Method for attaching a fuel injection device to an engine and fuel injection device

A method for attaching a fuel injection device to an engine, the engine including a crankshaft (17) with an interlocking gear (16) of a crankshaft gear (15) and a timing gear train (43), including meshed gears (15, 16, 17) extending from the crankshaft gear (15) to a fuel injection cam gear (7), the timing gear train (43) located within an engine timing gear case (8) and including play between the meshed gears, the fuel injection device (23) being adapted to be attached to the engine and including a pump case (1), a fuel-injection pump (2) fixably secured to the pump case (1), the pump case (1) having an end wall (4) in which a connecting portion (5) is arranged, a fuel injection cam shaft (3) bridged within the pump case (1), the fuel injection cam shaft (3) having an input end portion (6) projecting from the connecting portion (5), and a holding means (10) comprising at least one male screw rod arranged in the pump case (1), the method comprising the steps of:

• stopping a revolution of the fuel injection cam shaft (3);
• stopping a revolution of the crankshaft (17);
• holding the fuel injection cam shaft (3) with the pump case (1) in a predetermined position by preventing a forward revolution (3a) and a revolution (3b) of the fuel injection cam shaft (3) by the holding means (10) comprising at least one male screw rod, when stopping the revolution of the fuel injection cam shaft (3);
• holding the crankshaft (17) with the engine in a predetermined position by a mechanical means, when stopping the revolution of the crankshaft (17);
• connecting the pump case (1) at the connecting portion (5) to the engine timing gear case (8), fixing the fuel injection cam gear (7) to the input end portion (6) of the fuel injection cam shaft (3) in a predetermined position, and engaging the fuel injection cam gear (7) with the interlocking gear (16) of the crankshaft gear (15) in a predetermined position;
• turning the pump case (1) connected to the timing gear case (8) about the fuel injection cam shaft (3) in the same direction (19) as the reverse revolution (3b), and then stopping the turning of the pump case (1) and fixably securing the pump case (1) to the timing gear case (8) after the play in the timing gear train (43) has been removed;
• and
• releasing the fuel injection cam shaft (3) and the crankshaft (17) for rotation.

A fuel injection device adapted to be attached to an engine having a timing gear case (8), the fuel injection device comprising:

• a pump case (1) with an end wall (4), the pump case (1) having a connecting portion (5) arranged in the end wall (4), the pump case (1) being rotatably connected at connecting portion (5) to the engine timing gear case (8);
• a fuel injection pump (2) fixably secured to the pump case (1);
• a fuel injection cam shaft (3) spanning the pump case (1), the fuel injection cam shaft (3) having an input end portion (6) projecting from the connecting portion (5);
• and
• a holding means (10) comprising at least one male screw rod arranged in the pump case (1);
• wherein the fuel injection cam shaft (3) is received by the pump case (1) in a predetermined position with the holding means (10) preventing a forward revolution (3a) and a reverse revolution (3b) of the fuel injection cam shaft (3) and a fuel injection cam gear (7) is fixedly secured to the input end portion (6) of the fuel injection cam shaft (3) in a predetermined position, the pump case (1) being fixedly secured to the timing gear case (8) after being turned about the fuel injection cam shaft (3) to a desired position.