As a power source, diesel engines have been widely used in the car industry. In response to the national environmental protection policy, the requirements for energy saving and emission reduction of cars are also increasing. In order to meet this requirement, the scientific and technical personnel of diesel generator manufacturers have developed a new generation of diesel engine injection system. Today, Dingbo Power Generation Equipment will introduce the composition and characteristics of the electronically controlled pump injection system in the diesel engine injection system.
The diesel electronically controlled pump nozzle consists of the following three parts:
(1) High pressure system. The high pressure system of the pump nozzle includes the pump body assembly, rocker arm and follower spring.
(2) High pressure solenoid valve. The high-pressure solenoid valve controls the start time and duration of injection. Its main components are solenoid coil, solenoid needle valve, armature, magnetic core and solenoid valve spring.
(3) Nozzle. The nozzle atomizes and distributes precisely metered fuel into the combustion chamber, it controls the injection rate curve, and the nozzle is fixed to the cylinder head with a nut.
So, what are the characteristics of diesel electronically controlled pump nozzles? What are the future research and development points? Dingbo power generation equipment will answer your questions carefully.
Since the high-pressure fuel pipe is eliminated from the nozzle of the diesel electronically controlled pump, the duration of fuel injection is shortened, and the stability of idle speed and small load is improved, so it is easy to generate high-pressure fuel injection pressure, and the maximum pressure can reach 180mpa. The system is flexible in control. Controllable pre-injection can be achieved through two actions of the solenoid valve, which greatly reduces noise and vibration, and improves emissions. In addition, because the electronically controlled pump nozzle and driving device are installed on the cylinder head, diesel power generation is achieved. The unit has a compact structure and a reduced shape, and the low-pressure inlet and return oil passages can be arranged in the cylinder head.
Compared with the common rail system of other new-generation diesel generator systems, the biggest feature of the electronically controlled pump nozzle is that it is easy to achieve high-pressure fuel injection, while the common rail system can achieve high-pressure fuel injection due to its structural characteristics, especially the high-pressure parts that need to be sealed. The high pressure is limited. On the other hand, because the fuel supply of the electronically controlled pump nozzle is expensive, the cam control is still used, which is not as free as the common rail system in terms of controlling the fuel injection pressure and realizing multiple injections.
The above is the composition and characteristics of the diesel electronically controlled pump nozzle, you can have a little understanding. In the future, with the development of technology, the diesel engine needs to continuously increase the injection pressure of the unit, and can precisely control the fuel injection amount and injection timing, which can greatly reduce the fuel consumption rate and exhaust pollution of the diesel engine, and can also improve the overall performance of the unit. performance.
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