1. The engine valve drive mechanism adopts a hydraulic supported ball rocker arm structure. Compared with the hydraulic tappet type valve drive mechanism commonly used in gasoline engines nowadays, this novel valve drive mechanism has the advantage of relatively small friction torque, so the required driving force is also small, which can effectively reduce engine power consumption and fuel consumption.
2. To effectively reduce the weight of the entire vehicle, the 1.4-liter gasoline engine adopts an aluminum alloy cylinder body, achieving a very obvious lightweight effect.
3. Using specialized materials and specially processed plastic intake pipes instead of traditional metal intake pipes not only achieves lightweight effects, but also effectively reduces intake pipe wall resistance, improves intake efficiency, and increases engine power.
4. The expansion type connecting rod processed with advanced technology uses specialized expansion equipment to expand and break the large end hole of the processed connecting rod, instead of the original sawing and grinding process. This can utilize the serrated "Huff" surface of the connecting rod to ensure absolutely accurate fastening positioning, thereby reducing friction and extending the service life of the connecting rod.
5. By using a hot sleeve camshaft, compared to the original camshaft, it not only reduces the weight of the camshaft, but also achieves higher cam profile accuracy and more precise valve timing.
6. The throttle adopts an electronic control device, also known as E-GAS electronic throttle. This control device can coordinate and reasonably manage the instantaneous requirements of the engine torque and output power for various working conditions of the car, such as the driver accelerating, overtaking, starting the air conditioning, etc., which can ensure that the engine operates in the optimal range at each working point, meet the requirements of low emissions and low fuel consumption, and optimize the overall driving performance of the vehicle.
7. Improving the layout of the engine intake system can effectively reduce the intake temperature and increase the intake density of the engine, allowing the engine to output greater power on the basis of improved inflation efficiency. The specific improvement is to arrange the intake pipe of the engine on the left side of the front module of the engine, above the cooling water tank.
8. To improve the anti-corrosion ability of the cooling water tank and extend its service life, the cooling water tank fins arranged in the front end module of the engine are all covered with plastic.
9. To prevent collision and friction between the bottom of the engine oil pan and uneven road surfaces, which may damage the engine, a metal protective plate can be optionally installed underneath the oil pan.
10. In order to effectively insulate, sound, and shock, and prevent them from entering the passenger compartment and affecting ride comfort, the POLO sedan has installed an insulation shield at the exhaust pipe.