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4JA_1、4JB_1发动机是我国从日本引进的柴油发动机,装在江铃、庆铃等汽车上,以故障率低、油耗少和转速高等优点,深受广大用户好评。但也因诸多因素,如燃油品质差、维护不及时、对油路构造原理不了解和使用不当等原因,造成故障。因该发动机燃油供给系较复杂,如装有水分离器、断油电磁阀、冷起动装置和VE型喷油泵等,使许多驾驶员及维修人员对故障束手无策,排除困难。在此笔者就常见的几种故障、原因及排除方法作一简单介绍。
4JA_1, 4JB_1 The engine is a diesel engine introduced from Japan. It is installed on JMC, Qingling and other vehicles. It is well received by users due to its low failure rate, low fuel consumption and high speed. But also due to many factors, such as poor fuel quality, maintenance is not timely, do not understand the structure of the oil circuit and improper use of other reasons, resulting in failure. Due to the complex fuel supply system of the engine, such as the installation of water separator, fuel cut solenoid valve, cold start device and VE injection pump, many drivers and maintenance personnel are at a loss to help with the troubleshooting. In this author several common faults, causes and troubleshooting for a brief introduction.