Seven-point gasoline turbocharged engine

Since 1996, Volkswagen has been turbocharged to the country for nearly 20 years. Under the constant respect of manufacturers, this bright spot technology has been more prevalent in the home economic model than the original “Wang Xietang Qianyan”. Power, low fuel consumption and attract consumers' attention. Even so, many consumers are still full of doubts when they buy the "T" model: Does it really reduce fuel consumption? Is the maintenance cost high?

In response, Gasgoo.com categorizes consumers' doubts into seven issues and interviews Dr. Gu Ronglei, Global Director of Honeywell Transportation Systems Group, a global manufacturer of engine booster systems. .

Question one: Many small-displacement models have "T". So can a turbocharged engine really make it more powerful? How does it achieve this effect?

Honeywell: The so-called "turbocharger" technology is to use a turbine device that allows the automotive exhaust gas to be recycled to increase the cylinder's intake pressure and density, thereby increasing the engine's power, in the case of unchanged volume Ordered more power. Compared with naturally aspirated engines, turbocharged engines can increase the maximum power of the engine by 30%-60%, and even newly developed supercharged engines can reach 100%, so it can be comparable to small-displacement engines. The power level of higher displacement vehicles can also reduce CO2 emissions by 10% to 20% in emissions. In general, its effectiveness is similar to that of a blower used with coal stoves.

Doubt two: turbocharger in the working state, the temperature is higher, once the oil spill will cause security risks, how to ensure the safety of manufacturers?

Honeywell: First of all, turbochargers have a special design for oil spills and have undergone rigorous testing before leaving the factory. Under normal use conditions, the booster leak can be ignored. A very small amount of oil mist will flow back to the cylinder together with the pressurized air to be burned and will not leak. In addition, when designing, the high-temperature base points of the turbocharged and naturally aspirated engines are basically the same, and when running at high speed or high load, the maximum temperature reached by them is relatively close. There are thermal insulation devices around the turbocharger. At the same time, we also designed an efficient cooling device for the supercharger so that there will be no hidden danger due to high temperatures.

Question 3: Do turbocharged models have higher requirements for oil? Will the cost of maintenance and repair of turbocharged models be much higher than that of ordinary models?

Honeywell: We generally design according to the label of the manufacturer's oil. It is not because there is a high requirement for the composition of the oil in the supercharger. The oil on the market can basically be used. But it is worth mentioning that a good engine oil is more conducive to the maintenance of accessories. Usually, there are good additives in the synthetic motor oil to eliminate dirt in the oil and make it more lubricated, whether it is an engine or a supercharger.

As for maintenance costs, first of all, turbo is not a maintenance part. Moreover, its design life is comparable to that of the engine, and no additional maintenance or replacement of the turbocharger is required during the engine life cycle. The turbocharger is a high-tech product that operates under harsh conditions such as high temperature and vibration. It is hoped that users will perform normal maintenance on peripheral components such as air filters, lube oil filters, and lubricants themselves in accordance with the manufacturer's requirements, avoiding these zeroes. The failure of the component causes secondary damage to the turbocharger. If problems arise due to improper use or accidents, the 4S shop is not capable of repairing and can only be replaced directly. Fortunately, the turbocharger is in the "three guarantees" range, consumers can rest assured.

Question 4: How long is the turbocharged life? Under what conditions do turbocharged engines need to be replaced? How to maintain the usual?

Honeywell: In the rumors of turbocharged models, the statement that “sooner or later to change turbines” really scares many people. In fact, turbocharging and engine life are equal. It can be said that the turbine is one of the most reliable components in the entire vehicle life cycle. If it is not used improperly, it does not need to be replaced.

If there are consumers who pay special attention to the maintenance issues, we hereby make three suggestions: 1. For the well-applied engine oil mentioned earlier, it is recommended to select a high-quality synthetic motor oil that is resistant to high temperatures and oxidation, and also pay attention to appropriate shortening. The replacement cycle of oil; 2, in the winter cold start, we must first warm up the vehicle; 3, should be done in time to replace the oil filter and air filter, while carrying a car to do regular inspections.

Doubt 5: Can the "T" model not be able to exert its dynamic performance when driving at low speeds in urban roads? Does a manual gear turbine have to shift gears at high speeds?

Honeywell: The traditional "turbocharger" is pursuing high power and requires intervention at high engine speeds. As the turbocharging technology matures, the operating conditions of the turbocharger are reduced, so that turbocharger can smoothly intervene at low engine speeds. The turbocharger is almost started when the transmission enters second gear. jobs. Therefore, with the "T" model is equally suitable for driving on low speed or urban roads.

As for the manual shift shift timing does not need to pay special attention, the general owners to shift to reach 1500 rpm, turbocharger has been working at this time, for faster shifting customers, we recommend the best when opening a turbocharged vehicle To mention more than 1500 shifts, to get a better sense of acceleration. Because the turbocharged engine has excellent low-speed torque characteristics, the increase in torque when the vehicle speed is reduced can avoid unnecessary frequent shifts and can make manual transmission easier to drive.

Doubt 6: Before the turbine model was stopped, it was necessary to idle for a while to turn off the engine. Has this problem been solved?

Honeywell: The old-fashioned turbo-charged vehicles did indeed require users not to turn off the engine immediately after a long period of high-speed driving. The engine must be kept running for a few minutes in order to prevent overheating of the turbocharger. At present, this problem has been solved. We have a cooling circulation system inside the turbocharger. After the engine is shut off, the cooling of the turbine can still be continued until the safety value is restored. The owner can turn off the engine as normal without having to idle for a while.

Question 7: Now that there are many turbocharged cars in the market, how can we distinguish between good and bad turbocharged engines? Turbocharger can be modified?

Honeywell: If you are a professional consumer, you can first try to see the speed of the response of the next vehicle, judging by driving experience. If it is an ordinary consumer, you can look at the parameters of the engine. Among them, there is the maximum torque at which speed segment, the same large torque, and the smaller the speed value, the better the response.

For the refitting, it is necessary to first check whether the requirements of the road regulations are complied with, and to avoid passing the vehicle inspection after the refitting, which will affect the road. In terms of conversion, not all cars can be equipped with turbochargers when they are refitted, depending on the engine's tolerance. If the engine itself can only withstand 100 kilowatts of power, if you let it withstand 130 or more, it will certainly damage. The final conversion must be performed by a qualified professional company in order to obtain a reliable quality assurance.