公开(公告)号：WO1990014515A1

公开(公告)日：1990-11-29

申请号：PCT/US1989003434

申请日：1989-08-11

Applicant: CATERPILLAR INC.

Inventor： CATERPILLAR INC. ,  STRATTON, Michael, K. ,  JESKE, Clifford, O.

IPC: F02F03/00

CPC classification number: F01P3/18 ,  F01M2001/086 ,  F02B3/06 ,  F02B23/0696 ,  F02F3/0069 ,  F02F3/22 ,  F02F2003/0061 ,  F02F2200/04 ,  F05C2201/021 ,  F05C2201/0448 ,  Y02T10/125

Abstract: The design and construction of past articulated pistons has failed to include the most efficient cooling reservoir for conducting heat from the piston to the coolant. The present invention overcomes these problems by using an annular cooling recess (82) of a precisely defined cross sectional shape and volume and a baffle plate (96) fixedly sealingly attached in heat conducting relationship to the piston member (24) to form a cooling gallery (86). The baffle plate (96) has an opening (92) therein and an upwardly extending raised portion (90) to preestablish a trapped volume of coolant therein. The assembly, positioning of the plate (96) and the preestablished trapped volume insures high efficiency of the coolant to absorb heat through the scrubbing action of the coolant on the recess (82) and the heat absorbed by the trapped coolant because of the heat conducting relationship of the plate (96) and the piston member (24).

公开(公告)号：WO1990013758A1

公开(公告)日：1990-11-15

申请号：PCT/US1989003432

申请日：1989-08-11

Applicant: CATERPILLAR INC.

Inventor： CATERPILLAR INC. ,  GRAHAM, Lawrence, F. ,  SWANSON, Victor, E.

IPC: F16F15/10

CPC classification number: F16F15/173 ,  Y10T74/2123

Abstract: A damper (10) of vibrations of the viscous fluid type has a two-piece housing (16) of which a plate (21) is formed by a spinforming process (141). The formed plate (21) has a plurality of internal walls (32) of which at least a portion of the walls (32) are usable as bearing surfaces after being spinformed and require no further machining thereof. The damper (10) includes a plurality of individual bearings (26) for radially and axially positioning a rotatable weight (20) within the housing (16) to form preselected spaces (26) between the housing (16) and the weight (20). An annular supply chamber (27) and the preselected spaces (26) have a viscous fluid (28) disposed therein to provide a damping medium between the rotatable weight (20) and the housing (16).

Abstract translation: 粘性流体型振动的阻尼器（10）具有两件式的壳体（16），其中通过旋转成形工艺（141）形成板（21）。 形成的板（21）具有多个内壁（32），其中至少一部分壁（32）可以在被成形之后用作轴承表面，并且不需要进一步的加工。 阻尼器（10）包括多个单独的轴承（26），用于在壳体（16）内径向和轴向地定位可旋转重物（20），以在壳体（16）和重物（20）之间形成预选空间（26） 。 环形供应室（27）和预选空间（26）具有设置在其中的粘性流体（28），以在可旋转重物（20）和壳体（16）之间提供阻尼介质。

公开(公告)号：WO1990011460A1

公开(公告)日：1990-10-04

申请号：PCT/US1989001971

申请日：1989-05-09

Applicant: CATERPILLAR INC.

Inventor： CATERPILLAR INC. ,  LORIMOR, Larry, W.

IPC: F16D11/00

CPC classification number: F16D48/0206 ,  F16D2048/0209 ,  F16D2048/0224 ,  F16D2048/0281

Abstract: Fluid systems for controlling clutch engagement of a vehicle drive train normally have modulating pressure relief valves to aid in smooth clutch engagement. It is desired in such systems to ensure that the system pressure is reduced during a shift so that the load piston of the modulating pressure relief valve is fully reset prior to engagement of the vehicle drive train. In this arrangement, a fluid system (10) is provided which has a plurality of clutches (12, 14, 16). In order to ensure that the load system is fully reset, a load piston reset control mechanism (110) is provided which establishes a path to vent the pressurized fluid from a load piston pressure chamber (80) of a modulating pressure relief valve (54) in response to the pressure of the fluid in one of the clutches (16) being below a predetermined pressure level.

公开(公告)号：WO1990011435A1

公开(公告)日：1990-10-04

申请号：PCT/US1990000759

申请日：1990-02-12

Applicant: CATERPILLAR INC.

Inventor： CATERPILLAR INC. ,  BAILEY, John, M.

IPC: F02B19/10

CPC classification number: F02B19/14 ,  F02B1/04 ,  F02B19/02 ,  Y02T10/125

Abstract: A fuel combustion system (12) for an Otto-cycle internal combustion engine (10) including a main combustion chamber (14) and an auxiliairy combustion chamber (26). Timing of ignition is effected by opening a control valve device (28) during a latter portion of the compression phase which permits a pressurized combustible mixture (18) to flow from the main combustion chamber (14) and into the auxiliary combustion chamber (26) where the combustible mixture therein is ignited. Hot burning gases emanating from the auxiliary combustion chamber (26) through a suitable directing device (32) provide single or multiple and penetrating sources of ignition for the bulk of the combustible mixture (18) present in the main combustion chamber (14). This arrangement provides a very reliable and long life ignition system for Otto-cycle engines and is especially advantageous for engines which burn a relatively lean combustible mixture.

公开(公告)号：WO1990010850A1

公开(公告)日：1990-09-20

申请号：PCT/US1989001972

申请日：1989-05-09

Applicant: CATERPILLAR INC.

Inventor： CATERPILLAR INC. ,  KYRTSOS, Christos, T. ,  WORRELL, Dean, A.

IPC: G01G19/10

CPC classification number: G01G19/10 ,  E02F9/264 ,  G01G5/04

Abstract: A dynamic payload monitor (10) measures and displays payload weight for a loader vehicle (11) by sensing the hydraulic pressure and position of the lift arm cylinders (14). The payload weight is computed by curve fitting the sensed cylinder pressure and position data to a second order polynomial, and then performing interpolation or extrapolation with a pair of pressure versus position reference parabolas obtained during calibration. The weight computation algorithms used in the dynamic payload monitor (10) is applicable to a number of work vehicles having at least one work implement linkage (12) and at least one hydraulic cylinder (14) for effecting the linkage geometry.

公开(公告)号：WO1990002932A1

公开(公告)日：1990-03-22

申请号：PCT/US1988004088

申请日：1988-11-16

Applicant: CATERPILLAR INC.

Inventor： CATERPILLAR INC. ,  McCOY, Steven, R. ,  STEVENSON, Thomas, T. ,  CARR, Douglas, E. ,  KING, Kevin, D.

IPC: G01L23/22

CPC classification number: F02P5/152 ,  G01L23/225 ,  Y02T10/46

Abstract: A method and apparatus is provided for measuring detonation in an internal combustion engine (14). Vibration sensors (12) located on the engine (14) send signals through a filter (34) which is tuned to the cavity resonance frequency (f) of the engine's cylinders (16, 18, 20, 22, 24, 26). The peaks (A) and valleys (B) of the filtered signals are detected and ratiometrically compared one with another to determine the magnitude of detonation. The detonation information may be used by an engine control (44) to retard timing in response to a predetermined level of detonation.

公开(公告)号：WO1990002872A1

公开(公告)日：1990-03-22

申请号：PCT/US1988004603

申请日：1988-12-23

Applicant: CATERPILLAR INC.

Inventor： CATERPILLAR INC. ,  SHINOGLE, Ronald, D. ,  AUSMAN, Thomas, G.

IPC: F02D41/20

CPC classification number: F02D41/20 ,  F02D2041/2003 ,  F02D2041/2013 ,  F02D2041/2017 ,  F02D2041/2027

Abstract: A solenoid control circuit (160) provides energy to selected solenoids (168a-168c) to control actuation of a control valve of a fuel injector and, hence, the timing and duration of fuel delivered to each cylinder of an internal combustion engine. The current provided to each solenoid is also controlled to provide a three tier current wave form (B) having a pull-in current level (B1), a hold-in current level (B3), and an intermediate current level (B2). Energizing the solenoid at the pull-in current level (B1) starts movement of the control valve. After the control valve starts to move, the current level is reduced to the intermediate level (B2), which is less than the pull-in current level (B1), but great enough to continue movement of the control valve. Further reduction of the current level to the hold-in level (B3), which is less than either of the other current levels but sufficient to hold the control valve at the moved position. The solenoid is then de-energized and the control valve returned to its initial position to stop the flow of fuel to the engine. The foregoing is repeated for each of the other control valves of the fuel injectors to save energy and reduce the heat to be dissipated.

公开(公告)号：WO1989008042A1

公开(公告)日：1989-09-08

申请号：PCT/US1988001474

申请日：1988-05-09

Applicant: CATERPILLAR INC.

Inventor： CATERPILLAR INC. ,  SATZLER, Ronald, L.

IPC: B62D55/30

CPC classification number: B62D55/30

Abstract: Hydraulic recoil mechanisms are useful, for example, in maintaining desired tension in the drive belts of vehicles. The hydraulic components of such mechanisms are prone to leakage over an extended period of frictionally driven belted non-usage and thereby allow the tension in the belts to gradually decrease. The subject belt tension control system (62) includes a friction locking device (52) to automatically lock the piston rod (41) relative to the cylinder (36) to maintain a predetermined level of tension in the belt (18) when the pump (63) which furnishes pressurized hydraulic fluid to the system stops operating. Thus, the frictional couple between the belt (18) and the drive wheel (16) is maintained during periods of non-use and the parking brake is effective to hold the vehicle at a stationary position.

公开(公告)号：WO1989005985A1

公开(公告)日：1989-06-29

申请号：PCT/US1988000460

申请日：1988-02-18

Applicant: CATERPILLAR INC.

Inventor： CATERPILLAR INC. ,  STRATTON, Kenneth, L. ,  BITAR, Ali, A.

IPC: G01S15/58

CPC classification number: G01S15/586 ,  G01S15/87

Abstract: A velocity reference system (10) uses a Doppler shift between transmitted and received wave energy to determine the relative speed between the system (10) and a surface (14) or element. Other systems employing Doppler shifts for detecting velocity suffer from poor measurement accuracy. Cross talk between channels of systems having multiple transmitters and receivers produces measurement errors. Additionally, errant movement generates measurement errors since the sensors cannot distinguish such errant movement from forward velocity. Two sensing units (16, 16') directed towards one another, and preferably towards the same location on the surface (14), effectively eliminates random vehicle movement. Furthermore, transmitting different frequencies from the two sensing units (16, 16') reduces cross talk between the two channels. Vehicle applications require a system capable of minimizing errant movement and environmental noise.

公开(公告)号：WO1989005865A1

公开(公告)日：1989-06-29

申请号：PCT/US1988004470

申请日：1988-12-14

Applicant: CATERPILLAR INC. ,  TIPTON, Sheryl, A. ,  KEIL, Gary, D. ,  HOLLOWAY, Gregory, S. ,  GROMER, Dave, R. ,  BILTGEN, Gary, L.

Inventor： CATERPILLAR INC.

IPC: C21D01/74

CPC classification number: C23C8/22 ,  C21D1/78

Abstract: A process for forming a carburized steel article includes carburizing a steel material containing not more that 0.10% silicon and less than 1.1% chromium to form an austenitic surface matrix having a high density of carbides dispersed therein. After quenching, the carburized steel article is characterized by an outer surface having a high ratio of carbides and is substantially free of intergranular oxides. As a result of preventing undesirable surface oxide formations and simultaneously providing a beneficial surface carbide structure, the bending fatigue strength, wear properties, and contact fatigue strength of articles such as gears, shafts, bearings and couplings are greatly enhanced.

Abstract translation: 形成渗碳钢制品的方法包括对不含0.10％的硅和小于1.1％的铬的钢材进行渗碳以形成其中分散有高密度碳化物的奥氏体表面基质。 淬火后，渗碳钢制品的特征在于具有高比例的碳化物的外表面，并且基本上不含晶间氧化物。 作为防止不希望的表面氧化物形成并同时提供有益的表面碳化物结构的结果，大大提高了诸如齿轮，轴，轴承和联轴器的制品的弯曲疲劳强度，磨损性能和接触疲劳强度。