By, smartwatches 10/04/2023

BMW 4 Series Gran Coupe New "M440i", 3.0 straight 6 turbo 374 horsepower

BMW announced on June 9 that it will set the high-performance grade "M440i xDrive" to the new "4 Series Gran Coupe" for Europe.

◆ 0-100km/h acceleration is 4.7 seconds

The new model is equipped with the M440i xDrive as the top grade that pursues class-leading driving dynamics. The 3.0-liter in-line 6-cylinder gasoline turbo engine is specially tuned by M Performance Automobile. As a result, in the case of the European specification, the maximum output is 374hp/5500~6500rpm and the maximum torque is 51kgm/1900~5000rpm.

The transmission is an 8-speed AT “Steptronic Sport” and the drive system is 4WD “xDrive”. The M440i xDrive accelerates from 0 to 100km/h in 4.7 seconds, with a maximum speed limit of 250km/h.

It is also equipped with "M sports brakes" and 18-inch M aluminum wheels with 245/45R18 size tires. From urban driving to circuit driving, we take pride in responding to intuitive brake operation and demonstrating outstanding braking performance. The system has a sporty set-up with short pedal strokes and well-defined pressure points. It is said that it is highly resistant to heat during braking and achieves high braking capacity.

In addition, the M sports brakes are equipped with a front four-piston fixed caliper designed with a more direct brake ratio and a separate hydraulic circuit, and a rear single-piston floating caliper.

◆ 48V mild hybrid with electric overboost function

In addition, a 48V mild hybrid was introduced to this 3.0-liter in-line 6-cylinder gasoline turbo engine. It is said that it helps to reduce the load on the engine and increase the power output.

By installing a powerful 48V starter generator and battery (secondary battery), the energy regenerated during braking is stored in the battery as electricity. A 48V starter generator produces an additional 11hp of power. This electric power produces driving force that assists the engine during acceleration.

The 48V starter-generator acts like an electric drive unit assisting the engine, keeping it as efficient as possible. Meanwhile, the electric overboost function enables dynamic performance when accelerating at full throttle.

BMW 4シリーズグランクーペ新型に「M440i」、3.0直6ターボは374馬力

In addition, the 48V starter generator can automatically stop and restart the engine. It has the advantage of being able to stop the engine with less vibration and restart it more smoothly. This allows the engine to be completely shut off in coast mode at low loads, such as when driving on the highway, without disconnecting the engine from the drivetrain.

◆M sports differential

Suspension is a double-joint spring strut at the front and a 5-link at the rear. The damper progressively adjusts the hardness of the stepless variable damper according to the spring stroke.

The "M Sports Differential" uses an electronically controlled continuously variable locking function integrated into the rear differential to improve traction and cornering performance. In addition, the active differential lock function has the effect of enhancing driving stability and agility.

The DSC (Dynamic Stability Control) system also limits the differential between the inside and outside rear wheels during cornering, optimizing power transmission in all driving situations. A differential locking function generated by the electric motor allows driving torque of up to 1500Nm to be transferred from the faster spinning wheel to the slower spinning wheel.

For example, when driving around curves at high speed, a tendency to understeer may occur. For that reason, the driving force that cannot be transmitted to the road surface of the wheel on the inside of the curve, which has lost grip and is spinning, is intentionally distributed to the wheel on the outside of the curve instead of activating the brakes to disable it. . This allows the vehicle to dynamically enter curves and utilize drive torque for sporty driving.

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