2015 Buick Enkola 1.4T Hands-on Experience Evaluation

A few years ago, I didn't know what a small SUV was. Now the models can't be counted with both hands. It's so popular. As one of the earliest small SUV models, oncola has won a lot of praise up to now. However, the current models push through the old and bring forth the new so quickly that it is necessary to keep pace with the times in order to maintain the freshness and competitiveness of the products, so the 2015 oncola came. In addition to adding some configurations to the modified model, the most important thing is to replace the new "6dss intelligent start stop gearbox". So how will this change improve the driving quality?

In 2015, there are 5 models in Ankara, with a price of RMB 139800-186900. The test model is Ankara 1.4T GL at two-wheel drive urban leading model (secondary top configuration), and the official price is RMB 168900. Before the article begins, let's take you through the following three points to quickly understand the new encora.

● appearance change: new electro-optic blue car paint

The appearance design of the 2015 ankola is the same as that of the old one, except for the addition of electro-optic blue car paint. Therefore, in addition to the blue body, it is basically difficult to distinguish between new and old models.

● interior changes: two seat color matching models are added

The central control layout is consistent with the old model. The main change of the new model is to add two seat colors of "Aegean Sea Blue" and "desert yellow" to the medium and high configuration. In addition, engine start and stop technology and Sport mode are standard.

Blue Alcantara high-grade suede material is added to the medium and high configuration models (yellow is exclusive to the top configuration model), which adopts two-color matching. The cushion and backrest area adopt blue Alcantara high-grade suede material, and the two sides are black leather. The style is fashionable and the riding texture is quite good.

The whole series is equipped with engine start and stop technology as standard, which is one of the highlights of the new models, effectively improving the fuel economy of congested roads and keeping up with the mainstream. In addition, the automatic transmission model also makes up for the lack of sport mode (common s gear) before, which can meet some people who have requirements for driving.

Finally, it is worth mentioning that the new Ankara is also equipped with engine remote start / stop function. The specific operation is also very simple. When the car is locked, long press the start key of the remote control key. The frequency of daily use of this function is not too high, but it is practical in hot summer or cold winter.

● new gearbox: improved ride

A better new gearbox is the highlight of this modification. In practical experience, it is found that the performance of this new gearbox is indeed better than that of the old model, which is mainly reflected in the flexibility of shifting between low gears and better understanding of the driver's downshift intention. During daily driving, the gearbox has a positive upshift, the power connection is smooth enough, and the overall performance is satisfactory.

● driving: ride comfort is improved, chassis vibration is in place

At present, there is only one power option for the whole series of enkola, that is, the familiar 1.4T turbocharged engine. The power parameters remain unchanged. The maximum power is 103kW (140ps) / 4900-6000rpm and the peak torque is 200n.m/1700-4800rpm. The biggest change is the gearbox. Officials said that the new 6-speed DSS intelligent start stop gearbox was replaced this time, such as the new oil pump and clutch plate made of new materials. The specific performance is still very expected. In addition, it should be mentioned that the new models have added engine start and stop technology, which is standard for the whole series.

The full power at lower speed and a wider torque platform are the characteristics of small displacement turbocharged engines, which pay more attention to daily driving. The 1.4T engine on enkola also has such characteristics. The daily driving power is quite abundant, and the acceleration in the middle and low sections is light enough. The maximum torque of the engine can be released at 1700 rpm. In fact, during normal acceleration (not big foot throttle), there is no obvious sudden feeling of turbine intervention. The whole acceleration process is very smooth, but the power reserve of the later acceleration is not so sufficient.

It is worth mentioning that the new model adds sport mode (similar to the s gear of other models, but it adopts button design). Of course, this function is not a decoration. The engine speed and shift logic have changed significantly. The driving change is that the engine speed is basically maintained above 2000 rpm, and the response of the throttle is more sensitive, At the same time, the action of lowering the gearbox is more straightforward, and the car feels more powerful when driving.

The performance of this new gearbox is indeed better than that of the old model, which is mainly reflected in the flexibility of shifting between low gears and better understanding of the driver's downshift intention. During daily driving, the gear of the transmission is upgraded actively, and the power connection is smooth enough, especially the smoothness of low-speed driving is improved. When the acceleration needs to be reduced, the gearbox quickly understands your intention and responds, but the power output is still slightly slow, but the overall performance is satisfactory compared with 6at.

All new models are equipped with automatic engine start and stop technology. This function is very common now, but whether it is easy to use is another matter. Generally speaking, the start stop system on enkola is quite natural to use, at least it won't make you have the impulse to close, which is specifically reflected in jitter control and start logic. The engine start jitter is not obvious and gentle, mainly because its control logic is not too neurotic. For example, it will not start frequently when following at low speed.

Ankola's chassis has a high tolerance and retains a certain road feel during daily driving, that is, when walking on some gravel roads, you can still feel the vibration of the road, but this vibration is like a cushion and not so stiff. When driving at high speed, the chassis feels very stable and gives people good confidence.

The model tested this time is not equipped with 4WD system (only the top model is equipped with 4WD system). Although it is not off-road, with a high chassis, the muddy road in the suburbs can be easily faced, and there is no need to worry too much about the bottom.

When driving on such a large undulating Road, the ankola chassis performs very calmly. The front section is hard and the rear section is soft. The school bus will not feel particularly jumping, and the comfort is good. Coupled with the lightweight steering wheel that filters out most of the vibration feedback, it is quite easy to drive, and it is a little more comfortable to walk on the mountain path.

● test: performance meets expectations

0-100km / h acceleration test

When it is switched to sport mode, the test vehicle is not equipped with 4WD system. When ESP is turned off, if the speed is pulled too high, the front wheels will still slip. Finally, pull the speed to about 2500 rpm and start at full throttle. The front wheels slip slightly. The start is fairly stable, and the rise phenomenon is not exaggerated.

After the starting wheel skidded briefly, the grip was restored. The acceleration g value at the initial stage reached about 0.5g, but soon fell back to 0.4g. The later stage was relatively flat. Finally, the 100 km acceleration result was 10.67 seconds, which was not particularly outstanding among models of the same level.

100-0km / h braking test

In the process of full braking, the braking system works very actively and the braking force is stable, but the nodding phenomenon is obvious, and the support of the front suspension is slightly insufficient. Finally, the braking distance of 100 km is measured to be 42.21 m, and the braking performance is normal.

Noise test

The sealing performance of the enkola model is quite good, the quietness performance is good at idle speed, and the control of driving noise at medium and low speed is also quite good. Only after 100km / h, the noise is slightly higher, mainly from wind noise.

Fuel consumption test

In this fuel consumption test, we (3 adults on the car) ran a long distance. It was a three-day holiday. The highway was not unimpeded. We still encountered congestion and slow driving sections (about half) on the way, and some urban and rural roads. Finally, a total of 485 km was driven, with a total fuel consumption of 40.07l (No. 92 gasoline). The fuel consumption per 100 km displayed by the driving computer is 7L, while the measured fuel consumption per 100 km is a little higher, which is 8.26l. Considering the actual road conditions and load, its overall performance is still satisfactory.

Enkola 1.4T GL at two drive urban leading type

Overall evaluation: one of the biggest changes in this modification is the updated 6-speed automatic transmission. Although the performance is not perfect, it is improved compared with the previous ride comfort and shift logic, and the driving quality is improved. In terms of configuration, the whole series is equipped with engine start and stop technology, new sports mode, engine remote start, etc. as a small modified model, it shows enough sincerity.

advantage

1. The ride comfort of the new transmission has been improved

2. The whole system is equipped with automatic engine start and stop as standard

3. The new exterior and interior colors keep freshness

shortcoming

1. The operation of multimedia system is not convenient enough (there are too many buttons, not as convenient as xinyinglang)

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How to Integrate 5g into V2x Use Cases?
Unmanned driving (i.e. automatic driving) is the next ten-year plan of mankind. To realize this dream, a unique combination of technologies is needed to overcome the primary challenge of autonomous driving.Perfect combinationSelf driving vehicles (AV) need to process large amounts of information in real time. For example, in order to avoid collisions, detect obstacles and pedestrians, and notify free parking spaces, vehicles need to exchange a lot of metadata with urban infrastructure (such as traffic lights, public safety systems), fog / cloud service providers and even automobile manufacturers. According to Intel statistics, the amount of data that needs to be processed by such a car every day will be as high as 3.9tb, which is equivalent to the daily data usage of 2666 Internet users. Automotive components such as ultrasound, radar, global positioning system, camera and infotainment system are all factors leading to the surge of this data.In order to ensure the safe and scalable data exchange of vehicle to vehicle (V2V), vehicle to infrastructure (V2I), vehicle to network (v2n), vehicle to pedestrian (V2P) and other technologies collectively referred to as the Internet of vehicles (v2x), organizations dominated by the society of electrical and electronics engineers and the U.S. Department of transportation have formulated new standards.However, the v2x standard alone is not enough. In order for vehicles to make complex and autonomous decisions in real time without damaging road safety, v2x system must be equipped with a mobile communication ecosystem, whose speed and data processing capacity can match human response. This requirement is further emphasized by the accidents involving automatic driving road test reported in recent years. Therefore, the Third Generation Partnership Program (3GPP) has developed 5g wireless standard.How to integrate 5g into v2x use casesThe common feature of AV is that it can continuously perceive the observed environment, so as to select the driving route in real time. In a bandwidth constrained radio environment, they must be able to handle high levels of noise and interference and high dynamic configuration of external entities. To support v2x use cases, only improving data throughput cannot meet the requirements. In addition, the network infrastructure must be able to provide a highly reliable low latency network and ensure data security in different communication ranges.The realization of the following common v2x use cases will eventually lead the automobile into the fully interconnected automation era:Collaborative awareness (e.g., emergency vehicle warning);Collaborative perception (exchanging original perception data);Coordinated control (coordinate vehicle routes in lane change, queuing, intersection control, etc.);Inform vulnerable road users, i.e. pedestrians, cyclists, etc;Transportation efficiency (dynamically updating routes, maps, etc.)In order to support these use cases, more than one wireless technology may be required, for example, through short-range direct communication between devices (V2V, V2I and V2P), rather than scheduling through the network. The inter device interface using 3GPP release 12 / 13 LTE proximity service technology can be used to reliably transmit a large amount of data between adjacent vehicles with ultra-low delay. For vehicle to network (v2n) communication, not only the traditional cellular cloud service, but also the new 5g wireless technology is needed.Connectivity and network performanceLarge scale data and equipment is the biggest challenge in the era of automatic driving. Compared with 4G / LTE, the bandwidth of 5g per unit area is increased by 1000 times, the traffic is increased by 10000 times, and the number of connected devices per unit area is also increased by 100 times. 5g small base station technology using millimeter wave has higher spectral efficiency, which is a great advantage for v2x environment with limited bandwidth.reliability5g promises to achieve an ultra-low delay of less than 1 millisecond, which can meet the reliability expectations of mission critical v2x use cases. Relatively speaking, wireless data is easier to be intercepted and more vulnerable to man in the middle attacks. 5g is expected to improve the security of 5g electronic products by including mutual authentication, local security components, transport layer security, 99.999% network availability and firmware over the air update.Network slicingJust like the virtual machine on the virtualized hardware platform, the 5g network slicing function allows different suppliers to provide different types of automotive services through the same infrastructure. For example, it will allow telecom operators, road operators and car manufacturers to provide different services for vehicles and their passengers on the same 5g infrastructure.5g v2x requirements and design considerationsIn order to connect vehicles and back-end infrastructure, 5g v2x application puts forward new design requirements for communication system. Therefore, 5g v2x specification is formulated in 3GPP release 16.Industry forums such as 3GPP and 5g Automobile Association have determined the use case specific performance requirements of 5g v2x system in terms of delay, reliability and data rate. 3GPP defines the following five categories of requirements for 5g v2x:General purpose: applicable to interconnection and communication related requirements of all v2x scenariosVehicle queuing: vehicles traveling slowly at ultra-small intervalsAdvanced driving: semi-automatic or fully automatic drivingExtended sensor: information exchange between all v2x supported devices and network elementsRemote driving: operated remotely by the driver (e.g. in a dangerous environment)It should be noted that the requirements of 5g v2x system depend on the use case scenario (Figure 1). Compared with cooperative control in emergency, conventional lane change operation requires much less delay and reliability.Figure 1: this figure shows the requirements of v2x for 5g delay and data rate defined in the 3GPP guide. These requirements will be fine tuned according to the input of the automotive OEM (source: use cases, requirements, and design considerations for 5g / v2x on arxiv.org website)Conclusion AV is essentially a mobile data center; They are highly dependent on edge computing power. It takes about 230 days to transmit data of the autopilot car through the advanced Wi-Fi connection. Therefore, disruptive innovations in products and application specific integrated circuit processing technologies for new radio and antenna architectures are crucial to supporting 5g v2x.Original title: 5G helps auto driving cars transform into mobile data centers.The source of the article: [WeChat official account: Trade and electronics design circle] welcome to add attention! Please indicate the source of the article.
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