Starter/generator

Riverslim · Jul 5, 2018

Used on lawnmowers mostly, right? Why weren't they used on cars?

Doug - Iowa · Jul 5, 2018

The ones I have on my Cubs can barely spin a single cylinder Kohler. Would take a real big unit to spin a v8!

Billy Shafer · Jul 5, 2018

It would take a big battery and would weigh a ton. Most of the old Onans are exciter cranked. Weigh around 300-400 pounds. Most of that is the cranking section.

Russ from MN · Jul 5, 2018

Not practical, didn't work very well on lawn tractors. I wonder if a similar system is used on some of the new hybrids?

Jerry Coulter · Jul 5, 2018

Back in the 1920's, Dodge cars used that system powered by a 12 volt battery.

Bob M · Jul 5, 2018

Traditional starter-generators have several inherent problems:
1 - Low cranking power for the size. An MG for a 12 HP Kohler is the same size as a 50's era car generator. Imagine how big one would need to be to crank a 200 HP V8(!)
2 - Very low amp output at speed, and no output at idle.
3 - Abysmal efficiency - mower MG's convert more input shaft energy into heat than into electrical watts.
4 - Intolerant of overspeed. Even a momentary overspeed can "bird nest" the armature windings, trashing the MG.
5 - Expensive (last time I looked a replacement MG for my son's old 12 HP Cub Cadet was over $200). Rebuilds are not cheap either.

M w J · Jul 5, 2018

volkswagon engines in spraycoupes used them and they were 4 cyclinder.

MNGB · Jul 5, 2018

Just about all turbine engines are starter generator started and provide the electrical power needed and they work good
GB in Mn

MNGB · Jul 5, 2018

(quoted from post at 20:34:28 07/05/18) Just about all turbine engines are starter generator started and provide the electrical power needed and they work good
GB in Mn

I should have turboshaft engines that I have experience with not all turbine engine.
GB

Ian Beale · Jul 6, 2018

Size - as you'll find on mid 1920's Dodge 4 cylinders that used them

BarnyardEngineering · Jul 6, 2018

Can you imagine trying to crank over a V8 engine with a BELT? Splash through a puddle on a rainy day, and next time you go to start, SKREEEEEEEEEEEEEECH! Belt's slipping.

Take a look at what it takes to belt start a tractor... another tractor!

Duner Wi · Jul 6, 2018

As Jerry and Ian said , Dodge Brothers used a gear driven starter generator. When Dodge became a division of Chrysler, after the death of the brothers that was the end of 12 volt starter generator in Dodge cars.

Busflyer · Jul 6, 2018

(quoted from post at 04:34:28 07/06/18) Just about all turbine engines are starter generator started and provide the electrical power needed and they work good
GB in Mn

I agree. Nearly all smaller turbine powered aircraft (business jet size and turboprops) use them. They work great and are dependable. Must not be too heavy because weight is the enemy of aircraft.

Airline size engines use separate generators and the starters are pneumatic.

Jon Hagen · Jul 6, 2018

look at any Hybrid Toyota or Ford from the last 15 years, they have a starter generator connected directly to the engine at the transaxle. Right at 60-100 hp and start the engine instantly at any temp. The 2019 Dodge mild hybrid pickups use a belt drive starter generator driven with a cog belt, available in V6 and V8, although they still have a conventional starter for use in very cold temps. A 48 volt system on the 19 Dodge / Ram.

Jon Hagen · Jul 6, 2018

here is a bit about the 2019 Ram with belt drive starter / generator.
2019 Ram with starter / generator.

Mo in NE tex · Jul 6, 2018

My E-Z Go Work Horse has a starter/generator. It has kept it going for years now.

Starter/generator

Riverslim

Member

Doug - Iowa

Member

Billy Shafer

Well-known Member

Russ from MN

Well-known Member

Jerry Coulter

Member

Bob M

Well-known Member

M w J

Member

MNGB

Well-known Member

MNGB

Well-known Member

Ian Beale

Member

BarnyardEngineering

Well-known Member

Duner Wi

Well-known Member

Busflyer

Member

Jon Hagen

Well-known Member

Jon Hagen

Well-known Member

Mo in NE tex

Member

Similar threads