[YesAuto Engine Technology] The new BMW X1 (hereinafter referred to as X1) is switched from the rear-wheel drive platform to the UKL front-wheel drive platform. This change can be regarded as a big change from the inside out. In addition to the platform changes, the engine has also been updated. Although the displacement is the same as 2.0 liters, the new development has given this level a new codename-B48. In accordance with BMW's modular design concept, this new 2.0T engine code-named B48 will be matched to the new X1. So the question is, what are the advantages of the new engine? What is the difference with the previous N20?
● Analysis of BMW B48 Engine
What is the difference between the brand new B48 and the 2.0T engine code-named N20 before? The logic of BMW engine code naming can reveal some information to us.
After talking about the engine model, let's take a look at those “different places” compared to the previous ones. Since this B48 engine is a product of modular design, what exactly is BMW's modular design? In fact, it is very simple: different models of engines all use cylinder units with the same cylinder diameter, the same stroke, the same cylinder spacing, and the same displacement. The displacement and power output are determined by the number of cylinders, and the engine is “played into Lego blocks.” In the field of engine design in the future, modular design has many unparalleled advantages in traditional engine design: the parts of engines with different displacements are universal, and it is easier to match each displacement in different models.
After BMW's research and development, the official believes that the BMW B-series engine should be designed with a single-cylinder 500mL displacement to be the most reasonable. In the previous article, we discussed this development trend. But there are exceptions to this. The B38A12A 1.2T three-cylinder engine mounted on the MINI ONE model does not follow this principle, while the 1.5T three-cylinder engine (B38A15A), which is also the B38 series, strengthens the concept of a single-cylinder volume of 500mL.
This B48 engine is a good interpretation of the platform and modular concept. The higher degree of integrated parts is also the biggest difference between B48 and N20. So what are the specific differences?
BMW and Continental have jointly developed a turbocharger for the 1.5T B38 engine, focusing on optimizing the intake temperature control of the supercharged engine. However, we have not fully grasped the information about the B48, but based on the concept of modular development, Similar original intentions will also be reflected on the B48.
In addition, the B48 engine is divided into air-cooled and water-cooled according to the difference in the horizontal and vertical layout of the intercooler. The longitudinal engine structure uses a water-cooled intercooler, while the horizontal engine layout (UKL front-drive platform) such as the new BMW X1 uses an air-cooled intercooler.
● Compared with N20 data
BMW X1 20i engine data comparison (matching B48 and N20 engines respectively)
|The second generation BMW X1 20i (F48)||The first generation BMW X1 20i (E84)|
Compared with the N20, the B48 has achieved a replacement of the BMW 2.0T powertrain by changing some mechanical structures, adopting a higher integrated design and optimizing some of the problems on the N20. In comparison, B48 has a compact structure, highly integrated parts, high parts versatility and high installation compatibility, and there is a little improvement in data.
● Comparison of the same level
If it is the direct competitor of the BMW X1, it must be the Mercedes-Benz GLA and Audi Q3, both of which belong to Germany. As a high-end German brand compact SUV, Mercedes-Benz GLA and Audi Q3 adopted a horizontal platform in this class of cars early. The new BMW X1, a “post-professional”, abandoned the original vertical rear-wheel drive platform. , To invest in a structure that is more similar to that of its competitors, does it come from behind? Or is it too late? We choose the 2.0T displacement low-power version of Mercedes-Benz GLA, Audi Q3 and the new BMW X1 low-power version (BMW X1 20i) for a comparison.
|Same level comparison|
New BMW X1 20i
Audi Q3 35TFSI
BMW has pushed its 2.0T four-cylinder engine into the “B” era. To be honest, in terms of technical configuration, the B48 and the previous N20 engine have not changed too much. The goal is to improve efficiency and reduce carbon emissions. Technical optimization of the series. In addition, the B48 engine conforms to BMW's platform-based development trend and widely adapts to the needs of horizontal layout. The four-wheel drive system provided on this basis can also meet the driving needs of some people on non-paved roads. We look forward to the B48 2.0T engine of the BMW models. However, everyone has different opinions on the 2.0T four-cylinder engine of the BMW X5 and 7 series. However, the market value of entry-level power is immeasurable. (Auto House Text/Tu Shuning)