求翻译：四、蓄压器喷射系统 　　共轨系统：在共轨式蓄压器喷射系统中，压力的产生与燃油喷射过程脱开；喷油压力与发动机转速和喷油量无关，喷油压力“积蓄”在“共轨”（蓄压器）中，时刻准备着喷油；喷油时刻点和喷油量在电子控制单元中算出，再由喷油器通过使电磁阀通电来实施在每一个气缸中的喷油是什么意思？

4, the accumulator injection system common rail system: Common Rail accumulator injection system, pressure generation and the fuel injection process to disengage; independent of injection pressure and engine speed and fuel injection quantity, injection pressure "saved." always ready with fuel inject