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Access to Documents and Materials for Your Cummins Products Cummins produces a wide variety of documents to help customers get the most from their engines, generators and components. Offered pump is precisely-designed using quality assured components and innovative technology at our state of the art manufacturing unit. We are offering wide range of Cummins Engine Fuel Injection Pump,Cummins Fuel Injection Pump,Cummins Fuel Pumps,Cummins Rotary Pumps. Industrial Cummins Engine Fuel Injection PT Pumps. The identifying letters, ‘PT,’ are an abbreviation for 'pressure-time.’ The principle of the PT Fuel System is based on the. It is a Cummins design for Cummins Diesels. This interval is established and controlled by the engine speed, which determines the rate of camshaft rotation and consequently the injector plunger movement.ĬUMMINS PT FUEL SYSTEM SECTION I Operating Principles Cummins PT Fuel System is a completely new application of basic hydraulic principles to the diesel engine fuel system. The time for metering is determined by the interval that the metering orifice in the injector remains open. A gear-driven positive displacement low-pressure fuel pump naturally supplies fuel pressure. It uses injectors that meter and injects the fuel with this metering based on a pressure-time principle.

5-28) is exclusive to Cummins diesel engines PT stands for “Pressure – Time”.