Abstract: Devices for dividing the process of fuel injection into two phases, i.e., pre-injection and main injection, with a pressure relief body opening up an expansion space when the fuel injection pump has reached a given level of pressure, are known to be provided with a by-pass line which can shut off by a spring-loaded slide valve. A simpler design of such a pressure relief system is achieved by having the by-pass line lead from the expansion space to a by-pass opening which is located in the cylinder wall of the pressure chamber of the pump and is intermittently covered by the pump plunger, and by making this opening cooperate with control edges on the pump plunger, leaving it uncovered in the injection-free state.

Abstract: An internal combustion engine whose engine unit support, comprising such sound-generating parts as cylinders, cylinder head, piston rods, crankshaft bearings, crankshaft, is provided with a bracket of at least two arms at least at its output end. This bracket is attached to the bearing seats of the crankshaft and is provided with at least one sound-insulating element at each end of its arms for connecting said engine unit support to the crankcase. This will reduce any relative movements between the crankshaft and the crankcase in a simple manner.

Abstract: A compression ignition direct injection internal combustion engine comprising at least each one cylinder, a piston and an injection nozzle, the cylinder having an inlet port for inducing rotation of the incoming air about the axis of the cylinder and a combustion chamber or cavity in the form of a body of rotation disposed in the piston, said chamber having, below the crown of the piston, a constriction which divides the chamber into an upper and a lower part.