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Keeping the pressure up EUP has catered for older cam-in-block
Page 49
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engine designs, with a cam-driven pump mounted on the engine block, which is connected to the injector, and then fitted in the cylinder head. via a high-pressure pipe.
Customers
The system uses the same basic pump components as the E3 EUI combined pump and injector, which is designed for cam-in-head engines.
Volvo, for example, has
10Delphi will adapt its E3 unit injector for one variant of its distributed pump common rail system designed to meet Euro-6 injection needs been a customer for Delphi's EUI systems since the D12 engine of the 1993 FH.
For the distributed pump common-rail systems, Delphi has adapted the EUP and EUI
pumps to deliver fuel to a common rail at very high pressures 2,400, 2500. 2,700 or 3,000bar, as required. For both system variants, up to six pumps can be used when fitted to a six-cylinder engin e.
Delphi is planning to produce two variants of each system. One will be designed for engines with capacities of four to nine-litres, an a larger system, which has been designed for engines between nine and 16-litres.