BOSCH柴油共轨系统油压异常波动典型故障解析

Typical Faults Analysis of Abnormal Oil Pressure Fluctuation of BOSCH Diesel Common Rail System

现代电控柴油发动机多数采用了BOSCH高压共轨系统,文章结合车辆行驶过程中因共轨系统油压异常波动,导致发动机转速限制这一典型故障,通过对BOSCH柴油共轨系统闭环控制的基本工作原理和失效策略分析,将故障产生的原因、诊断流程和诊断方法等进行详细归纳总结。

Most modern electronically controlled diesel engines adopt the BOSCH high-pressure common rail system.Based on multi-layer wavelet transform and compressed sensing theory,a compressed sensing algorithm with mixed measurement mode is proposed.This algorithm can overcome the limitation of the existing compressed sensing algorithm based on single-layer wavelet decomposition on the number of measured points,and make the algorithm more practical.The basic idea is to retain the low-frequency coefficients and only measure the high-frequency wavelet coefficients of each layer,that is,the mixed measurement mode is adopted for the wavelet coefficients.Compared with the classical compressed sensing algorithm,in the case of using fewer measurements,the algorithm in this paper can better improve the quality of the reconstructed signal.