| 摘要 |
The pump ( 7 ) is provided with a body ( 16 ) having a compartment ( 17 ), and with at least one pumping element ( 13 ) that moves in a cylinder ( 12 ) in communication with the compartment ( 17 ), to raise the pressure of the fuel. The pump ( 7 ) comprises fluid-supply means ( 14, 22 ) for delivering the fuel to the pumping element ( 13 ), and an inlet mouth ( 26 ) made in the body ( 16 ) and supplied with the fuel coming directly from an external source ( 2 ). The inlet mouth ( 26 ) is fluidically connected to the compartment ( 17 ) to supply it with the fuel in order to lubricate and/or cool the pump ( 7 ) itself. Set between the inlet mouth ( 26 ) and the compartment ( 17 ) are: a non-return valve ( 33 ) to prevent in any case the pumping elements ( 13 ) from sucking the fuel from the compartment ( 17 ) of the body ( 16 ); and a flow regulator ( 29' ), which allows an amount of fuel to pass such as to enable proper lubrication and cooling of the compartment ( 17 ) and of the parts present in the compartment ( 17 ). The fluid-supply means ( 14, 22 ) comprise at least one further inlet mouth ( 24 ) made in the body ( 16 ) and fluidically connected with the pumping element ( 13 ) by means of pipes ( 9 ).
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