touched the vehicle restarts, I have not come across a situation where it is best disabled yet.

If it was beneficial technology I could accept the luddite argument, but when I had a merc c class and the wives mini the stop start tech added what I considered an unnecessary delay to moving off, Hence the tech has been permanently disabled on our current cars.

The only benefit is some green benefits which I couldn't give a fig about I care more about the health of my engine and auxiliaries.

topdaddy_2

motorguy wrote: »

No, you assumed it wouldnt be on! The original context was if someone had a heater on and the car went into stop start, would they get cold. The clear answer is no they wouldnt because the car would restart.

IF the car was in stop start mode and you put the heater ON, it would restart if needed to generate heat.



Yes it will because the car will restart itself (assuming it stopped in the first place via stop start.

Why would it be on:rotfl:
yeah heaters dont work that way then:rotfl::A

motorguy

topdaddy wrote: »

Why would it be on:rotfl:
yeah heaters dont work that way then:rotfl::A

Are you not on the same planet as everyone else, let alone not being on the same wavelength?

So, the original scenario was, driving along to school to pick up grandson, with heater already on. Park car but keep car running. In this case the stop start would kick in and knock the car off. After a couple of mins, once all the latent heat had dispersed from the heater matrix, the car would not be able to maintain the required cabin temperature and would restart, thus recirculating hot water back to the heater matrix.

Even IF you take the opposite scenario, whereby the heater isnt on, then when the car knocks off and you put the heater on and the car will start again if necessary.

Why is this so difficult for you?

I can understand that maybe you're a bit obtuse and thats ok, but its the arrogance that you seem to think you have in some way got a higher level of knowledge on this that WE are not grasping - yet you have made no attempt to relay that to us, other than to say "heaters dont work that way"

So what way DO car heaters work, if they dont work "that" way?

motorguy

DKLS wrote: »

If it was beneficial technology I could accept the luddite argument, but when I had a merc c class and the wives mini the stop start tech added what I considered an unnecessary delay to moving off, Hence the tech has been permanently disabled on our current cars.

The only benefit is some green benefits which I couldn't give a fig about I care more about the health of my engine and auxiliaries.

I have never noticed any delay on the bmw or vw one - by the time your foot is on the clutch and the car in gear, the car has long since restarted.

topdaddy_2

motorguy wrote: »

Are you not on the same planet as everyone else, let alone not being on the same wavelength
So, the original scenario was, driving along to school to pick up grandson, with heater already on. Park car but keep car running. In this case the stop start would kick in and knock the car off. After a couple of mins, once all the latent heat had dispersed from the heater matrix, the car would not be able to maintain the req in some way got a higher level of knowledge on this that WE are not grasping - yet you have made no attempt to relay that to us, other than to say "heaters dont work that way"

So what way DO car heaters work, if they dont work "that" way?

STOP generalising. You not WE.

atrixblue.-MFR-.

OK so I thought it would give my car a good run today as I normally do (clean out DPF) I put topdaddys theory to the test, I went into local industrial pulled over and stop kicked in killing engine, my car counts how long it sits in stop mode for, it was still hot at 4:59's when auto start kicked in, probably because the temp had lowered to make the engine start itself to maintain the temp in the cabin. sorry topdaddy but even when I manual click the key off then back onto the ignition not starting the car I still get 2 mins of hot before I start to notice its getting cooler out the blowers.