Abstract: An arrangement for isolating an energy transfer system while it is subjected to a test process for noise. The energy transfer system is of the type having an energy input and at least one energy output, and may be mechanical or electrical. The isolation arrangement has a base that supports the energy transfer system in isolation support supporting the energy transfer system, yet affords multiple degrees of freedom with respect to the base. The energy transfer system is clamped in a manner that permits the multiple degrees of freedom with respect to the base, via an engagement arrangement that secures the energy transfer system to the isolation support. The engagement arrangement has a first position with respect to the base wherein the energy transfer system is installable on, and removable from, the isolation support, and a second position wherein the energy transfer system is secured to the isolation support means.

Abstract: An arrangement for isolating an energy transfer system while it is subjected to a test process for noise. The energy transfer system is of the type having an energy input and at least one energy output, and may be mechanical or electrical. The isolation arrangement has a base that supports the energy transfer system. An isolation support supporting the energy transfer system, yet affords multiple degrees of freedom with respect to the base. The energy transfer system is clamped in a manner that permits the multiple degrees of freedom with respect to the base, via an engagement arrangement that secures the energy transfer system to the isolation support. The engagement arrangement has a first position with respect to the base wherein the energy transfer system is installable on, and removable from, the isolation support, and a second position wherein the energy transfer system is secured to the isolation support means.

Abstract: A system for verifying the quality of a pressing operation of a press-fit part onto a receiving portion of a receiving assembly. The system is applicable to the installation of a bearing cup onto a shaft, or a valve seat into a cylinder head. A probe measures a predetermined dimension of the press-fit part to establish a first measurement value. In the case of a valve seat installed a receiving pocket of a cylinder head, a measuring probe is inserted into the receiving pocket of the cylinder head to measure its depth. The depth is recorded as a second measurement value. The valve seat is then pressed into the pocket, and the residual depth is measured to determine the distance between the outermost surface of the pressed in valve seat and the outer surface of the receiving pocket. A computation compares the depth of the pocket against the thickness of the valve seat to determine a difference which is then compared to the residual depth.

Abstract: An arrangement for exercising (or burnishing) the intake and exhaust valves in the cylinder head of an internal combustion engine employs a plurality of out-of-phase eccentric cams coupled to a source of rotatory motion. The eccentric cams engage with respective linear drive arrangements that are urged into out-of-phase reciprocation with respect to each other. The linear drives urge the valves into repeated open and closed states where, in combination with valve rotators, burnishing of the sealing portion of the valves with the valves seats to improve the seal therebetween is effected. The use of eccentric cams to effect linear reciprocating motion achieves control over both directions of movement of the linear drive arrangements. The cylinder head is maintained in fixed relation to the linear drive arrangements by a hydraulic, pneumatic, or other form of ram, the ram also creating a test chamber.

Abstract: An arrangement for isolating an energy transfer system while it is subjected to a test process for noise. The energy transfer system is of the type having an energy input and at least one energy output, and may be mechanical or electrical. The isolation arrangement has a base that supports the energy transfer system. An isolation support supporting the energy transfer system, yet affords multiple degrees of freedom with respect to the base. The energy transfer system is clamped in a manner that permits at least one degree of freedom with respect to the base, via an engagement arrangement that secures the energy transfer system to the isolation support. When mechanical or electrical energy is applied to the energy transfer system, acoustic energy in the form of sound and/or vibration is issued by the energy transfer system under test, which acoustic energy is monitored by an acoustic sensor that issues a corresponding electrical signal.

Abstract: An arrangement for isolating a differential axle system while it is subjected to a test process for noise, also reduces the noise contribution of the differential gear set by coupling a load directly to the differential gear set shaft. The isolation arrangement has a suspension arrangement that supports the differential axle system above the base supports. In a different embodiment, the isolation support supports the differential axle system, yet affords multiple degrees of freedom with respect to the base. The differential axle system is clamped in a manner that permits the multiple degrees of freedom with respect to the base, via an engagement arrangement that secures the differential axle system to the isolation support. The engagement arrangement has a first position with respect to the base wherein the differential axle system is installable on, and removable from, the isolation support, and a second position wherein the differential axle system is secured to the isolation support.

Abstract: A drive coupling arrangement for transmitting torque from a drive arrangement to a gear assembly under test is provided with a first coupler portion attached to the gear assembly under test. The coupler has a polygonal cross-sectional configuration and has a plurality of substantially planar surfaces that extend parallel to the predetermined length of axis, in the form of an assembly nut of the gear assembly under test at a rotatory terminal thereof. A second coupler portion is coupled to the drive arrangement and has an internal cross-sectional configuration that accommodates the polygonal cross-sectional configuration of the first coupler portion. The second coupler portion has a plurality of engagement portions that communicate exclusively with a predetermined number of the substantially planar surfaces of the first coupler portion, and is axially translatable along the first coupler portion for a portion of its length of axis.

Abstract: Processes and apparatus for signal analysis enable “pass/fail” determinations to be made with respect to noisiness of a mechanical or electrical system under test, particularly the presence of bumps and nicks in gear train systems under test. In a process aspect, for a gear system, a torque input is applied. A first signal responsive to the torque applied to the gear system under test is produced, which is converted to digital data responsive to a first correlation between the first signal and time. Peaks in the digital data are measured to determine whether they exceed a predetermined threshold magnitude. The peaks that exceed the predetermined threshold magnitude are subjected to harmonic analysis, the results being compared to gear tooth harmonics to determine whether the peaks constitute an anomaly. Such an anomaly is a bump or a nick on a tooth of the gear system under test.