1.4 Comparison to Conventional Pump 5 System Inline Type Common Rail System Pipe Instantaneous high pressure Timer Nozzle Governor Pump Rail Constant high pressure Supply pump Injector Injection quantity regulation Pump (governor) ECU, injector (TWV) Injection timing regulation Pump (timer) ECU, injector (TWV) Distribution of generated pressure Pump Supply pump Distribution Pump Rail Injection pressure regulation (Dependent on engine speed and injection volume) Supply pump (PCV) Q000085E