Fuel supply system for dimethyl ether engine

Abstract

Damaging of a high-pressure fuel pump is prevented by driving the high-pressure fuel pump when interior lubrication of the high-pressure fuel pump is ensured. The fuel supply system (1) for a dimethyl ether engine, wherein dimethyl ether is supplied from a fuel tank (3) to a high-pressure fuel pump (5) while being raised to a saturated vapor pressure or above by means of a pressure feed pump (12) and is then raised to a pressure suitable for injecting into an engine by means of the high-pressure fuel pump (5) and supplied to a common rail (8) to which fuel injection devices (7) are connected, comprises: a dimethyl ether detecting device (16), disposed in a fuel pipe leading to said high-pressure fuel pump (5), for detecting the state of the dimethyl ether from the pressure feed pump (12); and an electronic control unit (17), connected to said dimethyl ether detecting device (16), for driving said high-pressure fuel pump (5) when the dimethyl ether inside the fuel pipe (6) leading to said high-pressure fuel pump (5) is in a liquid state.

Dependencies are inferred from the claim text.