Oil injector for parameter test in cylinder of diesel engine and machining method thereof

Abstract

The invention discloses an oil injector for parameter test in a cylinder of a diesel engine and a machining method thereof. A lead channel can be provided for a cylinder parameter test sensor under the condition that oil is injected into an engine cylinder normally, and the lead channel is formed by combining three sections of through holes in a needle valve body, a transition block and an oil injector body. A modified part comprises the oil injector body, the transition block and the needle valve body, and channels for a sensor or a lead to pass through are arranged on the corresponding positions of the oil injector body, the transition block and the needle valve body in a machined mode, so that a sensor lead can be introduced out of an oil injector assembly from the head of the needle valve body, a through hole of the needle valve body, a through hole of the transition block, and a through hole of the oil injector body. By the adoption of the structure, the lead channel can be provided for the tests such as the temperature of the ball head part of the injector needle valve body when the engine works, the gas temperature in the air cylinder, and the gas pressure in the air cylinder. The internal lead of the oil injector is adopted, so that any change to other parts of the engine is made, and one oil injector for test can be used for multiple times.

Description

technical field [0001] The invention belongs to the field of diesel engine testing, and relates to a fuel injector for testing parameters in a diesel engine cylinder and a processing method thereof. Background technique [0002] With the progress and development of the automobile industry, more and more attention has been paid to the energy-saving and environmental protection performance of automobiles. Internal combustion engines are increasingly intensified, and engineers often need to measure engine in-cylinder parameters. The test of the parameters in the engine cylinder needs to lead the data line out of the cylinder, which often involves the modification of the parts of the engine body or cylinder head. The production cost of single-piece modification is high, and the production cycle is long, which will easily lead to the failure of the processed parts and the quality of the workmanship. unstable. [0003] The cylinder pressure test needs to drill a hole on the cyli...

AI Technical Summary

Problems solved by technology

Without the support of test data, it is difficult to determine the temperature value of the ball head of the needle valve body by using the simulation calculation method

Without specific stress and strain tests, it is difficult to obtain the mechanical load of the needle valve body when it works in the cylinder, and it is difficult to predict the fatigue life of the needle valve body

Images