一种具有流量控制功能的高压共轨喷油器
By adopting a split control plunger and needle valve structure and connecting hole design in the high-pressure common rail injector, the problem of abnormal increase in fuel injection volume caused by blockage or sealing failure of the return oil flow orifice is solved, realizing flow restriction control of fuel injection volume, avoiding engine damage, and improving system safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA NORTH ENGINE RES INST
- Filing Date
- 2023-09-12
- Publication Date
- 2026-07-17
AI Technical Summary
When the return oil metering orifice of the existing high-pressure common rail injector is blocked or the return oil sealing cone fails, it causes abnormal opening of the needle valve, a sharp increase in the injection volume, an increase in engine exhaust temperature, and even engine cylinder scoring damage.
The control plunger and needle valve are designed with a split structure, with a connecting sleeve and a connecting hole between them. By controlling the fuel flow, the amount of fuel injected is limited, ensuring that the amount of fuel injected by the injector is always within a certain range under different control pulse widths and valve failure conditions, thus having the ability to limit flow.
This effectively avoids engine cylinder scoring damage, ensures that the fuel injection volume is within the normal range, and improves the safety and reliability of the system.
Smart Images
Figure CN117249025B_ABST