2020 VW Golf Mild Hybrid System Revealed

[cawimmer430]

2020 VW Golf Mild Hybrid System Revealed

Volkswagen continues to tease the 2020 Golf as the company has used the Vienna Motor Symposium to unveil the car's new 48 volt mild hybrid system.

According to automaker, the Golf will be equipped with a 48V belt starter generator and a 48V lithium-ion battery. The belt starter generator features an integrated electric motor that provides recuperation and boost functions.




In recuperation mode, the system converts kinetic energy into electricity and this is stored in the lithium-ion battery that is located underneath the front passenger seat. This energy can then be used to provide an "electric boost" during acceleration.

The mild hybrid system also shuts the engine off as soon as the driver takes their foot off the accelerator. Volkswagen says the engine switches "on and off without delay" and this process produces minimal vibrations. Thanks to this setup, the Golf saves approximately 0.4 liters (0.1 gallons) of fuel every 100 km (62 miles).

Initially, the system will be offered on 1.0- and 1.5-liter EA211 evo engines that are paired to a dual-clutch transmission. The system will then gradually spread to other engines and models.



While the mild hybrid system will improve fuel efficiency and reduce emissions, Volkswagen said the "most efficient way to reduce CO2 emissions is to expand battery electric vehicles on a broad scale." As part of this effort, they will introduce the ID.3 later this year.

The ID.3 will feature a 201 hp (150 kW / 204 PS) electric motor that will enable the hatchback to hit a top speed of 99 mph (160 km/h). More importantly, the model will be offered with multiple battery packs which will allow the car to travel between 205 – 342+ miles (330 – 550+ km) according to the Worldwide Harmonised Light Vehicle Test Procedure.



Link: https://www.carscoops.com/2019/05/2020-vw-golf-mild-hybrid-system-revealed/

[12,000 RPM]

Very interesting

Wish they'd just do a regular hybrid... no milds, no plug ins, no BEVs. Give me a 40MPG Golf that can hit 60 in the low 6s.

[FoMoJo]

Why bother?

[Galaxy]

VW has stated that they would rather go full electric as soon as possible, and as a stop gap measure offer the mild hybrids. They do not want to spend resources on full hybrids. Granted that might change, especially with EU CO2 targets coming into effect before electric cars are likely to really take off.

[12,000 RPM]

They are going to hit a brick wall when they along with everyone else realize there isn't enough material to undergo this BEV revolution.

[Galaxy]

They are going to hit a brick wall when they along with everyone else realize there isn't enough material to undergo this BEV revolution.

They are noticing that now. The Audi E-Tron production is battery constrained. Which is why VW wants to make their own battery cells. They expect to spend $56 Billion on batteries by 2030.

[giant_mtb]

So...it's just fancy stop-start...?  Such innovation. Many wows.

[BimmerM3]

So...it's just fancy stop-start...?  Such innovation. Many wows.

That's one component of it, but the electric motor can also provide additional power.

[FoMoJo]

That's one component of it, but the electric motor can also provide additional power.

For how long?

Wasn't GM doing this about 15 years ago on their pickups?

[giant_mtb]

That's one component of it, but the electric motor can also provide additional power.

What does it do? Make the serpentine belt spin faster? Is this motor connected to the actual drivetrain?

[BimmerM3]

For how long?

Wasn't GM doing this about 15 years ago on their pickups?

What does it do? Make the serpentine belt spin faster? Is this motor connected to the actual drivetrain?

I just read the post.

Based on the last image, it looks like the electric motor/generator is connected directly to the engine by a belt.

[12,000 RPM]

They are noticing that now. The Audi E-Tron production is battery constrained. Which is why VW wants to make their own battery cells. They expect to spend $56 Billion on batteries by 2030.

I know they're trying to get the Dieselgate monkey off their back, but they probably should have figured that out before making these grand proclamations. I think VWAG's approach to hybrids was pretty weak too. That easily could have been their TDI replacement and would make much better use of battery capacity. 1 BEV = 40 or so normal hybrids.

[Galaxy]

I know they're trying to get the Dieselgate monkey off their back, but they probably should have figured that out before making these grand proclamations. I think VWAG's approach to hybrids was pretty weak too. That easily could have been their TDI replacement and would make much better use of battery capacity. 1 BEV = 40 or so normal hybrids.

I think to some extent VW wants to turn a lemon into lemonade they have to invest XX Billions in electric vehicles anyways because of dieselgate, so they decided to go all in.

[giant_mtb]

I just read the post.

Based on the last image, it looks like the electric motor/generator is connected directly to the engine by a belt.

That's what I gathered as well. So beyond acting as the start-stop motor, the only other way I can picture it "boosting" power is by using the motor to help spin the serpentine.  Which is odd, but alright...whatever it takes to use .1 gallon less.

[BimmerM3]

That's what I gathered as well. So beyond acting as the start-stop motor, the only other way I can picture it "boosting" power is by using the motor to help spin the serpentine.  Which is odd, but alright...whatever it takes to use .1 gallon less.

I believe the .1 gallon was just from the instant stop/start. Presumably, the boost under acceleration will have a greater benefit than that.

[FoMoJo]

So they have a 12 volt starter as well as a 48 volt starter generator?  Why the extra starter?

[12,000 RPM]

So they have a 12 volt starter as well as a 48 volt starter generator?  Why the extra starter?

Because Volkswagen

[Laconian]

The rest of the car is 12V.

[r0tor]

Isn't chrysler already doing this with eboost?

[BimmerM3]

Isn't chrysler already doing this with eboost?

Not sure, but it's definitely not the first time I've seen the basic concept.

[Laconian]

Chebby did this on the Malibu.

[2o6]

Yeah, Chrysler is doing this on the new RAM pickups, and GM did this on all of the "mild hybrid" sedans and SUV's.

(Malibu ECO, Aura and Vue Greenline)


The Two-Mode hybrid on the old Tahoe and Chevy trucks was different (and better).

[MX793]

They are noticing that now. The Audi E-Tron production is battery constrained. Which is why VW wants to make their own battery cells. They expect to spend $56 Billion on batteries by 2030.

Maybe they should, I don't know, try learning how to build their primary product (cars) better before they venture into the battery business?  Not sure I'd trust a battery made by a company that struggles to keep headliners attached to the roofs of their cars beyond the warranty period.

[veeman]

Start/stop sucks anyways.  I've driven plenty of cars with them.  Yeah it's supposedly seamless.  Then why is it so irritating.  Which means it's not seamless. 

[93JC]

Start/stop sucks anyways.

[FoMoJo]

Start/stop sucks anyways.  I've driven plenty of cars with them.  Yeah it's supposedly seamless.  Then why is it so irritating.  Which means it's not seamless. 

If the start/stop feature was part of the function of the 48 volt starter/generator, it may be more seamless.  Part of the annoyance is the starter motor sound engaging the flywheel; especially at a stoplight with a dozen or so cars all together engaging their starters.  The belt driven starter/electric motor/generator should just start moving the car before the engine kicks in.

[MX793]

I find the sensation of the engine shutting off when the car comes to a stop alarming.  That's mostly conditioning, though.  Enough time in a vehicle with start/stop and I'd get used to it.

[BimmerM3]

I find the sensation of the engine shutting off when the car comes to a stop alarming.  That's mostly conditioning, though.  Enough time in a vehicle with start/stop and I'd get used to it.

Yeah, it took me like a day to get used to in a rental Jetta.

[FoMoJo]

I find the sensation of the engine shutting off when the car comes to a stop alarming.  That's mostly conditioning, though.  Enough time in a vehicle with start/stop and I'd get used to it.

My concern has more to do with the wear and tear on the Bendix gear, though that may be a non issue.  The silence and lack of any sensation of vibration is a bit unnerving though.

[veeman]

You either have a silent car (EV) or a car with the background hum of an engine.  The back and forth of engine hum vs silence makes for a non gratifying driving experience.  The brain naturally filters out low level background noise but the brain can't do that properly if there's a frequent non rhythmic significant change to that background noise. If I had it and couldn't shut it off, I'd get used to it but still not like it.  Therefore it sucks.  If all these car companies spend a lot of R and D on getting the engine noise just right and even artificially alter it through car stereo speakers, this start/stop feature runs exactly counter to that philosophy of maximum aural gratification. 

If I had a choice would I put up with it for a 10% increase in fuel economy.  Probably.  1 or 2% or whatever small amount it is, definitely not.