Apparatus and method for pressure regulation of a gaseous fluid

A pressure regulation system for a gaseous fluid comprising:

• a gaseous fluid supply of the gaseous fluid;
• a hydraulic fluid supply of a hydraulic fluid;
• a rail injector in fluid communication with the gaseous fluid supply and the hydraulic fluid supply, the rail injector being hydraulically actuated with the hydraulic fluid;
• a gaseous-fluid rail in fluid communication with the rail injector and in selective fluid communication with the gaseous fluid supply, the gaseous fluid having a gaseous-fluid rail pressure in the gaseous-fluid rail;
• a pressure sensor in fluid communication with the gaseous-fluid rail and responsive to the gaseous-fluid rail pressure to emit signals representative of the gaseous-fluid rail pressure;
• a controller communicatively configured with the pressure sensor and the rail injector and programmed to:
• receive the signals representative of the gaseous-fluid rail pressure to determine a measured gaseous-fluid rail pressure;
• and
• actuate the rail injector to inject the gaseous fluid from the gaseous fluid supply into the gaseous-fluid rail as a function of the measured gaseous-fluid rail pressure.