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But once run in the process of gaining full power with minimal rpm overshoot or droop or heavy black smoke was achieved by finely adjusting the injection timing and governor load springs in the CAV DPA injection pump. Ian V Curtis recollections whilst an apprentice Diesel Engineer at Walkers Marine during the 1980s.
The valve resembles a typical spring-loaded check valve, with a small addition for the anti-dribble function. These valves are mounted on the outlet fittings of the fuel injection pump, one per cylinder injector. They are always mounted at the pump end of the pipes between the pump and injectors.
Injection pump for a 12-cylinder diesel engine. An injection pump is the device that pumps fuel into the cylinders of a diesel engine.Traditionally, the injection pump was driven indirectly from the crankshaft by gears, chains or a toothed belt (often the timing belt) that also drives the camshaft.
Common rail fuel system on a Volvo truck engine. In 1916 Vickers pioneered the use of mechanical common rail systems in G-class submarine engines. For every 90° of rotation, four plunger pumps allowed a constant injection pressure of 3,000 pounds per square inch (210 bar; 21 MPa), with fuel delivery to individual cylinders being shut off by valves in the injector lines. [1]
In 1926 CAV was bought by Lucas. [12] In 1931, CAV in partnership with Robert Bosch, became CAV-Bosch Ltd and began making fuel injection pumps for the diesel industry and later fuel systems for aircraft. [12] Lucas bought Bosch's interest out in 1937 and it became CAV Ltd in 1939. In 1978 the company's name became Lucas CAV. [12]
The diesel injection pump is a rotary distributor type most typically made by Lucas CAV. For Ford Fiesta and some Ford Escort (Europe) (typically commercial and base model applications) the Endura-DE engine was a normally aspirated engine producing 60 PS (44 kW; 59 hp).
The fuel pump used in these engines was the Bosch P7100 injection pump, this pump is driven off the camshaft gear and drives its own internal camshaft to inject fuel to the individual injectors. [13] This pump itself was one of the most popular options for fueling for the B-Series Engines because of this simplistic design and how reliable it was.
Toward the end of the pump stroke, the spill valve is re-opened, allowing the fuel to recirculate again and ending the injection phase. Thus, although the mechanical plunger pump has a fixed stroke, electronic control can select any part of that stroke to deliver to the cylinder, thereby controlling the volume and timing of fuel delivery.
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