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Le nouveau six cylindres en ligne équipant les BMW M3 & M4


Paul

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Les premières informations et photographies relatives à la motorisation des nouvelles BMW M3 et M4 ont fait leur apparition ici :

Revenons sur la motorisation de ces dernières : le nouveau 6 cylindres en ligne pour être plus précis.

 

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Six-cylinder in-line high-revving, turbocharged engine.

The new BMW M3 Sedan and new BMW M4 Coupe from BMW M GmbH see a return to a six-in-line engine configuration, as used on the second and third generations of this iconic sports car. The new turbocharged unit, which can develop more than 7,500 rpm, combines the best of both worlds – on the one hand a high-revving design for instant response, linear power delivery over a wide engine speed range and an unmistakable and characterful engine note, and on the other hand BMW TwinPower Turbo technology for maximised torque over a broad rpm range. A further hallmark of this engine is its outstanding efficiency.

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More power, more than 30% increase of torque, more than 25% increase of efficiency.
 
The new engine sees a slight power upgrade over the previous V8 to approximately 430 hp, while peak torque has been increased by well over 30 per cent to substantially more than 500 Newton metres, and is maintained over a very wide rev band. The new powerplant also boasts excellent fuel consumption, with an improvement of more than 25 per cent over the previous model’s figures, while emissions are already EU6-compliant.

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BMW M TwinPower Turbo technology.

The BMW M TwinPower Turbo technology comprises two mono-scroll turbochargers, High Precision Direct Injection, VALVETRONIC variable valve timing and Double-VANOS seamlessly variable camshaft timing. The variable valve and camshaft timing provide fully variable control of intake valve lift. This allows the engine to deliver its power smoothly and efficiently, resulting in lower fuel consumption and emissions. At the same time, throttle response is even sharper than before..

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Optimized responsiveness through impulse charging. Flow-enhanced manifolds. Charge pressure control designed to optimize dynamics. Electric wastegate actuator for high precision.

Optimized crankcase and crankshaft design.

The six-cylinder engine features a closed-deck crankcase design, which increases rigidity and allows cylinder pressures to be increased for maximised power output. And instead of liners, the cylinder bores feature a twin-wire arc-sprayed coating, which results in a significant reduction in engine weight.

 

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Crankcase.

 

The six-cylinder engine features a closed-deck crankcase design, which increases rigidity and allows cylinder pressures to be increased for maximised power output. And instead of liners, the cylinder bores feature a twin-wire arc-sprayed coating, which results in a significant reduction in engine weight.

 

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Crankcase.

 

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The engine oil supply system, too, reflects the extensive motor sport experience of BMW M GmbH. The low-weight magnesium oil sump, for example, features a special cover to limit movement of the oil under the effects of strong dynamic lateral acceleration. Under extreme longitudinal acceleration and deceleration, an oil extraction pump and a sophisticated oil return system situated close to the turbocharger likewise help to maintain uninterrupted oil circulation. Oil is therefore supplied continuously to all engine components in all driving situations – whether in everyday motoring or during hard driving on the track.

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ce moteur est un vrai M, on n'aurait pu croire à un N55 à peine modifié, il n'en est rien, à part la fonderie du bloc, on n'a affaire à un vrai moteur M, avec vilbrequin typé course, cullasse, turbo, collecteurs, admission, refroidissement, échappements spécifiques, pistons forgés et alliage précieux et qui prend ses tours :oui: une très bonne nouvelle, car j'avoue que ça me faisait un peu peur...

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oui ca a l'air d'etre un bon moteur ... voir a combien ca coupe , 7500 ou plutot 7900 hihihi car + de 7500 ca veux rien dire et puis voir aussi les courbe car si il n'ya pas de puissance suplemenatire a partir de 6000 tr alors ca ne sera que l'allonge... bref il faut encore attendre..

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Intéressant le tableau. Plus de 2x la puissance et le couple pour la M3 F30 par rapport à la M3 E30 pour tout autant autant de C02 ... Que les écolos arrêtent de nous faire ch*** :W :W

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Intéressant le tableau. Plus de 2x la puissance et le couple pour la M3 F30 par rapport à la M3 E30 pour tout autant autant de C02 ... Que les écolos arrêtent de nous faire ch*** :W :W

Ouais enfin je sais pas d'où BMW sort ces chiffres de pollution, parce que c'est la puissance et le couple d'une M3 E30 catalysée, mais la version 200 ch, soit sans cata, est donnée pour 193 g/km.
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