Abstract: A method for monitoring slide bearings (8, 10, 11) of a crank mechanism (12) of a piston engine is described, comprising at least one cylinder (1) whose piston (2) is drivably connected with a crankshaft (4) via a connecting rod (5) which is loaded alternatingly under tension and under pressure by the piston (2) in the zone of a dead center of the crank mechanism (12) depending on the cycle of the piston engine, with an operating parameter which changes on the occurrence of bearing damage being repeatedly measured and evaluated. In order to provide advantageous conditions for the method it is proposed that the piston position is measured at the dead center of the crank mechanism (12) under pressure load of the connecting rod (5) on the one hand and under tensile load of the connecting rod (5) on the other hand and the difference between the piston positions for the tensile and pressure load is evaluated.

Abstract: A method is described for monitoring slide bearings (10, 6, 9), especially of a piston engine, with a forced feed lubrication (12) comprising a forced-oil line (16) and branch lines (17) branching off from the forced-oil line (16) for the supply with oil of at least one slide bearing (10, 6, 9), with an operating parameter which changes on the occurrence of bearing damage being repeatedly measured and evaluated. In order to provide advantageous process conditions it is proposed that the rates of oil flow and/or the oil pressures in the branch lines (17) are measured and temporal changes to said operating parameters are evaluated for monitoring the bearing.

Abstract: A method for monitoring slide bearings (8, 10, 11) of a crank mechanism (12) of a piston engine is described, comprising at least one cylinder (1) whose piston (2) is drivably connected with a crankshaft (4) via a connecting rod (5) which is loaded alternatingly under tension and under pressure by the piston (2) in the zone of a dead center of the crank mechanism (12) depending on the cycle of the piston engine, with an operating parameter which changes on the occurrence of bearing damage being repeatedly measured and evaluated. In order to provide advantageous conditions for the method it is proposed that the piston position is measured at the dead center of the crank mechanism (12) under pressure load of the connecting rod (5) on the one hand and under tensile load of the connecting rod (5) on the other hand and the difference between the piston positions for the tensile and pressure load is evaluated.

Abstract: A method is described for monitoring slide bearings (10, 6, 9), especially of a piston engine, with a forced feed lubrication (12) comprising a forced-oil line (16) and branch lines (17) branching off from the forced-oil line (16) for the supply with oil of at least one slide bearing (10, 6, 9), with an operating parameter which changes on the occurrence of bearing damage being repeatedly measured and evaluated. In order to provide advantageous process conditions it is proposed that the rates of oil flow and/or the oil pressures in the branch lines (17) are measured and temporal changes to said operating parameters are evaluated for monitoring the bearing.