公开(公告)号：WO1991019634A1

公开(公告)日：1991-12-26

申请号：PCT/US1990004749

申请日：1990-08-23

Applicant: CATERPILLAR INC.

Inventor： CATERPILLAR INC. ,  JOHNSON, Mark, L. ,  OERTLEY, Thomas, E.

IPC: B62D55/088

CPC classification number: B62D55/092 ,  B62D55/0887 ,  B62D55/202

Abstract: An endless track chain (10) is provided with a rotatable sleeve (66) that is mounted about the track bushing (44) to provide the track with longer external bushing life. The rotatable sleeve is sealed and lubricated, as is the standard track joint. However, each is separate from the other with its own supply of lubricant. As a consequence, a failure of a seal for the rotatable sleeve has no effect on the track hinge joint (40).

公开(公告)号：WO1991018715A1

公开(公告)日：1991-12-12

申请号：PCT/US1990004681

申请日：1990-08-20

Applicant: CATERPILLAR INC.

Inventor： CATERPILLAR INC. ,  ROUSSIN, Michael, A. ,  CROWELL, Charles, M., Jr.

IPC: B25D17/24

CPC classification number: B25D17/24 ,  B25D17/28 ,  E02F5/326 ,  Y10S37/904

Abstract: Impact rippers are useful for transmitting high impact blows to a hard material for fracturing the material. When linear reciprocating rams are used, a mounting arrangement which will withstand high compressive forces and still allow the ram to reciprocate must be used to mount the ram within a tool holder. The subject impact ripper apparatus (10) includes a tool holder (16) having a cavity (58) for mounting a linear ram (18). The linear ram (18) is mounted within the cavity (58) by a plurality of laminated pads (19) which withstand compressive force, but still allows the ram to reciprocate. This arrangement provides for a resilient mounting arrangement which is stiff in compression, but relatively soft in shear.

公开(公告)号：WO1991017615A2

公开(公告)日：1991-11-14

申请号：PCT/US1990004677

申请日：1990-08-20

Applicant: CATERPILLAR INC.

Inventor： CATERPILLAR INC. ,  WILLIAMSON, Gregory, L.

IPC: H04L12/40

CPC classification number: H04L12/40006 ,  H04L12/42 ,  H04L43/00 ,  H04L2012/40273 ,  Y04S40/168

Abstract: Full diagnostic capability is provided in a serial datalink (500) network having a plurality of control modules (502A, 502B, 502C). Each control module (502, 502B, 502C) includes a differential receiver (612, 613) for providing noise immunity and a transmitter (610, 611) having a positive line driver (922, 923) and a negative line driver (920, 921). Positive and negative transmission wires (606, 607, 608, 609) connect differential receivers (612, 613) to the positive and negative line drivers (920, 921, 922, 923). Circuits (614, 615) sense the occurrence of a short circuit condition between the positive transmission wires (606, 608) and ground and between the negative transmission wires (607, 609) and supply voltage. Overcurrents in the positive and negative transmission wires (606, 607, 608, 609) are also detected.

公开(公告)号：WO1991017363A1

公开(公告)日：1991-11-14

申请号：PCT/US1990004679

申请日：1990-08-20

Applicant: CATERPILLAR INC.

Inventor： CATERPILLAR INC. ,  SMITH, Glenn, G. ,  STAPLETON, Edward, L.

IPC: F15B13/08

CPC classification number: F15B11/162 ,  E02F9/2232 ,  E02F9/2296 ,  F15B2211/20553 ,  F15B2211/30535 ,  F15B2211/3111 ,  F15B2211/3122 ,  F15B2211/324 ,  F15B2211/351 ,  F15B2211/50518 ,  F15B2211/5153 ,  F15B2211/55 ,  F15B2211/6054 ,  F15B2211/653 ,  Y10T137/87169

Abstract: Load sensing hydraulic systems conserve energy by generating only the fluid flow demanded by the system and at a pressure only slightly greater than the highest load pressure of the system. Optimizing the operating characteristics of the system for certain applications also caused the variable displacement pump to go to its maximum displacement setting with the excess fluid generated thereby not doing any useful work. The load sensing hydraulic system (10) includes a flow control valve (51) connected to a directional control valve (17) and has an operating position in which fluid exhausted from a hydraulic jack (18) is transmitted therethrough to a tank (11). A signal valve (69) is disposed in a control pressure signal line (68) for controlling fluid flow therethrough from a supply conduit (14) to one end (56) of the flow control valve (51). When the signal valve is blocking fluid flow through the signal line (68), the flow control valve is in the above-noted operating position. When the signal valve permits fluid flow through the signal line, the flow control valve is moved to a position to block fluid flow therethrough to the tank. The signal valve is connected to the directional control valve (17) for movement therewith to establish the blocking or fluid transmitting positions.

公开(公告)号：WO1991017351A1

公开(公告)日：1991-11-14

申请号：PCT/US1990004676

申请日：1990-08-20

Applicant: CATERPILLAR INC.

Inventor： CATERPILLAR INC. ,  VERHEYEN, Michael, R. ,  ANTONE, James, A. ,  GRAJALES, Liliana

IPC: F02D41/40

CPC classification number: F02D41/2096 ,  H01L41/042 ,  H02N2/067

Abstract: An apparatus (200) is provided for controllably connecting and disconnecting a piezoelectric actuator (205) to and from an energy source (210) to effect the displacement of a piezoelectric actuator (205) for a fuel injector. Precise control of the timing and duration of the piezoelectric actuator (205) is necessary to ensure that a proper quantity of fuel is delivered to each cylinder of an internal combustion engine. A charging and discharging means (235, 240) monitors the voltage level of the piezoelectric actuator (205), and the charging and discharging current of the piezoelectric actuator (205). Further, a smoothing means (245) aids in levelling the charging and discharging current to better approximate a constant current to control the piezoelectric actuator (205) providing a precise quantity of fuel to be delivered.

公开(公告)号：WO1991016227A1

公开(公告)日：1991-10-31

申请号：PCT/US1990003956

申请日：1990-07-16

Applicant: CATERPILLAR INC.

Inventor： CATERPILLAR INC. ,  PRICE, Robert, J. ,  WILSON, Douglas, A.

IPC: B62D55/00

CPC classification number: B62D55/08 ,  Y10S180/906

Abstract: A track laying work vehicle (10) has an undercarriage assembly (16) including a rigid support beam (46) and first and second roller frame assemblies (36, 38), one on either side of the vehicle (10). Each roller frame assembly (36, 38) has first and second end portions (52, 54, 56, 58) and supports a rotatable idler wheel assembly (40, 42) at the first end portion (52, 56) and a powered drive wheel (26, 28) at the second end portion (54, 58). Each drive wheel (26, 28) is frictionally engaged with a drive axle (22, 24) of the vehicle (10) and can be engaged with a drive axle (22, 24) at a plurality of lateral positions on the axle (22, 24). The first end portion (52, 56) of each roller frame assembly (36, 38) is releasably connected to one end (84, 86) of the support beam (46) and is laterally moveable on the support beam (46). An endless track (48, 50), such as an elastomeric belt (60, 62), encircles a respective drive wheel (26, 28), roller frame assembly (36, 38), and idler wheel assembly (40, 42) on each side of the vehicle (10). By moving the track roller frame assembly (36, 38) and drive wheel (26, 28) laterally along the drive axle (22, 24) and support beam (46) respectively, various gage settings of the endless track (48, 50) are provided.

公开(公告)号：WO1991015052A1

公开(公告)日：1991-10-03

申请号：PCT/US1990002700

申请日：1990-05-18

Applicant: CATERPILLAR INC.

Inventor： CATERPILLAR INC. ,  HOFFMAN, John, P.

IPC: H02M03/07

CPC classification number: H03K17/6872 ,  H02M3/07

Abstract: A signal generator (10) is provided for delivering non-overlapping charge and discharge signals to a voltage multiplier circuit (12). The multiplier circuit (12) has a discharge switch (70) for receiving the discharge signal (S5) and connecting a booster capacitor (64) in series with an input voltage source (13) and in parallel with a storage capacitor (62), thereby transferring charge from the booster capacitor (64) to a storage capacitor (62). The multiplier circuit (10) further includes charge switch (72) which receives the charge signal and delivers the input voltage potential to the booster capacitor (64) for charging. The signal generator (10) advantageously provides an interval of time between the charge and discharge signals, thereby preventing sporadic discharges from the booster capacitor (64) and undesirable power losses.

公开(公告)号：WO1991002196A1

公开(公告)日：1991-02-21

申请号：PCT/US1989004167

申请日：1989-09-25

Applicant: CATERPILLAR INC.

Inventor： CATERPILLAR INC. ,  SHAFER, Scott, F. ,  TOWE, Carey, A.

IPC: F23Q07/00

CPC classification number: F23Q7/001

Abstract: An improved mechanical joint structure (10, 10') is provided and adapted for positively retaining a heating element within a bore of a body of a glow plug. The glow plug (14, 14') includes a body (18, 18'), a heating element (22) and a ferrule (26, 26'). The ferrule (26, 26') is sealingly positioned radially between an internal surface (42) of the body bore (34) and a peripheral surface (58) of the heating element (22). The glow plug (14, 14') further includes a compressing structure (30) for positively compressing an internal surface (74) of the ferrule (26, 26') against the peripheral surface (58) of the heating element (22) in response to the heating element (22) being forced into the body bore (34) by, for example, the gas pressure developed in an operating engine combustion chamber. Unlike conventional brazed or interference joints used in typical glow plugs, the present invention provides a normal force (Fn), for sealing the heating element, and an axially-directed frictional force (Ff), for retaining the heating element, which both increase as the heating element is forced deeper into the body bore (34).

公开(公告)号：WO1990011923A1

公开(公告)日：1990-10-18

申请号：PCT/US1989002755

申请日：1989-06-26

Applicant: CATERPILLAR INC.

Inventor： CATERPILLAR INC. ,  PURCELL, Robert, J.

IPC: B62D55/112

CPC classification number: B62D55/0655 ,  B62D55/08 ,  B62D55/104 ,  B62D55/30

Abstract: A suspension system (12) for a non-powered belted vehicle (10) includes a pair of wheel assemblies (16, 18, 22, 24) positioned on each side of the vehicle (10), a flexible endless belt (28, 30) encircling each pair of wheel assemblies (16, 18, 22, 24), and an axle assembly (32) extending transverse to the wheel assemblies (16, 18, 22, 24). The wheel assemblies (16, 18, 22, 24) are connected to the axle assembly (32) by a plurality of pivotal arms (34, 36, 38, 40) and each pair of wheel assemblies (16, 18, 22, 24) are interconnected by a fluid actuated cylinder (68). Belted vehicles which utilize smooth wheels to frictionally engage the belt for driving and stopping the belt, require considerable tension between the wheels and the belt. High belt tension is desirable for driving and stopping but unnecessarily high belt tension is undesirable due to overstressing of vehicle components. The subject suspension system (12) utilizes a variable load applied to the vehicle (10) to increase the belt tension for efficient vehicle operation.

公开(公告)号：WO1990011441A1

公开(公告)日：1990-10-04

申请号：PCT/US1989002077

申请日：1989-05-15

Applicant: CATERPILLAR INC.

Inventor： CATERPILLAR INC. ,  BROWN, Richard, L.

IPC: F02D11/10

CPC classification number: G05G1/38 ,  B60K26/02 ,  F02D11/106 ,  Y10T74/20534

Abstract: Pedal mounted sensors are useful in motor vehicles for delivering an electrical signal correlative to the position of the accelerator pedal. The electrical signal is then used by an engine controller to regulate the amount of fuel supplied to the engine. Some pedal mounted sensors deliver analog signals which are subject to fault conditions which an engine controller can not distinguish from valid operating conditions. Remotely mounted sensors are difficult to install and repair. The subject invention is directed to pedal mounted sensors (10) which have a potentiometer (52) and circuit board (46) hermetically sealed and mounted on a pedal (14) for delivering pulse-width-modulated signal having a duty factor responsive to the pedal position.