Abstract: Utility vehicle, in particular for military purposes, with a chassis and a cab arranged on it frame so that it can be tilted, and guarded in certain places by affixed armor plating. The cab has a front module and a rear module, whereby the front module has a front wall, two side walls, a rear wall, a floor and a roof forming a cabin for the driver and co-driver. The rear module has a bearer frame enclosed at least in part by walls that form a hood-like protective and stowage space for the power aggregate and other vehicle parts and accessories. The rear module is releaseably attached to the rear of the front module and supported by it. Rear armoring of the cab is implemented by armor plating fitted between its front module and rear module.

Abstract: A drive unit and a method for the operation thereof. The drive unit has an internal combustion engine in operative connection with a driven shaft and a reciprocating piston expansion engine in an operative connection with a crankshaft. The driven shaft is mechanically connected to the crankshaft by a clutch in such a way that torque is transmitted from the crankshaft to the driveshaft. The reciprocating piston expansion engine has at least one cylinder, and a fluid is guided from a fluid supply into an interior of the at least one cylinder at least occasionally via an inlet valve and a bypass valve which is arranged in parallel with the inlet valve.