Auto Stop-Start Wear & Tear - Honda CRZ Forum: Honda CR-Z Hybrid Car Forums

gordonfc · 05-24-2011, 11:34 AM

Anybody have any idea regarding wear and tear on the starter system by shutting down and starting up 15 - 20 times a day (around town shopping etc)

I've been bypassing the shut-down by putting the front defroster on and fan set at 1 bar.
I know the systems been around for quite a while on other Honda's.
Any recalls on them, re the shut-down start-up system?

TinTin · 05-24-2011, 12:34 PM

the motor used to restart the car is also the one you use to assist the car while driving. If its ok to help move the vehicle, its going to be ok to start the engine since its a much less stressful task

CRaZee · 05-24-2011, 12:38 PM

Quote:

Originally Posted by gordonfc

Anybody have any idea regarding wear and tear on the starter system by shutting down and starting up 15 - 20 times a day (around town shopping etc)

I've been bypassing the shut-down by putting the front defroster on and fan set at 1 bar.
I know the systems been around for quite a while on other Honda's.
Any recalls on them, re the shut-down start-up system?

It is designed to do that.. and Honda is really good when they design something. As mentioned, it is the IMA motor that starts the car... not going to hurt it! It is not like some cheesy, designed to fail starter you get on some cars.

Scotty001 · 05-24-2011, 08:28 PM

Autostart is fine. No worries. Is also in part why the prescribed oil is 0w20.. Unless your CR-Z is - eh - stretched as depicted in the avatar..

john21031 · 05-25-2011, 12:09 AM

I don't have a CRZ and don't really have the facts on the tear, but.

Potentially, the starting of the engine will stress out the mechanical parts like pistons, cam, crankshaft, connecting rod bearings, etc. This is because when the engine is shut off, the oil drains into the crank case. When it's restarted, for the first immediate time, the moving parts are running without the fresh supply of oil on them - until the oil pump bring the oil after a few moments. There must also be some relay that will eventually burn its contacts off due to so frequently engaging and routing such amount of current from the batteries to the electric motor.

Hopefully it will not happen before other major components on the car make it not worthy of a repair vs replacement (hopefully years from now).

Good question.

kyo · 05-25-2011, 12:19 AM

It takes more than 30 seconds for the oil to 'drain off' the parts >_> ... if that was true, when you started any vehicle, especially older ones with sloppy tolerances and heavy weighted oil, you would hear grinding noises, ever hear metal on metal? it isn't pretty.

The car only uses a starter in EXTREME cold or depleted hybrid battery pack.

Relay burning out? Seriously, this isn't an car built in america ... /poke

If you really wanted to subscribe to this train of thought, then the ONLY engine you'd have in your car would be a rotary, surely you wouldn't want pistons that have to change directions 180 degrees 4 times per cycle compared to something that spins and carries its momentum through the combustion cycle. I mean, all that wear and tear on the rods and crank from a mass moving at insane speeds reversing direction at even greater speeds, how does it not just snap at 6000 rpm!!! That is TONS of force.

Engineering ... check it out sometime.

VTEC Mini · 05-25-2011, 09:25 AM

The only thing I worry about is the inrush current. When ever you put the juice to any electrical device there is high spike of energy that hits it. That's why light bulbs blow out the minute you hit the switch. That might be a problem in the future.

RedefinedCRZ · 05-25-2011, 12:06 PM

I honestly do not think you will ever see any issues with the IMA system. There are old Insights on the road with the original electric motors in them and batteries for that matter. I know the service department here in town said they just did a engine on one after 300,000 miles. The electric motor and batteries are still testing out strong, the gas motor is what went, and it was failure due to not replacing the timing belt at the right interval this last time.

Colin · 05-25-2011, 02:25 PM

Quote:

Originally Posted by RedefinedCRZ

.it was failure due to not replacing the timing belt at the right interval this last time.

And here I thought you were going to say the engine failed due to all the autostopping!

lexicon · 05-25-2011, 04:20 PM

The IMA doesn't use anything as crude as a relay - it's all solid-state switching. It has to be to control the amount of juice supplied, it's not simply an "on" or "off" thing. So no contacts to burn out and the current is controlled so inrush is kept in check too.
The comments about oil-drain have some validity and this may be one reason why auto-stop times out after 90 seconds.

05-24-2011, 12:34 PM	#2 (permalink)
TinTin Senior Member Join Date: Nov 2010 Location: Waterloo, Ontario, Canada Posts: 1,369	the motor used to restart the car is also the one you use to assist the car while driving. If its ok to help move the vehicle, its going to be ok to start the engine since its a much less stressful task __________________

05-25-2011, 09:25 AM	#7 (permalink)
VTEC Mini Join Date: May 2010 Posts: 3,102	The only thing I worry about is the inrush current. When ever you put the juice to any electrical device there is high spike of energy that hits it. That's why light bulbs blow out the minute you hit the switch. That might be a problem in the future. __________________

05-25-2011, 04:20 PM	#10 (permalink)
lexicon Senior Member Join Date: Nov 2010 Location: Lancashire, UK Posts: 220	The IMA doesn't use anything as crude as a relay - it's all solid-state switching. It has to be to control the amount of juice supplied, it's not simply an "on" or "off" thing. So no contacts to burn out and the current is controlled so inrush is kept in check too. The comments about oil-drain have some validity and this may be one reason why auto-stop times out after 90 seconds. __________________ 2010 CR-Z GT 6MT Crystal Black Pearl

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05-25-2011, 12:09 AM	#5 (permalink)
john21031 Junior Member Join Date: Aug 2010 Posts: 12	I don't have a CRZ and don't really have the facts on the tear, but. Potentially, the starting of the engine will stress out the mechanical parts like pistons, cam, crankshaft, connecting rod bearings, etc. This is because when the engine is shut off, the oil drains into the crank case. When it's restarted, for the first immediate time, the moving parts are running without the fresh supply of oil on them - until the oil pump bring the oil after a few moments. There must also be some relay that will eventually burn its contacts off due to so frequently engaging and routing such amount of current from the batteries to the electric motor. Hopefully it will not happen before other major components on the car make it not worthy of a repair vs replacement (hopefully years from now). Good question.

05-25-2011, 12:19 AM	#6 (permalink)
kyo Member Join Date: Apr 2011 Posts: 38	It takes more than 30 seconds for the oil to 'drain off' the parts >_> ... if that was true, when you started any vehicle, especially older ones with sloppy tolerances and heavy weighted oil, you would hear grinding noises, ever hear metal on metal? it isn't pretty. The car only uses a starter in EXTREME cold or depleted hybrid battery pack. Relay burning out? Seriously, this isn't an car built in america ... /poke If you really wanted to subscribe to this train of thought, then the ONLY engine you'd have in your car would be a rotary, surely you wouldn't want pistons that have to change directions 180 degrees 4 times per cycle compared to something that spins and carries its momentum through the combustion cycle. I mean, all that wear and tear on the rods and crank from a mass moving at insane speeds reversing direction at even greater speeds, how does it not just snap at 6000 rpm!!! That is TONS of force. Engineering ... check it out sometime.