Ideal e din nou sa cautam in manual, asa aiurea am cautat ce e drept si am gasit pt 330e , acum daca vrem sa mergem sa despicam firul in 4-5-10, la un motor "normal" nu e bun acest start/stop pe de alta parte la modele vechi clar nu exista , dar din ce tin minte BMW se lauda ca sistemul lor e "optimizat" , acum cat cum strica nu stiu daca poate cineva sa cuantifice .Daca il lasam oprit nu se strica nimic, pornit sa zicem ca avem o sansa foarte mica ( parerea mea) sa se strice ceva .
tot de la "sfantul AI"
Core Mechanical Components
Reinforced Starter Motor: Unlike standard starters, these are built with heavy-duty bearings, stronger planetary gears, and enhanced engagement mechanisms to withstand up to 10 times more start cycles.
AGM (Absorbent Glass Mat) Battery: Standard lead-acid batteries cannot handle frequent high-current discharges. BMW uses high-capacity AGM batteries that support deeper cycling and faster recharging.
Intelligent Alternator: Often part of BMW's "Brake Energy Regeneration" system, the alternator primarily charges the battery during deceleration to reduce engine load.
Electric Water & Oil Pumps: Certain models use electric pumps to maintain coolant and oil circulation while the engine is off, preventing heat soak and ensuring immediate lubrication upon restart.
The BMW B58 engine's crankshaft and rod bearings feature a special Irok/Irox coating specifically designed to mitigate the increased wear caused by the engine's auto start-stop system.
Impact of Auto Start-Stop
The auto start-stop feature, while designed to improve fuel efficiency and lower emissions, poses a potential long-term wear issue for engine bearings due to momentary lack of oil pressure during restarts.
Loss of Oil Pressure: When the engine shuts off, the oil pressure drops, and the lubricating film on the bearing surfaces can thin out. During the subsequent restart, there is a brief period with low oil pressure before the system fully pressurizes.
Increased Friction: This momentary lack of pressurized oil allows microscopic metal surfaces on the crankshaft and bearings to contact, leading to increased friction and wear over time, especially with frequent city driving stop-and-go cycles.
Special Bearing Coating: To address this, BMW uses specific bearings with an Irox polymer coating (a black coating containing a carbon-based material) on the highly stressed upper half of the rod bearings. This coating helps reduce friction and premature wear during the critical seconds of a "dry" restart.