KMP647
Posts: 99
Joined: Tue May 06, 2014 5:22 am

starting the range extender for emissions testing

Fri Jan 02, 2015 5:35 am

There is a procedure to trick the range extender to start for emissions testing and service.

I searched but cant find it anywhere. I want to force mine to start as my car is new to me but sat on the dealer lot for 5 months.

I want to be sure I can trust it. I think you have to open the hatch and push some sort of series of buttons?

thank you in advance!
I3 Rex mega
Northern Virginia

FrancisJeffries
Posts: 148
Joined: Thu May 15, 2014 12:47 pm
Location: Stevenage, UK

Re: starting the range extender for emissions testing

Fri Jan 02, 2015 8:22 am

This is copied (but I couldn't get rid of the underscores :( ) from Section 10 of the 12-W20 Engine.pdf:

10.1._Exhaust-gas_test_mode
It_is_necessary_to_start_the_combustion_engine_for_an_exhaust-gas_test_in_the_BMW_I01_with_range extender._This_is_made_possible_by_a_certain_operating_sequence:
• Tailgate_is_open
• Switch_on_ignition_and_engage_drive_position_"P"_(without_braking)
• Press_and_hold_down_the_accelerator_pedal_within_60_seconds
• Press_the_brake_three_times_within_20_seconds_and_hold
• Release_the_accelerator_pedal_and_press_the_START-STOP_button_when_the_brake_is_actuated
• The_combustion_engine_starts_if_the_SOC_of_the_high-voltage_battery_is_less_than_75 %.
As_a_Check_Control_message_the_status_"Exhaust-gas_test_mode_activated"_is_output_when_the combustion_engine_is_running._The_empty_run_point_is_automatically_approached_during_the_warm-up phase._Using_the_pedal_sensor_position_two_speed_points_of_the_combustion_engine_are_selected_for the_measurement.
The_"Exhaust-gas_test"_mode_is_automatically_ended:
• after_20 minutes
• or_at_the_start_of_the_journey
• or_by_switching_off_the_ignition.
Noteworthy cars I've owned previously: Lancia Aprilia ... 20kWh i3 Rex.

KMP647
Posts: 99
Joined: Tue May 06, 2014 5:22 am

Fri Jan 02, 2015 9:06 am

Thank you . I'll give it a try!
I3 Rex mega
Northern Virginia

Tomasz
Posts: 175
Joined: Tue Nov 18, 2014 11:16 am

Re: starting the range extender for emissions testing

Fri Jan 02, 2015 9:48 am

Do you know if it charges the battery during that cycle?

If yes that could be used as nice quick charger option, 20 minutes would probably charge good 5kWh into battery (assuming it's depleted deep enough to accept that charge).
i3 REx with 2.4 gal tank

KMP647
Posts: 99
Joined: Tue May 06, 2014 5:22 am

Re: starting the range extender for emissions testing

Fri Jan 02, 2015 11:52 am

easy to do, glad I did it as the fuel was a bit old. energy screen does show it charging the battery for about 5 minutes then it stopped adding charge
does not seem like a practical method to charge the battery.
thank you
I3 Rex mega
Northern Virginia

Tomasz
Posts: 175
Joined: Tue Nov 18, 2014 11:16 am

Re: starting the range extender for emissions testing

Fri Jan 02, 2015 1:28 pm

KMP647 wrote:easy to do, glad I did it as the fuel was a bit old. energy screen does show it charging the battery for about 5 minutes then it stopped adding charge
does not seem like a practical method to charge the battery.
thank you

Probably not for everyday use, but could be used in a pinch to get you over that 10000ft pass without reduction in power?
i3 REx with 2.4 gal tank

Idleup
Posts: 131
Joined: Tue Dec 23, 2014 6:03 am
Location: North Georgia
Contact: Website

Re: starting the range extender for emissions testing

Sun Jan 11, 2015 11:22 am

The test mode will charge the battery - that is why you have to be under 75% to begin the test and it only runs a certain period time to avoid over-charging. i.e.

GodFollower
Posts: 58
Joined: Tue Dec 09, 2014 1:00 am

Re: starting the range extender for emissions testing

Fri Jan 16, 2015 9:13 pm

I speak from experience here, do not bank on the test mode gaining you very much in terms of battery percentage. In 15 minutes at low speed it regained about 6%, have not sat with my foot on the throttle to know if the high speed does much better. From my understanding, during this inspection test the engine is not heavily loaded(partial generator load only). Emissions testing is not usually done at full load, just at idle and high idle.

Idleup
Posts: 131
Joined: Tue Dec 23, 2014 6:03 am
Location: North Georgia
Contact: Website

Re: starting the range extender for emissions testing

Sat Jan 17, 2015 6:59 am

BMW desperately needs to update the software for the I3 so when you start he engine at a reasonable SOC say anything below 50% - if the car is not demanding the current - the RX can charge the battery - what's the sense of having the engine running to merely hold the state of charge, why not bring a 50% battery back to 75% if you're not demanding the current - a typical situation would be driving around in city traffic.

On my I8, if I shift to Sport mode the onboard generator attached to the engine will charge the battery up "one mile for each two miles I drive" - in 20-30 minutes of driving, I can add back 12 miles to my battery. The RX generator is more than capable of achieving this!

Mike

jadnashuanh
Posts: 4339
Joined: Thu May 22, 2014 2:07 pm
Location: Nashua, NH USA

Re: starting the range extender for emissions testing

Sat Jan 17, 2015 5:47 pm

The i8 has over 200hp, and thus has plenty of output under normal driving to be able to recharge the batteries up to their full capacity while driving the car down the road quite briskly. The i3's 34hp REx is unable to maintain charge, let alone recharge, the batteries if you are stressing things. Yes, around town, it will have excess capacity, and, to a small amount, does recharge the batteries, but it is not designed to top them off...different cars, different priorities and operating characteristics.
Jim DeBruycker
2011 535i x-drive GT, 2014 i3 BEV

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