This month – We are discussing some of the incredible technology & performance features on BMW’s 2008-2013 M3. The M3 introduced in 2008 was the first V8 M3. Also, the first double clutch SMG transmission.
The M DCT (double clutch transmission)
The M DCT (double clutch transmission) is incredible to drive. It is actually two separate “sub-transmissions” within 1 transmission housing. It is split up every other gear 1-3-5-7 and R-2-4-6 each on its own mainshaft and clutch of the double clutch system. This allows 2nd gear to already be selected and ready to go while driving in first as soon as the clutch engages and disengages. This is all electronically controlled & hydraulically actuated. The DCT electronics combine inputs from DSC & DME control units such as engine speed (RPM) & vehicle speed to create for lightning quick shifting. Most noticeable when driving is the downshifting – the electronics automatically raise the engine RPM to match the exact road speed required to dump the clutch and engage the gear seamlessly.
Electronically Variable Suspension Damping (EDC):
This allows the driver to select between 3 different settings on the fly with a button on the center console – 1. Comfort 2. Normal 3. Sport . The selection made will change the internal valve damping rate of the strut & shock absorbers electronically.
Most impressive of the E9x M3 is the engine:
V8 that red lines at 8,400 RPM. While not uncommon for a race car engine that is rebuilt after every race, to this day, that is fairly unheard of for a reliable production engine V8 to red line at 8,400 RPM….The main reason why the engine is able to? Ionic Knock Detection: Any other engine uses knock sensors to detect engine vibration while it is running. These sensors would be typically a piezoelectric element – turning vibration frequency into an electrical signal that the engine electronics can use to adjust spark ignition timing for optimal air / fuel burning as the engine runs. This is a rough calculation of the whole engine and takes time to calculate and adjust. Through an advanced electronic control unit mounted on each engine bank, The S65 M3 Engine uses each spark plug in the individual cylinder to measure ions left after each firing cycle to adjust the spark timing individually per cylinder, and immediately for the next firing cycle based on efficiency of the previous one. This is the primary technology at hand that enables the engine to be able to reach such high RPMs without pre-ignition or detonation.
We hope you’ve learned something new in this month’s BMW technology post and as always, if you do believe you are experiencing a malfunction with your vehicle’s performance, please contact us at 8335 W Sherman St Suite #200 Tolleson AZ 85353 or call us.