For SUVs, fuel economy has become the direction of future development under the premise of ensuring safe off-road performance. Great Wall Motor teamed up with Bosch in Germany to develop an electronically controlled high-pressure common-rail diesel engine, the “Intelligent Fuel-Saving Kingâ€. It was first assembled on the Great Wall Harvard CUV and Fengjun High-end Pickup. The market reflected surprisingly good. Fuel saving." So what are the advantages of this engine? Bosch and Great Wall Motors responded with practice.
Tianmashan Great Wall and Bosch Diesel Power Test
On March 27th in Shanghai Tianmashan Stadium, 22 Haval CUVs equipped with “Intelligent Fuel-Saving King†electronically controlled high-pressure common-rail diesel engines, “Wind Jun†pickups were swayed on the professional runway to show its power to the world. performance. This is the “New Diesel Power Test Experience Meeting of the Four Seas Great Wall Car Pentium World Heart†jointly launched by Great Wall Motor and Bosch.
The fuel consumption test is the highlight of this test. Under the supervision of the authoritative media, a diesel Haval and a wind Chun pickup stuck 5 liters of No. 0 diesel, and ran 5 laps at the Tianmashan F3 circuit, with 2.063 kilometers per lap, totaling 10.3 kilometers. Haval and Feng Jun respectively. The fuel consumption is 530, 500 ml, and the fuel consumption per 100 kilometers is less than 5.2 liters. Professionals pointed out that although there are no traffic lights and artificial influence factors on the Tianma Mountain track, there are more than 50 turns in the 5 laps, of which 180 turns are up to 25, requiring multiple shifts and brakes, and the test of the day. The wind power is level 4, and these factors increase the difficulty of fuel economy. The field test results are not much different from the fuel consumption announced by the manufacturer.
The "Intelligent Fuel-Saving King" power test is even more exciting. Under the guidance of professional coaches, the reporter drove the Haval diesel car to carry out power tests, snake-shaped winding piles, F3 track crossing, and off-road experience in the Tianma Mountain stadium. . Under the guidance of the coach, starting, accelerating, sharp bending, Harvard responded sensitively, and with the help of one command, the reporter personally felt the power output of this diesel engine with high torque, and also had a deeper layer of acceleration at low speed. Awareness. The off-road experience also allowed the reporter to witness the heavy leather and the ability to adapt to the road.
At the technical briefing, experts from Bosch in Germany gave a detailed introduction to the advanced nature of the “Electronic Control High Pressure Common Rail†technology. (See also materials) Bosch engine experts pointed out: INTEC "Intelligent Fuel Saver" is the product of the perfect cooperation between Great Wall Motor and Bosch. This engine with electronic direct injection technology is equipped with Bosch common rail system, which reflects the latest technology in Europe and America. Diesel technology, high torque and low speed, and its good acceleration and energy saving are unmatched by traditional diesel technology. â€
It is understood that as early as two years ago, the Great Wall has been keeping a close eye on the highest level of diesel power in the world. At the beginning of 2005, they chose to join the German Bosch BOSCH company with leading diesel engine technology, becoming the first car manufacturer to use common rail technology in China. After the engine was assembled, Haval won the users with remarkable fuel economy, low speed and high torque. It also subverted the traditional image of domestic SUV and won the competition with the joint venture brand. Less than three months after the launch of Diesel Haval, it has bucked the trend in the overall downturn of the SUV. It only sold 7,000 units in two-thirds of the country, which set off a new boom in diesel SUV development. The industry commented that the electronically controlled high-pressure common rail diesel engine is an important technological revolution of the core power of its own brand.
At the event, Great Wall Motor Market announced two important decisions:
In order to reassure users, the warranty period for the main components of the Great Wall “Smart Fuel Saver†diesel engine has been extended from 2 years and 50,000 kilometers to 3 years and 80,000 kilometers. This warranty period is ahead of the industry's after-sales service period. The relevant parties of the Great Wall said: After the successful development of this engine, we carried out a 750,000-kilometer endurance reliability intensification test, specially built a high-level laboratory for it, and invested 20 million yuan to introduce core R&D equipment such as engine dynamometer. To ensure the accuracy and reliability of the whole machine, we have the confidence to make such a decision.
In addition, this year's "smart fuel-efficient king" engine must match the entire series of the Great Wall. In the second half of the year, the "Intelligent Fuel-Saving King" Deere, Sailing Pickup, and Sai Ying, Sai Jun and other SUVs of less than 100,000 yuan will be introduced to the market. The Great Wall should take the lead in launching its own brand pickup and SUV banner! Drive the development of the whole industry and save the national economic SUV.
Background information
Great Wall TC diesel engine
The full name of TC diesel engine is INTEC "Intelligent Fuel Saver", IN is the first two letters of English intelligence, TEC is the first three letters of Technique, and the first letter of Economize is also included. Innovative and economical technology, TC (Turbo Common Rail) supercharged common rail technology features are also embedded in it, the last C also represents the Great Wall. Referred to as TC.
Great Wall TC R&D test situation
In order to build the core power, the Great Wall cooperated with Bosch, the German company with the most advanced technology level. In the one-and-a-half-year research and development, the investment reached 150 million yuan. The TC engine production line is designed to have an annual production capacity of 60,000 units. The core components of the electronically controlled high-pressure common rail system of the machine are directly imported from Bosch, Germany, and other parts are purchased globally and manufactured by the Great Wall Internal Combustion Engine Factory. To provide the most advanced diesel power to users. Great Wall has built a high-level laboratory for this R&D project, and invested 20 million yuan to introduce core R&D equipment such as engine dynamometer, emission meter and vehicle dynamometer from Austria AVL, ensuring high starting point and high standard of R&D work. It also makes the accuracy of the product more stable and reliable, and effectively controls the product quality of the whole machine.
After the successful development of the TC engine, the Great Wall organized experts and technicians to carry out a full-speed full-load full-load 800-hour simulation of vehicle reliability test in terms of overall performance, fuel consumption, power, and emissions. In addition, the three Haval vehicles equipped with TC diesel engines are from the ice and snow - the Heihe River at 35 °C, the Kunlun Mountain Pass at an altitude of over 4,700 meters, to the temperature of 50 °C, the Turpan Basin known as the "fire stove", and the road test journey is more than 100,000 kilometers. Strictly completed the "three high" calibration test. At the same time, according to the requirements of Bosch, the road reliability test of 750,000 kilometers was completed, and it was confirmed that the TC had excellent performance in terms of fuel economy, dynamic stability, noise and environmental protection.
Experts interpret "electrically controlled high pressure common rail"
After the Haval diesel version went on the market, many potential customers asked what technology was “electrically controlled high pressure common railâ€, and the engine experts answered this question:
INTEC "Intelligent Fuel-Saving King" engine is the first diesel engine of Great Wall Motor and Bosch in Germany. It is the first domestic diesel engine with international advanced electronically controlled high pressure common rail technology. Its technology is obviously superior to the traditional turbocharged diesel engine, which is 8% higher than the traditional turbocharged diesel engine, 10% lower carbon dioxide emissions, and 15% lower in noise. It has completely changed the diesel engine in people's minds, "noisy, black smoke" Image. This engine has been successfully matched on the Harvard CUV and the high-end pickup truck.
"Electronic control" means that the fuel injection system is controlled by a computer. The ECU (commonly known as the computer) precisely controls the injection quantity and injection timing of each injector, which can optimize the fuel economy and power of the diesel engine. Balance, while the traditional diesel engine is controlled by machinery, the control accuracy can not be guaranteed.
“High pressure†means that the pressure of the fuel injection system is 1.1 times higher than that of the conventional diesel engine, and the highest can reach 145 MPa (while the traditional diesel engine injection pressure is 60-70 MPa). The pressure is large and the atomization is good enough to burn, thus improving the power. In the end, it achieves the goal of fuel economy.
The “common rail†is to supply the fuel injectors through the common fuel supply pipe. The fuel injection quantity is accurately calculated by the ECU, and the fuel of the same quality and the same pressure is supplied to each fuel injector to make the engine run more smoothly, thereby optimizing the diesel engine. Comprehensive performance. The traditional diesel engine is injected by each cylinder, the injection quantity and pressure are inconsistent, and the operation is uneven, resulting in unstable combustion, high noise and high fuel consumption.
In addition, the INTEC diesel engine is equipped with a GSK preheating system that can be easily started at -35 ° C. The turbocharger equipped with Mitsubishi Heavy Industries increases the intake air volume to make it burn more fully and reduce the emission of harmful substances.
The engine's biggest advantage is its low speed and high torque. The 1600-2600 rpm range can deliver a maximum torque of 225 Nm. As far as urban road conditions are concerned, the performance advantages of low-speed and high-twist are also obvious. Especially in big cities, traffic jams are commonplace, and owners need to start and stop frequently. In this driving environment, the low-speed, high-twisting car not only saves the start-up time, but the most affordable benefit is more fuel-efficient.
After testing, the diesel fuel has a fuel consumption of 5.5 liters at a constant speed of 100 kilometers and a fuel consumption of 7.1 liters per 100 kilometers. It can be said that the fuel consumption of 2.8TC diesel Haval is even lower than that of many 1.6L gasoline engine cars. Among them, the "smart fuel-saving king" engine is indispensable.
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