# US 8,539,825 B2 · Adjustable simulator apparatus and method for testing vehicle components > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,539,825 B2 - Document ID: US8539825B2 - Status: Granted - Kind: B2 - Application number: 13/166,240 - Filed: 2011-06-22 - Published: 2012-12-27 - Granted: 2013-09-24 - Earliest claimed: 2011-06-22 - Assignees: Bendix Commercial Vehicle Systems LLC - Applicants: Timothy J. Beckwith; Duane R. Johnson; Jeffrey D. Szalkowski - Inventors: Timothy J. Beckwith; Duane R. Johnson; Jeffrey D. Szalkowski - Web page: https://patentgrep.com/patent/US8539825B2 ## CPC - B60T 17/221: {Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems (hydraulic pressure systems in general F15B19/00, F15B21/04; testing structures or apparatus G01M)} - G01M 17/00: Testing of vehicles (testing fluid tightness G01M3/00; testing elastic properties of bodies or chassis, e.g. torsion-testing, G01M5/00; testing alignment of vehicle headlight devices G01M11/06; testing of engines G01M15/00) - B60T: VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL (electrodynamic brake systems for vehicle, in general B60L; brakes per se, i.e. devices where braking effect occurs, including ultimate brake actuators, F16D); ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES - G01M: TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR ## Abstract Various embodiments of an adjustable simulator apparatus for testing vehicle components are disclosed herein. The apparatus can be used to test linearly translatable components, such as transmission or brake components, without connecting them to every cooperating component as they would be in a vehicle. In one embodiment, an adjustable simulator apparatus includes a housing having a bore along a generally longitudinal axis and a first retainer and a second retainer disposed in the housing and spaced apart from one another. At least one of the first and the second retainer is adjustable in its position and a compressible member is disposed between the retainers. The apparatus further includes a piston translatable within the bore and a mechanical stop disposed at least partially within the bore of the housing and extends through the second end of the compressible member. ## Claims ### Claim 1 An adjustable simulator apparatus comprising: a housing having a bore along a generally longitudinal axis; an inwardly extending shoulder of the housing as a first retainer and a second retainer disposed in the housing and spaced apart from one another along the longitudinal axis, wherein at least one of the first and the second retainer is adjustable in its position; a compressible member having a first end and a second end disposed between the first retainer and the second retainer; a mechanical stop disposed at least partially within the bore of the housing and extending longitudinally within the second end of the compressible member; a piston translatable within the bore; and an end cap attached to a distal end of the housing, where the second retainer and the mechanical stop are threaded through the end cap into the housing. ### Claim 2 (depends on 1) The adjustable simulator apparatus as in claim 1, wherein the mechanical stop is adjustable in its position along the bore. ### Claim 3 (depends on 2) The adjustable simulator apparatus as in claim 2, wherein the mechanical stop is a threaded bolt. ### Claim 4 (depends on 1) The adjustable simulator apparatus as in claim 1, wherein the housing has a first diameter at a proximate end of housing and a second diameter at a distal end of housing, wherein the second diameter is larger than the first diameter. ### Claim 5 (depends on 1) The adjustable simulator apparatus as in claim 1, wherein the second retainer is threaded directly to a distal end of the housing. ### Claim 6 An adjustable simulator apparatus comprising: a cylindrical housing having a bore along a generally longitudinal axis; an inwardly extending shoulder of the cylindrical housing as a first retainer and a second retainer disposed within the cylindrical housing and spaced apart from one another along the longitudinal axis, wherein the second retainer is a bolt adjustable in its position along the bore to change the distance between the first retainer and second retainer; a spring element having a first end and a second end disposed between the first retainer and the second retainer and compressible along the bore of the cylindrical housing; a plate disposed within the bore between the first retainer and the second retainer and between the first retainer and the spring, the plate having a first face and a second face, the second face of the plate in contact with the spring element; a mechanical stop disposed longitudinally within the bore of the cylindrical housing and extending through the second end of the spring element, wherein the mechanical stop is a bolt adjustable along the bore and its position is changeable; and a piston translatable within the bore to come into contact with the first face of the plate. ### Claim 7 (depends on 6) The adjustable simulator apparatus as in claim 6, wherein the piston has a start position and a stop position within the cylindrical housing. ### Claim 8 (depends on 7) The adjustable simulator apparatus as in claim 7, wherein the stop position is the position at which the longitudinal movement of the piston within the cylindrical housing is impeded by the mechanical stop. ### Claim 9 (depends on 7) The adjustable simulator apparatus as in claim 7, wherein a distance from the start position to the stop position of the piston ranges from about 0.50 inches to about 1.0 inch. ### Claim 10 (depends on 6) The adjustable simulator apparatus as in claim 6, further comprising: an annular washer disposed between the second end of the spring element and the second retainer. ### Claim 11 An adjustable simulator system comprising: an adjustable simulator apparatus comprising: a cylindrical housing having a bore along a generally longitudinal axis; an inwardly extending shoulder of the cylindrical housing as a first retainer and a second retainer disposed within the cylindrical housing and spaced apart from one another along the longitudinal axis, wherein the second retainer is a bolt adjustable in its position along the bore to change the distance between the first retainer and second retainer; a spring element having a first end and a second end disposed between the first retainer and the second retainer and compressible along the bore of the cylindrical housing; a plate disposed within the bore between the first retainer and the second retainer and between the first retainer and the spring, the plate having a first face and a second face, the second face of the plate in contact with the spring element; a mechanical stop disposed longitudinally within the bore of the cylindrical housing and extending through the second end of the spring element, wherein the mechanical stop is a bolt adjustable along the bore and its position is changeable; and a piston translatable within the bore to come into contact with the first face of the plate; an associated linearly translatable rod operatively connected to the piston; and an associated slave device integral to the rod. ### Claim 12 (depends on 11) The adjustable simulator system as in claim 11, further comprising an associated pedal operatively connected to the associated slave device. ### Claim 13 (depends on 11) The adjustable simulator system as in claim 11, further comprising: a mounting apparatus for maintaining the cylindrical housing and slave device in an axial relationship.