Diesel Injector Fuel Injector 095000-5223 095000-5226 Denso Injector for Hino

Since a certain platform was put into production, 5 diesel generators have been maintained and overhauled in strict accordance with the requirements, and have been running smoothly. However, since 2013, the failure rate of diesel injectors has increased sharply (as shown in Figure 1), seriously affecting the normal operation of the platform.
Due to the failure of the diesel engine, the equipment has to be switched frequently. According to the program requirements: each switch should keep the diesel engine running with diesel oil for two hours, and then switch to crude oil operation after stabilization. According to rough statistics: each diesel generator consumes about 170 gallons of diesel per hour, and 160 times of diesel engine switching will consume 54,400 gallons of diesel, which is equivalent to RMB 1.2 million based on the diesel price of the year (about 7,000 yuan/ton). One fuel injector broke down in two days, causing the maintenance personnel to deal with it day and night, which brought a lot of pressure to the maintenance personnel. According to the collected information and analysis of the fuel injector failure data of diesel engines (see Figure 4 for details), it is preliminarily concluded that the cause of the fuel injector failure is: due to the change in the viscosity of the crude oil produced, the diesel engine for the use of light crude oil cannot meet the new operating conditions. In the working condition, the fuel injector jams and causes the fuel injector to fail. Validate this repairer and try to improve.
solution
For the problem that the gap between the plunger and the plunger is too small: it is planned to adjust the gap between the plunger and the plunger sleeve to make it better lubricated. This method can theoretically solve the problem of the sticking of the injector plunger. In order to verify the above conclusions Correctness, in 2016, the United Nations domestic diesel engine manufacturers produced 4 fuel injectors: the gaps between the plunger couples were 6um, 8um, 10um, and 12um. The fuel injector with a plug gap of 10um runs for 4900 hours without abnormality, far exceeding the average life of the original fuel injector.
After more than two years of exploration, testing and improvement, the failure rate of the improved injector in the machine test is less than 9%, and the problem of jamming of the injector plunger has been completely solved. The improved injector can meet the requirements Poor working environment of the platform. At the same time, the labor intensity of on-site maintenance personnel is greatly reduced, and the reliability of on-site equipment is improved.