"Power can not be used, but can not be without", I believe that this is the voice of most people who love cars and use cars, sufficient power support, not only can calmly cope with high speeds, enhance driver confidence; but also enhance driving pleasure, bring more pleasure acceleration experience. As a model with very high attention in the current domestic 300,000-class SUV market, Jeep Commander has been facing the market with the same level of leading power and off-road performance, and the 2.0T engine it is equipped with is particularly powerful from the book parameters, but what is the actual power experience? In this issue of "Tsinghua Test", the dynamics of the Jeep Commander are professionally measured and judged by the data results.
Note: The "Tsinghua Test" column is jointly produced by the School of Vehicles and Vehicles of Tsinghua University and the online car market, the vehicle test and data collection work is completely completed by the teachers of Tsinghua University using professional instruments independently, Tsinghua University provides test data, and the online car market publishes and analyzes the test results.
Note: Since the test items and data collection are all carried out in the highway traffic test site of the Ministry of Communications, the test site belongs to the confidential unit and is prohibited from shooting, so the static and dynamic photos of the vehicles used in the pictures in the article are simulated and taken off-site.
"Tsinghua Test" column has been adhering to a very rigorous test standards, the accelerated performance test used in the instrument is from the United Kingdom's Racejet RACELOGIC company VBOX III speed tester, which is currently one of the most professional instruments used as automotive performance testing in the industry.
VBOXIII. acceleration tester is a high-precision GPS-based automotive test equipment, not only can complete the data collection of vehicle acceleration, but also for speed calibration, which is also one of the most professional automotive performance test instruments in the industry, compared to most of the domestic automotive media used DBOX or PBOX and other test instruments, its test accuracy is significantly higher, the data is more accurate and true.
According to the Tsinghua test process, the two teachers will first test the overall acceleration time of the vehicle from 0-140km/h, and then accelerate the test from 60km/h to 120km/h.
Acceleration performance is the most direct and intuitive standard for measuring the dynamics of a car, and the actual measurement results of the overall acceleration of the Jeep Commander have been listed for everyone, on the whole, the acceleration is explosive and the performance is stable and continuous. The 2.0T direct injection turbocharged engine mounted by the Jeep Grand Commander is very beautiful on the book parameters, with a maximum power output of 195 kW and a peak torque of 400 Nm, which is also the strongest level in its class, which is also the hardware basis for achieving good acceleration results.
Specific to the speed segment, the acceleration performance within 60km/h is more to test the power level under urban driving conditions, Jeep Commander 0-60km/h acceleration time of 3.97 seconds, this achievement has not lost part of the pure electric model at all (the electric door pedal is the maximum torque), the body feel has a better sense of push back, the city road red light start, absolutely can do the leading one, better power response, but also help to drive more easily on the urban road with large traffic.
0-100km/h acceleration time is the most common value, Jeep Commander's measured results of 8 seconds, for a vehicle length of nearly 4.9 meters, the maintenance mass of close to 2 tons of household medium-sized SUVs, is already a very good level, many equipped with 2.0T high-power tuning engines, but smaller, lighter compact SUVs can only run to the same time. It is worth mentioning that the 8 seconds of the measured results of the 100-kilometer acceleration of the Jeep Commander are completely consistent with the official published values, and there is no result deviation because it is not the most ideal road condition, which is very reliable.
60-80km/h/, 60-100km/h and 60-120km/h mid-way re-acceleration test, intended to simulate the daily acceleration, overtaking scene, this part is easy to be ignored, but in fact, it is particularly important, after the speed up and then carry out parallel overtaking action, if the power feedback is not enough timely, it is easy to cause rear-end collisions or side collisions and other traffic accidents, affecting safety.
In this part of the test, Jeep Commander still has excellent performance, from 60km/h to 100km/h it takes only 4.03 seconds, the speed explosion is very fast, which also means that Jeep Commander still has abundant power support in the middle and high-speed area and can complete the parallel overtaking action particularly smoothly at high speed. The outstanding performance in the actual measurement process also made Teacher Wu highly affirm the motivation of the Jeep Commander.
Why did Grand Commander Jeep achieve such good measured acceleration results? It is inseparable from the 2.0T direct-injection turbocharged engine and the ZF imported 9-speed manual transmission, and the two are like close friends for many years.
1. Reduce latency
This 2.0T engine uses an integrated water-cooled intercooler to cool the turbine intake, compared to the traditional external air-cooled intercooler, the structure of the water-cooled intercooler is more compact, the pipeline is short, and the pressure in the tube is better maintained, which can greatly reduce the turbine delay phenomenon, so that the power output is more rapid when accelerating, and the water-cooled intercooler is also generally used in some high-end models.
2. Strong outbreak
The single-turbo twin-scroll tubular system divides the engine exhaust ducts into two groups (1 and 3, 2 and 4) of cylinder exhaust pipes adjacent to each at the time of ignition to drive the turbine work, with stronger pulse boosting and more adequate exhaust. It is easy to understand that, just as there is usually a fence separating the high-speed passages to avoid vehicles occupying each other, the double vortex technology avoids interference with the air flow between the cylinders.
Compared to ordinary single-turbo scrolls, twin-scroll technology allows engine peak torque to explode earlier, start faster, and have better fuel economy.
3. Deep friction reduction
The internal components of the engine are mechanical hard connections, so there is bound to be a part of the work loss when operating, and the low-friction camshaft bearings used in this 2.0T engine can effectively reduce the friction of the bearings, thereby reducing heat generation, reducing engine heat loss, and using more energy on driving the car to improve power.
4. Efficient combustion
Compared with the common multi-point EFI, this 2.0T engine uses the cylinder mid-direct injection technology, not only the fuel atomization effect is better, but also the nozzle position is centered, from top to bottom, so that the oil and gas can be fully and uniformly mixed in the entire cylinder, so that every drop of oil can exert energy efficiency, high energy conversion, improve power and reduce fuel consumption.
Teacher Wu, who is in charge of the test, also highlighted the smoothness of the Jeep commander, the whole acceleration test process, ZF 9 speed manual transmission has a very subtle sense of existence, but the overall power connection is particularly smooth, the driving body feeling is very comfortable, the gearbox properly combs the power output, there is no sense of separation, and it is also an important reason to help the Jeep commander get excellent results in the dynamic test.
Strong power output will eventually be pressurized to the tire, so a pair of excellent performance of the "running shoes" can not be less, Bridgestone green song companion series although not obviously the main sports performance of the tire, but its special rubber formula and pattern design, can achieve low rolling resistance and better grip performance, can significantly reduce the vehicle skidding and cause unnecessary power loss, to help accelerate the process more smoothly, faster.
Summary: In the impression of most people, an SUV that is not small for home seems to have much to do with acceleration and performance, but you can not use power, but you can't do without. Excellent power performance when driving alone can please yourself; and full loads of family and friends, sufficient power support can also meet your confidence in the face of various road conditions, Jeep Grand Commander is such a home high-quality SUV that can provide excellent power experience, the excellent results achieved in the "Tsinghua Test" power test are the best proof, the perfect match between the 2.0T direct injection turbo engine and the ZF 9-speed manual transmission, bringing an excellent power experience, It has also been highly recognized by tsinghua teachers who are responsible for testing.