EP0396154A2 - Dispositif de mise hors d'actions d'une soupape pour moteur à combustion interne - Google Patents

Dispositif de mise hors d'actions d'une soupape pour moteur à combustion interne Download PDF

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Publication number
EP0396154A2
EP0396154A2 EP90110325A EP90110325A EP0396154A2 EP 0396154 A2 EP0396154 A2 EP 0396154A2 EP 90110325 A EP90110325 A EP 90110325A EP 90110325 A EP90110325 A EP 90110325A EP 0396154 A2 EP0396154 A2 EP 0396154A2
Authority
EP
European Patent Office
Prior art keywords
tubular
drive pin
shoulder
valve
tubular drive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP90110325A
Other languages
German (de)
English (en)
Other versions
EP0396154A3 (fr
EP0396154B1 (fr
Inventor
Zdenek Sidonius Meistrick
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jacobs Vehicle Systems Inc
Original Assignee
Jacobs Manufacturing Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US06/763,962 external-priority patent/US4592319A/en
Application filed by Jacobs Manufacturing Co filed Critical Jacobs Manufacturing Co
Priority to AT90110325T priority Critical patent/ATE95279T1/de
Priority to EP90110325A priority patent/EP0396154B1/fr
Publication of EP0396154A2 publication Critical patent/EP0396154A2/fr
Publication of EP0396154A3 publication Critical patent/EP0396154A3/fr
Application granted granted Critical
Publication of EP0396154B1 publication Critical patent/EP0396154B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/06—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for braking
    • F01L13/065—Compression release engine retarders of the "Jacobs Manufacturing" type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L1/181—Centre pivot rocking arms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/0273—Multiple actuations of a valve within an engine cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/04—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation using engine as brake
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/08—Shape of cams

Definitions

  • This invention relates to a valve disabling mechanism employed in internal combustion engines which may be switched from the normal powering mode to a retarding mode of the compression-release type.
  • a further alternative way to disable the exhaust valve is to provide an eccentric bushing in the rocker arm pivot so as to raise the pivot or fulcrum and thereby introduce a lost motion in the valve train.
  • Such a device is shown, for example in U.S. Patent 3 367 312.
  • other lost motion mechanisms may also be used; see for example U.S. Patent 3 786 792.
  • EP-A 0 037 269 which concerns engine cylinder cutout systems in which for the cutout cylinders the exhaust valves are kept open while the intake valves are kept closed.
  • the disengageability of the intake valve train is accomplished by a two-part pushtube, the two parts being telescopically slidable with respect to each other and having locking means to prevent telescopic sliding in the normal powering mode of the engine.
  • the locking means are controlled by means of a hydraulically actuated piston accommodated between the outer portion of the two-part pushtube and a housing.
  • a valve disabling mechanism for an internal combustion engine having a valve train mechanism, characterized by tubular driven means affixed to the valve train mechanism and having first and second shoulder means, tubular drive pin means coaxially disposed within the tubular driven means and communicating at one end with the valve train mechanism, the tubular drive pin means having third and fourth shoulder means and a plurality of transverse radial ports, actuating pin means coaxially disposed within the tubular drive pin means and adapted to reciprocate between first and second positions within the tubular drive pin means, the actuating pin means having fifth and sixth shoulder means, first biasing means interposed between the actuating pin means and the tubular drive pin means and adapted to bias the drive pin means towards said first position, second biasing means disposed between the second and third shoulder means, and locking means loosely disposed within the transverse radial ports and being moveable between a first position in engagement with the first shoulder for conjoint movement of the tubular driven means and the tubular drive pin means and a second position in engagement
  • a valve disabling mechanism in accordance with the invention shown in Fig. 1A and 1B comprises a tubular adjusting screw 310.
  • Fig. 1A shows the valve disabling mechanism during the powering mode of engine operation wherein it performs the function of the adjusting screw of the rocker arm.
  • Fig. 1B shows the same mechanism during the retarding mode of engine operation wherein it disables the rocker arm 50 and, therefore, the exhaust valves.
  • Point 308 represents the point about which rocker arm 50 pivots when actuated by a pushtube 52.
  • the tubular adjusting screw 310 which replaces the solid adjusting screw is locked in its adjusted position by a locknut 312.
  • the tubular adjusting screw 310 is provided with three concentric bores.
  • a large bore 314 extends a short distance from the pushtube end of the adjusting screw 310.
  • An intermediate bore 316 extends from the large bore 314 substantially to the top of the adjusting screw 310.
  • a small bore 318 extends through the top of the adjusting screw 310.
  • a sloping shoulder 320 is formed between the large bore 314 and the intermediate bore 316 while a horizontal shoulder 322 is formed between the intermediate bore 316 and the small bore 318.
  • a drive pin 324 is positioned within the adjusting screw 310.
  • the maximum diameter of the drive pin 324 is slightly less than the diameter of the intermediate bore 316 to permit reciprocation of the drive pin 324 relative to the adjusting screw 310.
  • One end of the drive pin 324 is adapted to mate with, and be driven by, the pushtube 52.
  • a snap ring 326 limits the downward (as shown in Figs. 1A and 1B) movement of the drive pin 324 relative to the adjusting screw 310.
  • the upper portion of the drive pin 324 has an outside diameter 328 which is slightly smaller than the small bore 318 of the adjusting screw 310 so as to permit relative reciprocation of the drive pin 324 and adjusting screw 310.
  • a shoulder 330 is defined by the diameter 328 of the upper portion of the drive pin 324 and the maximum diameter of the drive pin.
  • a compression spring 332 is located within the adjusting screw 310 between shoulders 322 and 330 so as to bias the drive pin 324 downwardly (as shown in Figs. 1A and 1B) relative to the adjusting screw 310.
  • a plurality of ports 334 are disposed around the circumference of the drive pin 324 in the region of its largest diameter. The ports 334 are directed angularly downwardly (as shown in Figs. 1A and 1B) from the outside of the drive pin 324 toward the axis of the drive pin.
  • a stepped cavity 336 is formed within the drive pin 324.
  • the largest diameter 338 of the stepped cavity 336 communicates at its upper region with the plurality of ports 334, and with an intermediate diameter 340 through a sloping shoulder 342.
  • the intermediate diameter 340 terminates at a shoulder 344 while a smaller diameter section 346 extends from the shoulder 344 through the top of the drive pin 324.
  • a stepped actuator pin 348 is mounted for reciprocating motion with respect to the drive pin 324 and includes a large diameter section 350, an intermediate diameter section 352 and a small diameter section 354.
  • a sloping shoulder 356 joins the larger diameter section 350 and the intermediate diameter section 352 while a horizontal shoulder 358 is located between the intermediate and small diameter sections of the actuator pin 348.
  • a ball 362 is located in each of the ports 334.
  • the balls 362 are larger in diameter than the wall thickness of the drive pin 324 in the region of the ports 334 so that when the actuator pin 348 is in its uppermost position (as shown in Fig. 1B) the balls 362 extend outside the drive pin 324 and engage the shoulder 320 of the adjusting screw 310.
  • the sloping shoulder 320 cams the balls 362 inwardly so that the balls 362 rest, at least partially, on the sloping shoulder 356 of the actuator pin 348. In this position (Fig. 1B), the balls 362 clear the shoulder 320 and the adjusting screw 310 is free to reciprocate with respect to the drive pin 324 so that no movement is imparted to pushtube 52.
  • Point 364 (Fig. 1B) represents the maximum upward excursion of the drive pin 324 as a result of the upward movement of the exhaust valve pushtube 52.
  • the distance 366 (Fig. 1B) represents a clearance (which should be a minimum of about 0.100 ⁇ ) between point 364 and the rest position of the master piston 66 ⁇ (or 224 shown in Fig. 2A).
  • the master piston 66 ⁇ (or 224) is biased toward its rest position by the leaf spring 120 ⁇ (or 236 shown in Figs. 2A and 2B).
  • the hydraulic circuit will be pressurized by the low pressure pump and the master piston 66 ⁇ will be driven downwardly (as viewed in Figs. 1A and 1B) until it contacts the end of the drive pin.324 against the bias of leaf spring 120 ⁇ and compression spring 360.
  • the motion of the pushtube 52 will be transmitted through the drive pin 324 to the master piston 66 ⁇ but the rocker arm 50 will remain at rest since the drive pin 324 will be disengaged from the adjusting screw 310.
  • Figs. 2A and 2B illustrate a mechanism which is very similar to the mechanism shown in Figs. 1A and 1B but which is designed to delay but not entirely disable the motion of the intake valve.
  • the rocker arm 232 is an intake valve rocker arm
  • the pushtube 228 is an intake valve pushtube
  • the master piston 224 is located in alignment with the intake valve pushtube 228 within a master cylinder 226 located in the retarder housing.
  • Figs. 2A and 2B are intended principally to provide the intake valve delay, it will be appreciated that this mechanism may be used whenever a delay in the intake or exhaust valve motion is required. Similarly, the mechanism of Figs. 1A and 1B may be used whenever the intake or exhaust valves are required to be disabled.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Valve Device For Special Equipments (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
EP90110325A 1985-08-09 1986-05-26 Dispositif de mise hors d'actions d'une soupape pour moteur à combustion interne Expired - Lifetime EP0396154B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT90110325T ATE95279T1 (de) 1985-08-09 1986-05-26 Vorrichtung fuer die ausschaltung eines ventils einer brennkraftmaschine.
EP90110325A EP0396154B1 (fr) 1985-08-09 1986-05-26 Dispositif de mise hors d'actions d'une soupape pour moteur à combustion interne

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US06/763,962 US4592319A (en) 1985-08-09 1985-08-09 Engine retarding method and apparatus
US763962 1985-08-09
EP90110325A EP0396154B1 (fr) 1985-08-09 1986-05-26 Dispositif de mise hors d'actions d'une soupape pour moteur à combustion interne

Related Parent Applications (3)

Application Number Title Priority Date Filing Date
EP88111487.0 Division 1986-05-26
EP88111487A Division EP0302288B1 (fr) 1985-08-09 1986-05-26 Commande de soupape avec dispositif de désaccouplement
EP86107117.3 Division 1986-05-26

Publications (3)

Publication Number Publication Date
EP0396154A2 true EP0396154A2 (fr) 1990-11-07
EP0396154A3 EP0396154A3 (fr) 1991-04-03
EP0396154B1 EP0396154B1 (fr) 1993-09-29

Family

ID=66687164

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90110325A Expired - Lifetime EP0396154B1 (fr) 1985-08-09 1986-05-26 Dispositif de mise hors d'actions d'une soupape pour moteur à combustion interne

Country Status (2)

Country Link
EP (1) EP0396154B1 (fr)
AT (1) ATE95279T1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103346657A (zh) * 2013-07-26 2013-10-09 侯惜之 磁铁铁芯线圈一体式发电机

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4141333A (en) * 1975-01-13 1979-02-27 Gilbert Raymond D Valve train systems of internal combustion engines
EP0037269A1 (fr) * 1980-03-28 1981-10-07 Engine Control Industries Ltd. Système pour la mise hors service des cylindres d'un moteur à combustion interne
US4411229A (en) * 1981-02-09 1983-10-25 Mile-Age Research Corporation Cylinder deactivation device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4141333A (en) * 1975-01-13 1979-02-27 Gilbert Raymond D Valve train systems of internal combustion engines
EP0037269A1 (fr) * 1980-03-28 1981-10-07 Engine Control Industries Ltd. Système pour la mise hors service des cylindres d'un moteur à combustion interne
US4411229A (en) * 1981-02-09 1983-10-25 Mile-Age Research Corporation Cylinder deactivation device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103346657A (zh) * 2013-07-26 2013-10-09 侯惜之 磁铁铁芯线圈一体式发电机

Also Published As

Publication number Publication date
EP0396154A3 (fr) 1991-04-03
EP0396154B1 (fr) 1993-09-29
ATE95279T1 (de) 1993-10-15

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