how the MHD works

tishpit · 07-24-2008, 06:25 PM

Just found this article on automobilemag.com regarding the 2009 Smart MHD:

"Once a driver touches the brakes or slows the car to less than five mph, the ForTwo's engine is shut off, leaving a battery pack to power accessories.... Although the system is currently destined for European streets only, the system's simplicity - coupled with a renewed interest in small cars within North America - could push the system onto U.S.-spec Smarts in the near future."

Wouldn't that be a BIG strain on that little battery to be running a/c, wipers, radio, headlight, etc. when engine is cut off? Or I are they referring to an ADDITIONAL battery "pack" (as in multiple batteries?) that would be used just for this purpose??? Anybody know about this?

Big Panda · 07-24-2008, 07:05 PM

Quote:

Originally Posted by tishpit

Just found this article on automobilemag.com regarding the 2009 Smart MHD:

"Once a driver touches the brakes or slows the car to less than five mph, the ForTwo's engine is shut off, leaving a battery pack to power accessories.... Although the system is currently destined for European streets only, the system's simplicity - coupled with a renewed interest in small cars within North America - could push the system onto U.S.-spec Smarts in the near future."

Wouldn't that be a BIG strain on that little battery to be running a/c, wipers, radio, headlight, etc. when engine is cut off? Or I are they referring to an ADDITIONAL battery "pack" (as in multiple batteries?) that would be used just for this purpose??? Anybody know about this?

i'm just guessing, but i would think that it's only for the time when you're engine is off. also, i read somewhere that it had a regenerative braking system, to charge the batteries while braking OR that may have been the 'ev' model. just too many things going on......

but my question is: just where will this 'battery pack' fit? only smart knows....

NCC1701 · 07-24-2008, 07:25 PM

As a city car, re-starting the engine when leaving every traffic light ... seems like torture on the starter motor. Maybe it has a super beefed up starter?

**JPaul** · 07-25-2008, 02:05 AM

Quote:

Originally Posted by NCC1701

As a city car, re-starting the engine when leaving every traffic light ... seems like torture on the starter motor. Maybe it has a super beefed up starter?

According to what I've been told, it's a different system using a "regenerator" that acts as a starter/generator combined. No cogwheel on a flywheel, just a spin via a belt. Am I correct?

**Wdhitch** · 07-25-2008, 02:12 AM

Did I miss something??? I thought the MHD wasn't comming to the US???

Big Panda · 07-25-2008, 02:24 AM

Quote:

Originally Posted by tishpit

Just found this article on automobilemag.com regarding the 2009 Smart MHD:

"Once a driver touches the brakes or slows the car to less than five mph, the ForTwo's engine is shut off, leaving a battery pack to power accessories.... Although the system is currently destined for European streets only, the system's simplicity - coupled with a renewed interest in small cars within North America - could push the system onto U.S.-spec Smarts in the near future."

Quote:

Originally Posted by JPaul

According to what I've been told, it's a different system using a "regenerator" that acts as a starter/generator combined. No cogwheel on a flywheel, just a spin via a belt. Am I correct?

yes Sir, you ARE CORRECT!

Quote:

Originally Posted by Wdhitch

Did I miss something??? I thought the MHD wasn't comming to the US???

uh......you're right. no one said it WAS coming, only that it 'could'...

and besides, i don't know what the big deal is. it has a switch on the console next to the shifter lever that reads "Economy" and if you want to, you can TURN OFF THE MHD function if you don't want to use it!!!

**Wdhitch** · 07-25-2008, 07:58 AM

Quote:

Originally Posted by Jeepster55

uh......you're right. no one said it WAS coming, only that it 'could'...

Tease....

2smartArizona · 09-01-2008, 02:23 PM

Quote:

Originally Posted by NCC1701

As a city car, re-starting the engine when leaving every traffic light ... seems like torture on the starter motor. Maybe it has a super beefed up starter?

System actually uses something other than a traditional starter motor to start the motor...you can read about here...old article...same technology...

http://www.mitsubishi-motors.com/cor...004/16E_09.pdf