stop/start

colino

Even with the weight of the bigger battery and allegedly beefier starter motors, there don't appear to be any major, common failures popping up. VAG Greenlines don't even appear to let you switch them off interrogating the ecu (obviously a deliberate block because you can with other models). Only two failures that could possibly be attributed to start/stop were on two very high mileage Octavias. The problem on each was the starting gear teeth on the flywheel literally wearing out causing embarrassing non-starts. Labour heavy fix too.

gilbert_and_sullivan

topdaddy wrote: »

The heater cannot work like that. The fans will work the heater wont as the coolant will not be circulating. That happens when the engine is running.fact. made your selves look silly. Pure mse.

The heater radiator doesn't cool instantly, the fan will blow the diminishing warmth out of the heater rad, probably take 2minutes depending on the temp.

If you turn your engine off manually but leave the fan running the heater doesn't blow instantly cold, exactly the same.

I wonder if stopstart equipped cars are clever enough to switch to recirculation to preserve the residual heat in the radiator.

atrixblue.-MFR-.

topdaddy wrote: »

The heater cannot work like that. The fans will work the heater wont as the coolant will not be circulating. That happens when the engine is running.fact. made your selves look silly. Pure mse.

OH please stop:rotfl: , water that's hot sits in the matrix and cores (just like a radiator) this is then governed by a temp sensor, the water remains hot inside the for a while (these matrixes are larger than conventional ones to carry slightly more water) and have a multi speed fan resistor on them to throttle the fan back slightly when the engine is off not over cool when water isnt flowing in and out of the matrix.


old style ones tend to go cold in 2 mins because the fans remains at a high speed, these days the fans (inc rad fan)throttle down when stationary with start stop enabled even when on high speed. coupled with the temp sensor the software in the ecu prevents the matrix going too cold and will start the engine to prevent the cabin getting cold.


even with the engine OFF with stop start my proceed has sat at junctions for 5+ mins and ive been toasty warm inside then auto start will kick in when the temp hit the number its governed by to auto start if the outside ambient temp is above a certain number auto start will not kick in. this is all linked in with the software.

topdaddy_2

atrixblue.-MFR-. wrote: »

OH please stop:rotfl: , water that's hot sits in the matrix and cores (just like a radiator) this is then governed by a temp sensor, the water remains hot inside the for a while (these matrixes are larger than conventional ones to carry slightly more water) and have a multi speed fan resistor on them to throttle the fan back slightly when the engine is off not over cool when water isnt flowing in and out of the matrix
old style ones tend to go cold in 2 mins because the fans remains at a high speed, these days the fans (inc rad fan)throttle down when stationary with start stop enabled even when on high speed. coupled with the temp sensor the software in the ecu prevents the matrix going too cold and will start the engine to prevent the cabin getting cold.
even with the engine OFF with stop start my proceed has sat at junctions for 5+ mins and ive been toasty warm inside then auto start will kick in when the temp hit the number its governed by to auto start if the outside ambient temp is above a certain number auto start will not kick in. this is all linked in with the software.

youre laughing but agreeing with me?:T
the heater will not work. It will not heat.
Eg. An engine up to temp that is then stopped. The ignition is switched to appropiate position(I possibly depending on ignition key setup) then the heater is switched on. Fans rotate and air flows. Then the heater control is moved from blue(or cold or low numerical temp etc again depending on car). This will not heat the cambin. The heater wont heat. The heater wont work.

colino

topdaddy are you being deliberately thick, a troll or a 5 year old wannabe?

motorguy

topdaddy wrote: »

youre laughing but agreeing with me?:T

No, no. We're laughing at you, not with you.

topdaddy wrote: »

the heater will not work. It will not heat.
Eg. An engine up to temp that is then stopped. The ignition is switched to appropiate position(I possibly depending on ignition key setup) then the heater is switched on.

No need to move the ignition key. You arent really grasping how stop / start works are you? :eek:

You're driving along. You have the heater on to keep the car warm. You come to a junction, or to an idle. The engine stops because the stopstart functionality has kicked in (assuming you've moved to neutral, foot on brake, foot off clutch) and the heater continues to run on, taking any remaining heat out of the matrix. Once the car CANNOT maintain that heat, the car will restart so that it can.

If you had not the heat previously on, and in the scenario whereby you put the heat to HOT and put the blowers on, the car would restart itself, if it needed to to get the cabin to your desired temperature.

topdaddy wrote: »

Fans rotate and air flows. Then the heater control is moved from blue(or cold or low numerical temp etc again depending on car). This will not heat the cambin. The heater wont heat. The heater wont work.

If that scenario arises, ie, the car has engaged engine off via stop start, and you previously hadnt the heater on, then the car will restart to enable the cabin to be heated.

I really didnt think this was difficult stuff.

anotherbaldrick

Quote Motorguy

I really didnt think this was difficult stuff.

It is amazing how some manage to get their underdungers in a total twist about something that is basically dead simple

atrixblue.-MFR-.

motorguy wrote: »

No, no. We're laughing at you, not with you.



No need to move the ignition key. You arent really grasping how stop / start works are you? :eek:

You're driving along. You have the heater on to keep the car warm. You come to a junction, or to an idle. The engine stops because the stopstart functionality has kicked in (assuming you've moved to neutral, foot on brake, foot off clutch) and the heater continues to run on, taking any remaining heat out of the matrix. Once the car CANNOT maintain that heat, the car will restart so that it can.

If you had not the heat previously on, and in the scenario whereby you put the heat to HOT and put the blowers on, the car would restart itself, if it needed to to get the cabin to your desired temperature.



If that scenario arises, ie, the car has engaged engine off via stop start, and you previously hadnt the heater on, then the car will restart to enable the cabin to be heated.

I really didnt think this was difficult stuff.

He's comparing it to a conventional heater matrix, based on a car (without stop start) that when you turn the ignition off, then back on without starting the heater will remain cold, but the heater matrix in a stop start is bigger and different to conventional ones, with the addition to a temp sensor and a speed resistor that is based upon 14v on the actual fan (not the fan speed selection resistor) when car is running 14V current, when car isn't running 12v current, when 14 v isn't sensed by the resistor, it throttles back the fan when stop mode is in effect to prevent the fan acting as a cooler! he never clicked on why in some cars you can blast the heater then when you come to stop it seems like its not blowing so hard, then when you pull off and accelerate it starts blowing hard again! this is because the fan in the matrix has its own speed resistor independent to the fan selection speed resistor in addition to the heaters that don't go off instantly they slowly cool after about 10-15 mins without auto start it will go cold but the ECU wont let it get to that stage!.


I give up explaining it now, as well other will, if he don't get it now he never will let him think he's right, and the rest know he's wrong.

topdaddy_2

motorguy wrote: »

No, no. We're laughing at you, not with you.



No need to move the ignition key. You arent really grasping how stop / start works are you? :eek:

You're driving along. You have the heater on to keep the car warm. You come to a junction, or to an idle. The engine stops because the stopstart functionality has kicked in (assuming you've moved to neutral, foot on brake, foot off clutch) and the heater continues to run on, taking any remaining heat out of the matrix. Once the car CANNOT maintain that heat, the car will restart so that it can.

If you had not the heat previously on, and in the scenario whereby you put the heat to HOT and put the blowers on, the car would restart itself, if it needed to to get the cabin to your desired temperature.



If that scenario arises, ie, the car has engaged engine off via stop start, and you previously hadnt the heater on, then the car will restart to enable the cabin to be heated.

I really didnt think this was difficult stuff.

Stop/start or a normal iginiton the heater wont function without the engine on. End of.Im laughing at all of you because it displays how poor this forum is .

topdaddy_2

colino wrote: »

topdaddy are you being deliberately thick, a troll or a 5 year old wannabe?

Are you always this rude or only when surpassed?