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BMW is well known for its history of inline-six (straight-six) engines, a layout it continues to use to this day despite most other manufacturers switching to a V6 layout. . The more common inline-four and V8 layouts are also produced by BMW, and at times the company has produced inline-three, V10 and V12 engines, BMW also engineered non-production customised engines especially for motorsports ...
Some engine variants have an intercooler in addition to the turbocharger, they can be identified by the tds. [2] The M51 is an engine made of cast iron, it has one chain driven overhead camshaft [4] and two valves per cylinder. [2] [4] Compared to the M21 the M51 now has tappets and a hydraulic valve lash adjustment. [2]
Valvetronic system of the BMW N52 engine. The Valvetronic system is a BMW variable valve lift system [1] which, in combination with VANOS, allows infinite adjustment of the intake valve timing and lift. [2] [3] The system claims to improve fuel economy and emissions, and negates the need for a throttle body in regular use. [4]
The BMW B58 is a turbocharged straight-six engine, which began production in 2015. [1] The B58 replaced the N55 and was launched in the F30 340i. [2]The B58 is part of BMW's modular engine family, each engine using a displacement of 500 cc (30.5 cu in) per cylinder, following the B38 and B48 engine.
The common-rail-system is made by Bosch and also controlled by a Bosch DDE 4 ECU for non TÜ and DDE 5 ECU for TÜ. [3] All models are equipped with turbocharger and an intercooler. The 2.9L M57, which is found in E39 530d and E38 730d, as well as early models of E46 330d and E53 X5, is equipped with one Garrett GT2556V turbocharger.
Early variable valve timing systems used discrete (stepped) adjustment. For example, one timing would be used below 3500 rpm and another used above 3500 rpm. More advanced variable valve timing systems offer continuous (infinite) adjustment of the valve timing. Therefore, the timing can be optimized to suit all engine speeds and conditions. [2] [3]
In an interview with Bimmer Today, BMW M division head Frank van Meel said the future M3 sport sedan will keep using the current car's turbocharged six-cylinder motor.
Furthermore, both systems can also be combined with BMW DIVA (Differentiated Variable Air Intake) system which is the world's first continuously variable length intake manifold. As of 2017 BMW is the only company which can implement all three Variable Valve Timing, Lift and Intake Manifold in continuous adjustment form on production car.