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A fuel system for a compression ignition engine includes a high pressure pump to which fuel is supplied through a filter by a low pressure pump. A fuel heater is provided to supply heat to the fuel. Fuel is returned from the housing of the high pressure pump through a conduit which includes in a val

A fuel system for a compression ignition engine includes a high pressure pump to which fuel is supplied through a filter by a low pressure pump. A fuel heater is provided to supply heat to the fuel. Fuel is returned from the housing of the high pressure pump through a conduit which includes in a valve housing a restricted orifice. The valve housing also includes temperature responsive means which when the fuel temperature is low reduces the size of the orifice.

대표청구항 ▼

A fuel supply system for a compression ignition engine comprising a low pressure pump having an inlet connected to a fuel supply tank, a high pressure fuel pump including a housing, a fuel filter connected between an outlet of the low pressure pump and an inlet of the high pressure pump, a fuel heat

A fuel supply system for a compression ignition engine comprising a low pressure pump having an inlet connected to a fuel supply tank, a high pressure fuel pump including a housing, a fuel filter connected between an outlet of the low pressure pump and an inlet of the high pressure pump, a fuel heater for heating fuel flowing to the filter, a fuel return conduit extending from the housing of the high pressure pump to said supply tank, and temperature responsive means in said return conduit responsive to the temperature of fuel flowing in said fuel return conduit, said temperature responsive means acting to restrict the flow of fuel in said fuel return conduit when the temperature of the fuel flowing in said fuel return conduit is below a predetermined value and comprising a valve housing defining a valve chamber, said valve chamber forming part of said conduit, a valve member movable in said chamber, a temperature responsive spring acting on said valve member, the valve member and spring being arranged so that when the fuel flowing in said chamber is cold, the valve member will be moved in said chamber to restrict the fuel flow through the chamber.