Top 10 Turbocharger FAQs – From Garrett Turbocharger Collection

Do turbocharged models really have “hysteresis”?

The so-called hysteresis is the time it takes for the engine to output the corresponding power from the moment we step on the accelerator pedal. All engines need this response time.

Early turbocharged engines had obvious hysteresis due to the lack of direct injection and the use of high-boost and large turbines in pursuit of performance. Today’s turbocharged engines generally use direct injection technology, and low-boost technology is also used. The turbo hysteresis phenomenon has been greatly improved and is almost imperceptible in daily ordinary driving. The 1.5T supercharger of the 560 adopts a light-weight and small-sized turbine design, which responds instantly and starts powerfully.

Turbocharged models do not work when driving at low speeds, and only provide power when running at high speeds?

The earlier the engine is involved at low speeds, the earlier the supercharger will work. Honeywell uses the second-generation gasoline turbocharger on the Baojun 560 and 730, which adopts aerodynamic design and integrated bearings to greatly improve the instantaneous responsiveness of the engine. Small impeller improves low-speed response performance, allowing the supercharger to start working at 1000 engine rpm, and reach the maximum torque of a 1.5-liter naturally aspirated engine at 1100 rpm. It accelerates quickly and can output 220N*M at 1750 rpm.

Why are turbocharged engines more powerful than naturally aspirated engines?

“The greater the pressure, the greater the power” is a true portrayal of turbocharging. The biggest advantage of a turbocharged engine is that it can greatly improve the engine’s power performance without increasing the engine displacement. Compared with naturally aspirated gasoline vehicles with the same rated power, the improvement in fuel efficiency of turbocharged diesel vehicles can reach up to 40%, and that of turbocharged gasoline vehicles can reach up to 20%.

The 1.5T on the Baojun 560/730 reaches a peak torque of 230N.m at an engine speed of 1750, which is comparable to the acceleration ability of a 2.4L naturally aspirated engine.

Are turbocharged models more fuel-consuming or more fuel-efficient?

If we take “fuel economy” as the concept of fuel saving, that is, the ability of a car to run economically with the least fuel consumption while ensuring power, then in general, compared with naturally aspirated engines, turbocharging technology can help gasoline engines improve fuel economy by 20%, and diesel engines improve fuel economy by 40%, and can provide the same or even better power performance as the large engines they replace.

If the actual power output, that is, the power from the perspective of power, the power of a 1.5T engine is equivalent to the power of a 2.0L naturally aspirated engine, and the 1.5T certainly consumes much less fuel than a 2.0L engine. From the data of Baojun 560, the fuel consumption of 1.5T per 100 kilometers reaches 6.8L, so the saying that turbocharged engines are fuel-consuming is not reliable.

Do turbocharged models have higher requirements for engine oil?

There is no need to worry about this. Garrett turbochargers do not require a special engine oil for maintenance. Just choose a quality-assured engine oil according to the maintenance manual required by the vehicle manufacturer.

Will the maintenance cost of turbocharged models be much higher than that of ordinary models?

The turbocharger is a standard component of the engine system and is maintained together with the engine. There is no need to maintain this component separately. In a word, the turbocharger has the same lifespan as the engine. During the life cycle of the engine, there is no need to perform additional maintenance and replacement of the Garrett turbocharger.

Turbochargers are products that work under harsh conditions. Is the reliability guaranteed?

Garrett turbochargers work under high-speed vibration and high temperature and are directly exposed to automobile exhaust. The key to ensuring reliability lies in material and structural design. Honeywell turbocharging technology has a deep aerospace background. The aviation-grade materials used by Honeywell can ensure its stability even when the turbocharger speed reaches 350,000 rpm and the temperature is as high as 950-1050℃. The quality is guaranteed after 800 deep thermal shock tests verified by the General Motors standard system.

Will the turbocharger have the quality risk of oil leakage?

First of all, we need to understand the cause of the oil leakage problem. During the actual operation of the supercharger, the engine oil is required to provide lubrication and cooling. Due to the structural design of the supercharger and the blockage of the air filter pipeline,

the supercharger may leak oil?

Honeywell’s supercharger adopts an optimized structure in design, such as the unique piston seal ring and oil baffle design, which can significantly improve the oil sealing ability. After a rigorous long-term test and assessment of Wuling engines, it can be said that this problem has been eliminated.

Turbocharged models need to warm up the car for a while when starting, and idle for a while before turning off after parking, otherwise it will damage the engine?

The habit of warming up the car is more helpful to extend the life of the engine, including naturally aspirated and supercharged engines, but it only takes a few seconds to complete. At room temperature of 20 degrees Celsius, the engine oil only takes 1 second to rush into the bearing, establish an oil film, and avoid dry friction. Even at minus 30 degrees in winter, the oil supply time is within 5 seconds.

Idle speed is a habit left by the old generation of superchargers, requiring users not to turn off the engine immediately after a long period of high-speed driving, and to let the engine continue to run for a few minutes, in order to prevent the turbocharger from overheating and malfunctioning. But now the latest turbocharged models have a cooling circulation system inside the turbocharger. When the engine is turned off, the turbocharger can continue to be cooled until it returns to a safe value. The owner can just turn off the engine normally without having to keep it idling for a while.

The life of the turbocharger is only 5 years?

The life of the turbocharger is the same as that of the engine. It can be said that the turbocharger is one of the most reliable components in the entire life cycle of the vehicle. If it is not used improperly, it does not need to be replaced.