跳至主要内容

The Difference of EGR, Unit Pump And High Pressure Common Rail Of Euro3 Engine

At present, there are three main types of engines that can meet the Euro III emission standards on the market. One is electronically controlled engine, one is electronically controlled unit pump engine, and the other is electronically controlled high-pressure common rail engine. In order for everyone to be able to understand the technical structure and performance of these three engines, the advantages and disadvantages of the three engines are summarized here for reference only.

EGR technical characteristics:

Its fuel injection system is similar in structure to the Euro Ⅱ mechanical injection pump. The fault diagnosis system has complete functions, easy operation, greatly reduced operating costs, and good fuel adaptability. At present, it can be applied to general-purpose diesel in the country, which is suitable for national conditions. EGR engine repair and maintenance are convenient, reduce the waiting time for repairs, and lower repair costs.

Disadvantages: the emission standard is difficult to guarantee after long-term use.

Recommendations: EGR engine technology is very mature in China, but it is not possible to go through household registration procedures in municipalities, large cities, and some provincial capitals that require higher exhaust emission standards. There is no need to worry about small and medium-sized cities, towns and rural areas. Small and medium-sized enterprises and individuals who meet the above-mentioned areas where households are available and have low budgets for car purchases are recommended to buy.


Technical characteristics of electronically controlled unit pump:

The electronically controlled unit pump system is currently widely used in Europe. The electronically controlled unit pump technology plus mechanical injectors can meet the Euro III emission standards; it can be easily upgraded from Euro III to Euro Ⅳ without large-scale modifications to the engine structure.Its fuel injection rule is firstly slow and then urgent, which meets the requirements of ideal heat release rule, which is conducive to reducing emissions and combustion noise; it has strong fuel supply capacity and can be independently controlled for each cylinder, especially suitable for heavy-duty diesel engines with high power; zero system The components are more mature than the common rail system and have a longer service life; low maintenance costs: single-cylinder parts can be replaced, and the cost of mechanical injectors is lower than that of electronically controlled injectors.

Disadvantages: The technology is becoming more mature, but the market penetration rate is not as good as EGR.

Recommendation: Cities with higher engine emission standards and users who are concerned about the need to upgrade subsequent policy adjustments may consider buying.


Features of electronically controlled high-pressure common rail technology:

The electronic control common rail technology has a simple structure and is easy to install. The common rail oil pressure is independent of the engine speed control, and the vehicle control function is strong, adapting to the requirements of light vehicles; its pre-injection technology can reduce idling noise; the common rail system is flexible, but it will inevitably bring the difficulty of matching work; The potential of Euro IV emission regulations;

Disadvantages: For light vehicles, system components are mature and have long-term use assessment verification; medium-sized vehicles are relatively mature; but the service life of heavy-duty diesel engines has not been verified. Doesn’t comply with the law of slowing down before burning required by diesel engine combustion, which is not conducive to emission control; it has disadvantages compared with unit pumps in terms of fuel consumption; poor adaptability to fuel (water and ash impurities) and high requirements for users’ use conditions, especially The control system and control strategy are complex, which poses challenges to vehicle manufacturers, users, and after-sales maintenance; the replacement cost of parts is high, especially for electronically controlled fuel injectors and electronically controlled fuel injection pumps.


Related products:Euro5 lhd garbage dump truck, euro3 heavy duty dump truck.

标签：

评论

发表评论

此博客中的热门博文

The Maintenance of LED Advertising Truck

 The generator is an important part of the LED advertising truck , and it is the power supply system of the whole truck. Except for the fixed-point parking of our advertising vehicles and plugging in an external power cord for playback, our generators are needed for power supply at other times. Therefore, in order to do a good job in advertising, we must pay special attention to the maintenance of our advertising truck generators. So how do we maintain our LED advertising truck generator? First of all, we have to regularly check the generator of our advertising truck, especially the inspection of the generator oil, and change the oil frequently. Take out the oil dipstick 20 minutes after it is not started or shut down, wipe the oil dipstick with a clean rag or paper towel, reinsert it into the oil hole for 10 seconds, and then take it out to ensure that the oil reaches the middle and upper parts of the lower and upper marks on the oil dipstick. Secondly, we need ...
发表评论
阅读全文

Welding Process of Fuel Tank Truck

  CLVEHICLES.COM has a tank body welding process for fuel tanker truck . Many users who use oil tankers must also want to know how the tanker is made. Now I will introduce the welding of the oil baffle. Welding of the oil baffle plate of the refueling truck: the main work is the welding of the oil baffle plate in the cylinder body. According to the above, three oil baffle plates are generally arranged inside the 6M long cylinder body, and the cylinder body is divided into four compartments. Each oil baffle plate The plate must be intermittently welded with the cylinder body. If it is a separate tank, the oil baffle will be replaced by a partition, and continuous welding must be carried out. The length of each girth weld is based on the aforementioned 6-7.5M length. The continuous welding is calculated according to half of the welding length. The total welding length of this station is about 20M, and the welding speed is calculated at 5mm/s. The welding time is about...
发表评论
阅读全文
Sprinkler truck maintenance in low temperature: 1、 When starting, pay attention to moderate heat:it is a good habit to start a moderately hot truck before starting the car. First idle for about 1 minute, then let the car run slowly for a long distance. The long-term in-situ hot car will increase fuel consumption; Operating the air conditioner at idle seed consumes fuel in particular. 2.When driving, pay attention to gentle refueling, and avoid stepping on the throttle. Cooling system, check the water tank, water pump and belt, water pipe, water supply tank and other components regularly in low temperature weather, especially for suction pump. If there is damage or malfunction, it is best to promptly, repair or replace. 3.Avoid low-speed at high-speed driving: sprinklers should avoid low-speed at high-speed driving, in addition to easy to lose grip, the engine speed is too high, it will be a little”only drink oil does not walk”. 4.Chassis: it is best t...
发表评论
阅读全文