초록 ▼

A bench testing system creates a predetermined wear and friction environment wherein wear elements, illustratively a piston ring and a cylinder liner, can be tested, along with lubricant properties, under simulated conditions of an internal combustion engine. The effects of speed and normal load can

A bench testing system creates a predetermined wear and friction environment wherein wear elements, illustratively a piston ring and a cylinder liner, can be tested, along with lubricant properties, under simulated conditions of an internal combustion engine. The effects of speed and normal load can be examined under multiple lubrication regimes, and variations in the coefficient of friction can be observed as a function of crank angle degree. Profilocorder techniques are used to examine photomicroscopic surface characteristics. The cylinder wall wear element is supported in a first support arrangement that is driven reciprocatingly along a substantially axial path. A dynamic counter-reciprocating arrangement is coupled thereto for controlling second harmonic inertial forces. A second support arrangement that supports the piston ring wear element is coupled to a linear drive that urges same in a direction transverse to the substantially axial path of reciprocation of the cylinder wall wear element. A force gauge coupled to the linear drive produces data corresponding to the force being applied thereby. A further force gauge measures the friction force. Rotational data is obtained from a rotational encoder, and a lubricant supply arrangement provides lubrication in accordance with a plurality of lubrication regimes.

대표청구항 ▼

1. A system for simulating a friction environment between first and second wear elements in frictional communication with one another, the system comprising:a first support arrangement for supporting the first wear element; a reciprocating drive arrangement for driving said first support arrangement

1. A system for simulating a friction environment between first and second wear elements in frictional communication with one another, the system comprising:a first support arrangement for supporting the first wear element; a reciprocating drive arrangement for driving said first support arrangement reciprocatingly along a substantially axial path of reciprocation; a dynamic counterbalance arrangement coupled to said reciprocating drive arrangement; a rotatory drive coupling arrangement coupled to said reciprocating drive arrangement and to said dynamic couterbalance arrangement; a motor coupled to said rotatory drive coupling arrangement for supplying a rotatory mechanical energy thereto; a second support arrangement for supporting the second wear element, said second support arrangement being arranged to enable a tilt displacement of the second wear element with respect to the frictional communication with the first wear element, the tilt displacement of the second wear element being responsive to said reciprocating drive arrangement for simulating the frictional environment; a linear drive coupled to said second support arrangement for urging same in a direction transverse to said substantially axial path of reciprocation; and a force gauge coupled to said linear drive for producing an electrical force signal responsive to a force applied to said second support arrangement.