The launch of the Heroic engine means that the Jaguar Land Rover brand can finally abandon its previous power sources from Ford and BMW. Based on the single-cylinder "500mL" concept and modular design, the Yingjili engine has multiple different displacement versions. The current domestically produced one is the 2.0T four-cylinder gasoline version.
The valve timing system is equipped on both the intake and exhaust sides of the Ingenium engine. The solenoid valve at one end of the camshaft is used to adjust the phase of the sprocket to adjust the intake and exhaust timing. The implementation method is basically the same as the timing system principle of other brands of engines. By adjusting the phase of the valve, the intake demand of the engine under different working conditions is met, and the power response at low speed and the combustion efficiency at high speed are improved.
Comparison of power parameters of new and old engines | ||
Applicable models | Discovery Sport | Discovery Sport |
Engine Type | 2.0T gasoline engine | 2.0T gasoline engine+48V mild hybrid system |
Maximum Power（Ps/kW) | Low power: 200/147 High power: 241/177 | Low power: 200/147 |
Maximum power speed（rpm） | 5500 | - |
Peak Torque(N·m/rpm) | Low power: 320 | Low power: 320 |
Peak torque speed（rpm） | Low power: 1200-4000 | Low power: 1200-4000 |
Comprehensive fuel consumption of the Ministry of Industry and Information Technology, L/100km | 7.6-7.7 | 7.6 |
Although a lot of new technologies have been added, in terms of parameters, there is not much difference between the power parameters of the Discovery Sports engine and the Discovery Shenxing. The parameters of the low-power version are basically the same, and the maximum power and peak torque of the high-power version are slightly smaller. Added 8Ps and 25N·m. As for the specific performance of the new car? We also tested it not long ago. For details, please click "New Experience Testing Land Rover Discovery Sport 249PS" for details.
At present, the engine design of Yingjie Li still follows the concept of single cylinder "500mL", with a displacement of 0.5L per cylinder, the same as BMW. The main parts of the engine, including the cylinder head, cylinder block, and oil pan, are all made of all aluminum material, the same as before. But the difference is that in order to achieve better noise reduction and insulation functions, a larger area of soft sound insulation material has been added to the surface of the cylinder body to enhance the NVH effect.
The piston connecting rod is manufactured using the split-breaking process, that is, the connecting rod body and the tile cover are originally a whole, and after the processing is completed, the two parts are forcibly separated by machinery. The advantage of this process is that the cross-sections of the connecting rod and the tile cover are in one-to-one correspondence. After recombination, the fit is very tight and the resistance to transverse shear force is strong. In addition, the piston rod part has been strengthened to cope with the higher load of the engine.
The air intake system is also different compared to the Discovery Sport. The Discovery Sport integrates the air intake on the engine cover. Although the position is higher, according to official data, its wading depth is still the same as that of the Discovery Sport at 600mm.
The cylinder head is mainly made of aluminum alloy. The technology worth mentioning is the integrated exhaust manifold design. The advantage of the integrated design is that the engine can use the high temperature of the exhaust to achieve better heat exchange. It has high warm-up speed and warm air in winter. With features such as more timely delivery and optimized exhaust, this technology is now adopted by many OEMs.
The exhaust manifold is integrated into the cylinder head. Its advantage is that it is compact in structure and the water temperature rises quickly after cold start. Nowadays, many engines adopt the same design concept. The exhaust manifold on the cylinder head has two outlets, which are used to match a twin-scroll single turbocharger. The two exhaust scrolls are independent of each other and the exhaust pulses do not interfere with each other, thereby achieving better exhaust efficiency. , and improve air intake.
The 48V starter-generator in the P0 position can play a certain role in improving NVH performance and fuel economy.
The 48V mild hybrid system is one of the biggest changes in the new engine. The starter-generator is installed in the original starter position and provides additional power through the belt. Compared with the traditional automatic start-stop, the 48V system can provide additional torque assistance in high fuel consumption conditions such as static start, and also has the advantages of fast starting speed and good starting smoothness. The upgrade cost of the whole system is much cheaper than many hybrid systems (such as Toyota THS, Honda i-MMD, etc.).
Although the 48V system has limited fuel-saving capabilities compared to traditional hybrid systems, it still has certain energy-saving potential compared to pure fuel engines, especially under some extremely low load conditions, the engine can be shut down for a short time, thereby reducing fuel consumption.
The continuously variable valve lift system is a highlight of the new model. The system is set on the intake side and uses a solenoid valve to control the hydraulic pump to adjust the length of the valve tappet, thereby achieving the purpose of adjusting the valve lift. The valve lift on the intake side is steplessly adjustable, with a lift range of 0-11 mm.
In terms of the fuel injection system, the Ingenium engine uses a high-pressure common rail fuel injection system. The current injection pressure of the AJ20 engine is 200 bar, and the future AJ21 engine will further increase the injection pressure. The side of the piston is coated with a dark anti-wear coating, and the labyrinth oil-gas separator is located on the top of the cylinder head. These are the friction reduction and separation forms that many mainstream models will use.
Considering that the National VI emission standard also sets restrictions on particulate emissions, in order to meet the standard, the Discovery Sport version has made changes in exhaust gas treatment, adding a particulate matter collection device at the rear of the three-way catalytic converter. However, as the mileage increases, the particulate matter in the collection device is clogged, so the Discovery Sport version also has a pressure sensor on the device. Once the risk of clogging is detected, the system will automatically increase the engine speed to burn these blockages.
The power system of the Discovery Sport integrates many new technologies, such as the 48V mild hybrid system, the valve lift technology regulated by electromagnetic oil pressure, the sound insulation and vibration isolation foam material on the cylinder body, and the particle collection device on the exhaust gas treatment system. These are all technical highlights worth mentioning on the new machine, and are at the leading level in terms of technological content. Among them, the valve lift technology controlled by electromagnetic oil pressure is a major feature. At present, this technology is still very rare in domestic engines. The stepless adjustment of the intake valve lift and the timing system can more accurately meet the detailed needs of the engine for power, torque, etc. under different working conditions.
The 48V mild hybrid system is also a technical highlight of the Discovery Sport. This technology can be seen in many other brands, especially mid-to-high-end models. Although the 48V system cannot have the ability to independently drive the vehicle for a long time like Toyota or Honda's hybrid system, and the fuel saving effect is not so obvious, compared with traditional fuel engines, the addition of a mild hybrid system can improve the starting speed and smoothness, and the NVH performance is also better, which is an effective supplement to traditional engines. For the Discovery Sport, its changes compared to the Discovery Sport are not limited to this. Its chassis structure is also worth a look.
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