In recent years, the upsurge of turbocharged engines has continued to rise, and even many brands that once focused on naturally aspirated have also switched to turbocharged engines. Especially for some young people who have just bought a car, the increase in power brought by turbocharging is undoubtedly an irresistible temptation. The “T” logo that can be seen everywhere seems to convey a message to people: the turbo era is unstoppable. It is true that turbocharged engines have many advantages, but in the course of daily use, it will also increase the cost of our car. Let’s talk about the advantages and disadvantages and maintenance of turbocharged engines.
Looking at the entire automotive market, turbocharging has become more and more a trend, and our protagonist today, Beijing Auto Saab, is also equipped with three turbocharged engines including 1.8T, 2.0T, and 2.3T.
BAIC Saab is based on Saab 9-5’s GM2900 platform design, but it has been lengthened according to the characteristics of Chinese consumers. The wheelbase of the original car has been lengthened from 2703mm to 2755mm, and the size of the vehicle has reached 4861mm×1820mm×1462mm.
■Why choose a turbocharged engine?
Turbocharger is actually a kind of air compressor, which increases the intake air volume of the engine by compressing air. The direct benefit it brings is undoubtedly the improvement of motivation. Under the premise of the same displacement, the turbocharged engine can be nearly 40% higher than the naturally aspirated engine. Take this Saab for this test drive as an example. Equipped with a 2.3T engine, it has a maximum power of 184kw, which is close to a 3.0L naturally aspirated model.
Under the premise of the same displacement, the turbocharged engine has higher combustion efficiency and more power. In daily use, when the turbine intervenes, it directly transmits faster acceleration to the vehicle, which is what we call the push back feeling, which brings a more enjoyable driving experience.
In addition, with the introduction of favorable policies for small-displacement vehicles such as energy saving and emission reduction, the advantages of small displacement and high power of turbocharged engines have been fully utilized in many new models. Of course, this does not affect the cost of car owners too much, but it can become a major factor for major manufacturers to choose turbocharged engines.
■What are the disadvantages of turbocharged engines?
For car owners, the biggest drawback of turbocharged engines is the high maintenance cost. Because turbocharged engines have high requirements for oil lubrication and cooling effects, they generally need to use fully synthetic engine oil for maintenance, which increases maintenance costs.
In addition, turbocharging has higher requirements for the strength of the engine block, but the maturity of the technology has not reached the level of a naturally aspirated engine, so the failure rate will increase. Because the turbocharging method will bring higher combustion temperature to the engine, in theory, the life of the turbocharged engine is relatively short, and the maintenance cost will be higher.
In daily driving, although turbocharged engines can bring strong power, the obvious feature on most models is the existence of turbo lag. Of course, for some high-end luxury models, the lag is not significant.
But for general-priced models, the timing of turbo intervention may not be satisfactory. This requires friends who are interested in buying a car to make a decision after the test drive. Taking the BAIC Saab as an example, the 2.3T engine does not have a significant sense of lag during actual driving, and the power response is relatively positive. Vehicles at this level are already high-quality products, and I have seen the successful application of independent brands in turbine technology.
Generally speaking, the advantages and disadvantages of a turbocharged engine are more distinct. From my personal point of view, I prefer the driving pleasure it brings. However, the maintenance cost is also a problem that car owners cannot ignore. Let’s take a look at the maintenance of turbocharged engines.
The maintenance and repair costs of turbocharged engines have always been a major drawback of it. This is not a factor that the car owner can determine, but we can effectively protect the engine through daily care of the vehicle, thereby saving costs. .
■Selection of oil and fuel
Generally speaking, the damage of the turbocharger is usually due to the damage of the oil seal between the turbocharger and the intake pipe, which leads to large-scale oil burning. A large part of the damage to the oil seal is because the owner did not change the oil on time or used inferior oil. , The main rotating shaft of the floating turbine cannot be lubricated and dissipated normally, which will damage the oil seal and cause oil leakage at high temperatures.
Therefore, it is necessary for the owner to change the engine oil in time and insist on choosing a fully synthetic engine oil with better oil quality to meet the normal operation of the engine. It is important to note that high-end lubricating oil is indeed better than low-end lubricating oil in terms of anti-oxidation and anti-emulsification ability, but do not extend the replacement cycle too much, otherwise it will not be able to perform the functions of high-quality oil.
At the same time, turbocharged engines have higher requirements for fuel quality. The BAIC Saab clearly marked it on the fuel cap, and the car is suitable for No. 95 (formerly No. 97) gasoline.
■Keep the turbine clean
The cleaning of the turbine mainly relies on the air filter element and the oil filter element. Timely replacement of these two components can effectively avoid the excessive wear of the turbocharger due to the absorption of the magazine, thereby increasing the life of the turbine and allowing the vehicle to run more stably.
The turbo seems to be a bit “squeaky”. Perhaps many car owners have begun to worry about whether their vehicles are in a normal state. The turbocharger equipped on the dashboard of BAIC Saab can clearly show the working status and real-time values of the turbo. intimate.
■Cold start and flameout
First of all, we need to make it clear that the turbine is a high-speed running component, and it needs real-time protection of the oil. Therefore, during a cold start, we recommend that the owner go on the road after a short period of warming up, so as to effectively ensure the full supply of oil, especially for the north For car owners, it is more important to heat the car correctly.
When the engine is stopped, the temperature of the turbine is very high, so the owner should idle at the same place for a while before turning off the vehicle. When idling, the oil and cooling system are working, which can effectively reduce the turbine temperature and play a protective role.
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