[deepskier]

Browsing the NHTSA site for the ID.4, I noticed VW has posted some interesting tech documents for the car. Enjoy!

The ID.4 New Model Overview:
https://static.nhtsa.gov/odi/tsbs/2021/MC-10189712-0001.pdf

The High-Voltage System in the ID.4
https://static.nhtsa.gov/odi/tsbs/2021/MC-10186407-0001.pdf

The ID.4 Electromechanical Brake Servo (eBKV)
https://static.nhtsa.gov/odi/tsbs/2021/MC-10189711-0001.pdf

How to Install a Trailer Brake Controller
https://static.nhtsa.gov/odi/tsbs/2021/MC-10189308-0001.pdf

2021 VW Maintenance Schedule – Electric Models
https://static.nhtsa.gov/odi/tsbs/2021/MC-10185652-0001.pdf

Service Notes
https://static.nhtsa.gov/odi/tsbs/2021/MC-10186972-0001.pdf

 

[Huey52]

Keepers all. Thanks very much deepskier!

The maintenance doc gave me a grin; mostly just a lot of checking. But that's a good thing.

 

[ixlr08]

Thanks for posting these.

 

[Spin]

Great info, thanks!

 

[DanM]

The center airbag shown in this image is not for the North American market.

From the model overview, explicit confirmation of an airbag change for North America. It will be intersting to see if this shows up in NHSTA vs EuroNCAP test results.

The three-phase current drive is available in two different output levels that are software-based. The basic level provides 201 hp (150 kW) and the performance level provides 302 hp (224 kW)

Anyone know what to make of this note? "Software-based" output levels? It seems not very cost effective to include a motor with every car produced so far that is software limited. It seems more likely to me this is referring to the AWD vs RWD power levels.

The air intake box is designed to accommodate two filters. The North American Region uses a single filter element.

For those wanting additional air filtration, this not about the cabin air filter is interesting. You could double up the filters if needed, it sounds like. Or possibly use some sort of pre-filter to keep the primary one from getting so dirty?

 

[RocketVol]

Browsing the NHTSA site for the ID.4, I noticed VW has posted some interesting tech documents for the car. Enjoy!

The ID.4 New Model Overview:
https://static.nhtsa.gov/odi/tsbs/2021/MC-10189712-0001.pdf

The High-Voltage System in the ID.4
https://static.nhtsa.gov/odi/tsbs/2021/MC-10186407-0001.pdf

The ID.4 Electromechanical Brake Servo (eBKV)
https://static.nhtsa.gov/odi/tsbs/2021/MC-10189711-0001.pdf

How to Install a Trailer Brake Controller
https://static.nhtsa.gov/odi/tsbs/2021/MC-10189308-0001.pdf

2021 VW Maintenance Schedule – Electric Models
https://static.nhtsa.gov/odi/tsbs/2021/MC-10185652-0001.pdf

Service Notes
https://static.nhtsa.gov/odi/tsbs/2021/MC-10186972-0001.pdf

Finally the SSPs! Thanks so much for finding and posting these! Really appreciated!

 

[majorgearhead]

Browsing the NHTSA site for the ID.4, I noticed VW has posted some interesting tech documents for the car. Enjoy!

The ID.4 New Model Overview:
https://static.nhtsa.gov/odi/tsbs/2021/MC-10189712-0001.pdf

The High-Voltage System in the ID.4
https://static.nhtsa.gov/odi/tsbs/2021/MC-10186407-0001.pdf

The ID.4 Electromechanical Brake Servo (eBKV)
https://static.nhtsa.gov/odi/tsbs/2021/MC-10189711-0001.pdf

How to Install a Trailer Brake Controller
https://static.nhtsa.gov/odi/tsbs/2021/MC-10189308-0001.pdf

2021 VW Maintenance Schedule – Electric Models
https://static.nhtsa.gov/odi/tsbs/2021/MC-10185652-0001.pdf

Service Notes
https://static.nhtsa.gov/odi/tsbs/2021/MC-10186972-0001.pdf

This is great. The trailer brake one answers a long standing question I had about trailer braking, mainly where the connection point is. Now I figured it was in the drivers side kick panel, under the dead panel like the Atlas, but this confirms it. Thank you for posting!

 

[dg4prez]

Hey Ross Tech, you seeing this? Software-based. Now that's interesting.

This is probably gonna take more than the 'ol evry mod to get more power out of it. 🤣

Yes, I know the evry mod was garbage.

 

[ericy]

Keepers all. Thanks very much deepskier!

I noticed gigabit ethernet communications, and was immediately wondering if there was somewhere you could tap in with a packet sniffer. It might be that the high datarates are only used for audio/video, and wouldn't be all that interesting to the rest of us.

I also noticed this little tidbit:

 

[SunWizard]

The 1st one answers the question about Turning radius on the AWD is 38, the RWD 33.5 ft.

 

[Dana]

Didn't even know such info was available on NHTSA! Regrettable that US cars don't get center airbag. Hope NHTSA crash test results for ID.4 and Mach e come out soon. Especially want to see rollover estimates which are generally terrible for SUVs but probably not so for vehicles designed on BEV skateboard platforms due to lower center of gravity. How come ground clearance is shown as 6.4", whereas previous reporting shows 8.2"? At an ID.4 drive event I saw a staff member crawl under the car and measure 8.3".

 

[FredT]

Didn't even know such info was available on NHTSA! Regrettable that US cars don't get center airbag. Hope NHTSA crash test results for ID.4 and Mach e come out soon.

Mach-e results are out:

2021 Ford Mustang Mach-E Narrowly Misses Top Safety Pick+ Rating

Would have gotten top rating except that the lights on lower trims were "marginal".

 

[Dana]

From the model overview, explicit confirmation of an airbag change for North America. It will be intersting to see if this shows up in NHSTA vs EuroNCAP test results.


Anyone know what to make of this note? "Software-based" output levels? It seems not very cost effective to include a motor with every car produced so far that is software limited. It seems more likely to me this is referring to the AWD vs RWD power levels.


For those wanting additional air filtration, this not about the cabin air filter is interesting. You could double up the filters if needed, it sounds like. Or possibly use some sort of pre-filter to keep the primary one from getting so dirty?

Mach-e results are out:

2021 Ford Mustang Mach-E Narrowly Misses Top Safety Pick+ Rating

Would have gotten top rating except that the lights on lower trims were "marginal".

Right, Mach e did great in IIHS! ID.4 and Mach e are to be tested by NHTSA this year too. ID.4 already tested by EuroNCAP and did very well. However, ID.4s sold in Europe also have center airbags so an America bound ID.4 (which don't come equipped with center airbag) may not do quite as well, esp. is side crash test.

 

[SunWizard]

Interesting to see the actual temps for BMS:
< 46°F: heating by the Z132 Heating Element (PTC)
95°F (in vehicle operation): cooling by the heat exchanger for heat condenser (AC)
86°F (during charging): cooling by the heat exchanger for heat condenser (AC)
At a temperature of 59°F (15°C) or higher the thermostat opens, allowing battery coolant to flow to the radiator (passive cooling) or cabin heat.
The mixing valve is used to integrate the battery into the low-temperature circuit, which is a great efficiency feature since it allows the battery+motor+electronics excess heat to be used to warm the battery, if needed, saving the 5.5kw that the battery heater can draw.

 

[theboomr]

Interesting to see the actual temps for BMS:
< 46°F: heating by the Z132 Heating Element (PTC)
95°F (in vehicle operation): cooling by the heat exchanger for heat condenser (AC)
86°F (during charging): cooling by the heat exchanger for heat condenser (AC)
At a temperature of 59°F (15°C) or higher the thermostat opens, allowing battery coolant to flow to the radiator (passive cooling.)
The mixing valve can be used to integrate the battery into the low-temperature circuit, which is a great efficiency feature since it allows the battery cooling excess heat to be used to warm the cabin, if needed, saving the 6kw that the cabin heater draws.

Nice to see battery heat can be used toward heating the cabin! I wonder if we'll ever see other EVs do the thing Tesla did with the Model 3 where heat from the electric motor can be recaptured for cabin heating. Isn't that a thing they did? Or did I make that up?

 

[SunWizard]

Nice to see battery heat can be used toward heating the cabin! I wonder if we'll ever see other EVs do the thing Tesla did with the Model 3 where heat from the electric motor can be recaptured for cabin heating. Isn't that a thing they did? Or did I make that up?

The ID.4 does this as well, not just from the motors coolant but also the motor speed controls has coolant and even the heat from the 400VDC to 12VDC converter is in the coolant, which the doc also state is 3kw. The coolant loop drawings are there, its a very efficient design, just not quite as efficient as the heat pump models. But US model is a lot simpler with the PTC heater.

 

[Dana]

The "body" section under "overview" is fascinating. 5 kinds of steel and aluminum are used in ID.4. and graphics show where each type is used! It even explains about the door handles and how to open door if battery is dead. What about if key fob has low batteries and gets locked inside car? At least the BMW 530e gives a low battery warning for key fob on driver display. Does ID.4 do this?
With fob locked inside is there a way to get in without using that pressure device which can cause some distortion damage (near top of window) to the roof?

 

[Andy at Ross-Tech.com]

Browsing the NHTSA site for the ID.4, I noticed VW has posted some interesting tech documents for the car. Enjoy!

How do you browse by car? I find their website hard to navigate.

Edit, answering my own question, use this link:

2021 VOLKSWAGEN ID.4 SUV RWD | NHTSA

www.nhtsa.gov

 

[Nai3t]

I'd like some clarification on blended braking, if anybody knows.

The ID.4's eBKV is explained very well, but what isn't explained is how regenerative braking is applied based on brake pedal input.

What it does show is that the brake pedal directly actuates the hydraulic system. It says the servo enhances braking input force by 7x to 8x. But it doesn't say "up to" 8x making it sound as though this is just a fixed proportion of boost.

What this all indicates to me is there will always be a fiction braking component to any braking pedal effort, and it will always be proportional to pedal input travel. This in turn implies that regenerative efforts can only be applied in response to the frictional component already being employed.

If that's correct, it would seem this is more a "regenerative-boosted friction brake" rather than a blended system as I've come to understand it.

It certainly explains the brake dust I wrote about in another thread.

So what am I not understanding about this system?

 

[SunWizard]

The electric motor provides all braking up to about 0.25g of deceleration, according to VW, at which point the friction brakes activate. The braking control system was programmed to seamlessly blend regenerative and friction braking for consistent pedal feel, VW said.