Abstract: The invention relates to a fuel injection device with an oil seal in which a fuel tank is not soiled by a lubricating oil and a lubricating oil consumption amount is a little. Accordingly, the fuel injection device is provided with a fuel returning annular groove (20) provided between an upper surface of the housing (13) and the pressure chamber (15) and on an inner periphery of the plunger hole (14) and further communicated with the fuel tank, and an oil seal (40) provided between the housing (13) and the plunger (11), thereby preventing a lubricating oil on the upper surface of the housing after lubricating the cam from entering into the fuel returning annular groove.

Abstract: According to the present invention, a power transmission apparatus for an internal combustion engine (2) having a supercharger (1) attached thereto is constructed such that thermal energy included in exhaust gas discharged from a turbine (T) in the supercharger is recovered by a waste heat recovering turbine (3) thereby to drive the waste heat recovering turbine (3), auxiliary units (9), (10) for a cooling system of the internal combustion engine (2) are driven by power generated by the waste heat recovering turbine (3) which has been driven and the power generated by the wasted heat recovering turbine (3) is then transmitted to a crankshaft (12) of the internal combustion engine (2) via a coupling (6) for interrupting power transmission in an operational region where the internal combustion engine is rotated at a low speed or in an operational region where the internal combustion engine is rotated under a low load.