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New Buick LaCrosse upgrades computing power from 17 to 31 ECUs; new electronic control system

The all-new Buick LaCrosse, which launches this week in China, features significant upgrades in computing power and networking to advance connectivity and safety features.

There are 31 ECUs distributed in the all-new Buick LaCrosse—its predecessor utilized only 17. This 82% increase in the number of ECUs helps to optimize calculating efficiency. In order to facilitate the handling of large quantities of data, a specific data bus is arranged to connect ECUs, each of which can process data independently.

The LaCrosse’s all-new, more robust electronic control system includes eight in-car data Controller Area Network buses (CAN bus) that enable the interaction of the vehicle’s electronic systems, microcontrollers, sensors and software to perform handling, safety and connectivity operations seamlessly for the owner. The in-car data buses form a local area network (LAN) to connect the nodes and sensors of the different Electronic Control Units (ECUs).

When a vehicle is in motion, a vast amount of data is being rapidly transmitted and calculated to generate instructions that are often unnoticed by the driver, such as data from the transmission as it shifts gears or even temperature sensors to alter in-cabin comfort.

The current Buick LaCrosse has been the segment leader in China in the introduction of intelligent safety features that include Adaptive Cruise Control, Lane Change Alert, Lane Departure Warning and Collision Imminent Braking. The all-new LaCrosse introduces additional safety functions such as Pedestrian Detection, Lane Keep Assist, Following Distance Indicator, High Beam Alert and Advance Park Assist.

The all-new Buick LaCrosse has also upgraded the hardware and software of its intelligent safety systems. It features a megapixel front camera, all-new long-distance radars and sensors, and added external object calculation modules (EOCM). The previous distributed intelligent safety mechanism has now become an integrated one, ensuring a faster and more precise decision-making process.

For example, if the all-new Pedestrian Detection system identifies a pedestrian directly ahead and a collision is imminent, the system alerts the driver and, if necessary, automatically applies the brakes to help reduce the collision’s severity or avoid the collision.

The second-generation continuous damping control (CDC) system scans road conditions at a frequency of 100 times per second, with real-time damping adaptations made accordingly to guarantee optimized comfort and handling.


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