Fuel supply device
AssigneeRobert Bosch GmbH
InventorGerhard Stumpp
Life of this patent
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Abstract
A fuel supply device for internal combustion engines wherein the temperature of the fuel fed to an injection pump can be regulated in order to avoid temperature influences on the fuel metering operation. For this purpose, fuel is withdrawn in a controlled quantity via a temperature-controlled valve from the intake chamber of the injection pump, where the fuel is under the feed pressure of a fuel feed pump and the withdrawn fuel is fed, either by way of a heat exhchanger or directly back to the intake side of the fuel feed pump. In this arrangement, the inherent fuel heating process taking place in the fuel injection pump is exploited to regulate the temperature of the fuel fed to the fuel feed pump.
Claims6
In combination with a fuel injected internal combustion engine having a fuel injection pump, a fuel feed pump and a fuel tank, a fuel temperature control system comprising:
- means connecting said fuel feed pump to supply fuel from said tank to the inlet of said fuel injection pump;
- fuel relief conduit means including throttle means connected to said fuel injection pump;
- and
- temperature controlled valve means operable in response to fuel temperature connected between the outlet of said throttle means and at least said tank and operable to conduct fuel from said throttle means to said fuel tank if the fuel temperature is above a predetermined value and to block flow to said tank if the fuel temperature is below said predetermined value.
Dependencies are inferred from the claim text.