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WO2018189704A1 - Agencement de culbuteurs pour un moteur à combustion interne - Google Patents

Agencement de culbuteurs pour un moteur à combustion interne Download PDF

Info

Publication number
WO2018189704A1
WO2018189704A1 PCT/IB2018/052553 IB2018052553W WO2018189704A1 WO 2018189704 A1 WO2018189704 A1 WO 2018189704A1 IB 2018052553 W IB2018052553 W IB 2018052553W WO 2018189704 A1 WO2018189704 A1 WO 2018189704A1
Authority
WO
WIPO (PCT)
Prior art keywords
rocker
valve tappet
electricity
operational element
electrical
Prior art date
Application number
PCT/IB2018/052553
Other languages
English (en)
Inventor
Stefano FARISE'
Original Assignee
Gnutti Carlo S.P.A.
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
Application filed by Gnutti Carlo S.P.A. filed Critical Gnutti Carlo S.P.A.
Publication of WO2018189704A1 publication Critical patent/WO2018189704A1/fr

Links

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
    • 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
    • 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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2201/00—Electronic control systems; Apparatus or methods therefor
    • 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
    • F01L2820/00—Details on specific features characterising valve gear arrangements
    • F01L2820/04—Sensors

Definitions

  • This invention relates to a valve tappet for an internal combustion engine. More specifically, the invention relates to a valve tappet having a rocker equipped with an operational element.
  • the operational element normally has an hydraulic activation by which, by suitably conveying oil under pressure, it is possible to move a piston thanks to which the activation described above is performed.
  • Operational elements are also known which comprises on-off type sensors installed on the rockers to signal, for example, the activated or deactivated condition of a component supported by the rocker.
  • the aim of this invention is to provide a valve tappet for an internal combustion engine which is able to overcome the drawbacks of the prior art and which is at the same time simple to make and effective to use,
  • a further aim of the invention is to provide a valve tappet for an infernal combustion engine which is practical to power.
  • Another aim of the invention is to provide a valve tappet for an internal combustion engine which is able to communicate effectively with the electronic control unit of the vehicle.
  • the reference numeral 1 denotes in their entirety parts of a valve tappet for an internal combustion engine (not illustrated), made in accordance with this invention. scriptios
  • the valve tappet 1 comprises a rocker 2 configured to control, either directly or by the interposition of a bridge not illustrated, the movement of one or two valves 3, of which one is illustrated schematically purely by way of example.
  • the rocker 2 has a central hole 4 designed to house a shaft, not illustrated, for oscillation of the rocker 2 about a respective axis A1 of oscillation.
  • the valve tappet 1 comprises, positioned on the rocker 2 and schematically illustrated as a block 5 in the drawing, an electrical operational element. !n this description, the term electrical operational element is used to mean one between an electrical sensor and an electrical actuator.
  • the above-mentioned electrical operational element is designed to perform a function associated with the operation of the rocker 2 during the use of the infernal combustion engine in which the valve tappet 1 is located.
  • valve tappet comprises, schematically illustrated with a block 6, means of electricity supply to the above-mentioned operational element 5 which are at least partly supported by the rocker 2.
  • the above-mentioned electricity supply means 6 are electrically connected to the operational element 5.
  • the electricity supply means 6, described in more detail below, are of the wireless type,
  • the electricity supply means 6 transmit an electrical signal to the electrical operational element 5 and, advantageously, the valve tappet 1 comprises a device 7 for controlling the electrical signal.
  • control device 7 advantageously comprises a rectifier, that is to say, a device designed for rectifying an alternating electrical signal into a unidirectional electrical signal.
  • the device 7 for controlling the electrical signal comprises a capacitive element.
  • the device 7 for controlling the electrical signal comprises a storage battery.
  • the above-mentioned wireless electricity supply means 5 comprise, not illustrated, a device for transmitting electricity positioned separate from the rocker 2 and a device for receiving electricity positioned on the rocker 2.
  • the above-mentioned transmitter and receiver devices are configured for transferring between each other a predetermined quantity of electricity and therefore, in other words, for transferring the quantity of electricity to the rocker 2 without the use of wires.
  • the phenomenon at the basis of such a transfer is basically that of inductive coupling which occurs when an electric current passes through a normal cable, creating around itself a magnetic field which in turn inducers a current in a nearby cable,
  • the above-mentioned and not illustrated device for transmitting electricity and device for receiving electricity define a magnetic inductive coupling.
  • This type of inductive coupling has been shown to be particularly effective for low frequency and short range energy sources.
  • the wireless connection by magnetic inductive coupling also has the particular feature of reaching higher performance levels with low power and reduced dimensions.
  • the above-mentioned and not illustrated device for transmitting electricity and device for receiving electricity define a resonant inductive coupling.
  • This type of coupling advantageously uses a structure with two coils which are tuned in order to resonate at the same frequency and give form to a resonance or resonant transformer. The electricity is transmitted between the two resonant coils.
  • the resonance phenomenon is used for increasing the distance at which an efficient transfer of electricity can be performed.
  • the wireless electricity supply means 8 are of the so-called “energy harvesting” type, that is to say, operating according to a process for wireless collecting and storage of electricity.
  • the conversion of a mechanical motion into electricity may be performed by means of piezoelectric crystals or special polymers, which, when subjected to mechanical deformation forces, generate small electrical voltages.
  • an electrodynamic energy generator may be used wherein the energy collection is based on a vibrating system wherein a coil and a magnet have a relative movement and an alternating voltage is generated at the terminals of the coil.
  • thermoelectric generator for example of the Peltier cell type
  • a thermoelectric generator which is able to convert thermal gradients into electricity.
  • electromagnetic radiation that is, any electromagnetic emission (radio waves, Wi-Fi) which may be collected and used.
  • the actions which result in the production of electricity can come from mechanical vibrations of motors.
  • valve tappet 1 comprises, schematically represented as a block 8, a unit for the computerised command and control of the electrical operational element.
  • the above-mentioned computerised command and control unit 8 is supported by the rocker 2.
  • the computerised command and control unit 8 is electrically connected to the operational element 5 by means of a respective cable 9.
  • unit computerised command and control unit 8 comprises a microcontroller.
  • the microcontroller of the command and control unit 8 is configured for processing and/or analysing the data transmitted from the electrical operational element 5.
  • the microcontroller of the control unit 8 has a frequency of execution of the instructions of at least 50 MIPS (millions of instructions per second). !t has been experimentally proven that the frequency of 50 MIPS is the minimum frequency for execution of the instructions which is able to guarantee the requested operation of the microcontroller of the control unit 8 on the rocker 2.
  • the electrical operational element 5 is one between an electrical sensor and an electrical actuator.
  • the electrical operational element 5 may comprise either one or more sensors or one or more actuators.
  • the electrical operational element 5 may comprise simultaneously one or more sensors and one or more actuators.
  • the sensor defining the electrical operational element 5 is an accelerometer and the function performed by it is measuring the acceleration status to which the rocker 2 is subjected during the driving status of the internal combustion engine.
  • the sensor included in the electric operational element 5 is an extensometer and the function performed by it is measuring the stress status of the rocker.
  • the operational element 5 is a different type of sensor, configured for measuring physical quantities different from the acceleration and from the stress status.
  • the function performed by it is advantageously moving a unit supported by the rocker 2.
  • the actuator is used to move relative to the rocker 2 an element supported by the rocker 2.
  • the element not illustrated is integrated in a unit designed to operate the activation of the engine brake.
  • control unit which normally controls the operation of numerous apparatuses of the vehicle, not lastly the device for feeding fuel into the cylinders.
  • the computerised command and control unit 8 located on the rocker 2 is advantageously configured for communicating in wireless mode with the above-mentioned data processing unit 10 or control unit.
  • This communication consists basically in the transmission of data between the above-mentioned computerised unit 8 and the control unit 10.
  • the above-mentioned data transmission for example actuated by radio waves, is schematically illustrated in the drawing with the reference numeral 1 1 .
  • the data generated by the operational element 5, whether it is a sensor or an actuator are received from the computerised command and control unit 8 which processes and/or analyses the data.
  • the computerised command and control unit 8 advantageously comprises a microcontroller specially configured to perform the processing and/or analysis of data.
  • the data processed by the computerised unit 8 by the above-mentioned microcontroller are then sent to the processing unit 10 external to the rocker 2.
  • the above-mentioned communication between the computerised command and control unit 8 and the data processing unit 10 consists in collecting by the latter of data processed transmitted by the former and also from the input, imparted to the computerised unit 8 from the processing unit 10 to activate the electrical operational element 5 on the basis of other operating parameters of the vehicle processed by the control unit 10.
  • the activation constitutes an example of a command imparted by the control unit 10 to the computerised unit 8 located on the rocker 2 and transmitted by the unit 8 to the operational element 5, when there is need to activate the engine brake.
  • the senor defining the electrical operational element 5 communicates directly, according to prior art technologies, not further described, for wireless data transmission, with the above-mentioned data processing unit 8.
  • This invention achieves the preset aims and brings important advantages, A first of these advantages is given by the opportunity to provide a substantially smart valve tappet which is able to communicate with the outside, without the need for a physical connection consisting of a cable. This opportunity advantageously makes it possible to provide details both on the operation (for example acceleration) and on the status (stress status) of the rocker.
  • Another advantage linked to the invention is given by the opportunity to measure and monitor, by means of one or more suitable sensors (for example, accelerometers) arranged on the rocker, the clearance existing between the rocker and the valve resulting from wear.
  • suitable sensors for example, accelerometers
  • the availability of the information on the state of wear advantageously allows avoiding the adoption of complex and expensive hydraulic tappets of known type for automatically recovering the clearance and proceeding, on the other hand, to the recovery of the clearance (by suitable adjustment) when the opportunity is signalled by the sensor(s). In effect, it is a sort of "on- demand" adjustment.
  • Yet another advantage linked to the invention is due to the possibility of processing and/or analysing the data supplied by the electrical operational element 5 directly on the rocker 2 by means of the computerised unit 8, thereby limiting the data traffic towards the external processing unit 10.
  • the computerised unit 8 processes and/or analyses the raw data directly on the processor, the data transmitted to the external processing unit 10 are "smart" data and reduced in terms of quantity.
  • This circumstance constitutes an advantage both in terms of energy, as it allows a reduction in the amount of output information in wireless mode from the rocker 2 towards the external computerised unit 10, and in terms of processing requirements as it allows a reduction in the data processing activities to be performed on the external unit 10 which may therefore be less powerful and hence less expensive.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

L'invention concerne un poussoir de soupape, comprenant une bascule (2) oscillante autour d'un axe respectif (A) d'oscillation pour commander le mouvement d'au moins une soupape (3), un élément opérationnel électrique (5) supporté par la bascule (2), l'élément opérationnel électrique (5) étant conçu pour exécuter une fonction associée au fonctionnement de la bascule (2).
PCT/IB2018/052553 2017-04-12 2018-04-12 Agencement de culbuteurs pour un moteur à combustion interne WO2018189704A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102017000040874 2017-04-12
IT102017000040874A IT201700040874A1 (it) 2017-04-12 2017-04-12 Punteria di motore endotermico.

Publications (1)

Publication Number Publication Date
WO2018189704A1 true WO2018189704A1 (fr) 2018-10-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2018/052553 WO2018189704A1 (fr) 2017-04-12 2018-04-12 Agencement de culbuteurs pour un moteur à combustion interne

Country Status (2)

Country Link
IT (1) IT201700040874A1 (fr)
WO (1) WO2018189704A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220213945A1 (en) * 2019-04-08 2022-07-07 Itt Manufacturing Enterprises Llc Cap sensor

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1085186A2 (fr) * 1999-09-16 2001-03-21 Siemens Canada limited Système de commande électronique de papillon avec communication sans fil
JP2013079581A (ja) * 2011-10-01 2013-05-02 Daihatsu Diesel Mfg Co Ltd 内燃機関の構成部品の識別装置
US20150270718A1 (en) * 2014-03-20 2015-09-24 Hitachi-Lg Data Storage Korea, Inc. Method and apparatus for transmitting power wirelessly
EP3018797A1 (fr) * 2014-11-07 2016-05-11 The Boeing Company Procédés d'orientation d'un champ magnétique pour transmission intelligente de puissance sans fil
WO2016086067A1 (fr) * 2014-11-25 2016-06-02 Eaton Corporation Générateurs entraînés par mouvement de culbuteurs pour dispositifs électroniques montés sur culbuteurs
WO2016197088A1 (fr) * 2015-06-04 2016-12-08 Eaton Corporation Rampe de culbuteurs à verrouillage électrique ayant une fonctionnalité de diagnostic embarqué (obd) intégrée

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1085186A2 (fr) * 1999-09-16 2001-03-21 Siemens Canada limited Système de commande électronique de papillon avec communication sans fil
JP2013079581A (ja) * 2011-10-01 2013-05-02 Daihatsu Diesel Mfg Co Ltd 内燃機関の構成部品の識別装置
US20150270718A1 (en) * 2014-03-20 2015-09-24 Hitachi-Lg Data Storage Korea, Inc. Method and apparatus for transmitting power wirelessly
EP3018797A1 (fr) * 2014-11-07 2016-05-11 The Boeing Company Procédés d'orientation d'un champ magnétique pour transmission intelligente de puissance sans fil
WO2016086067A1 (fr) * 2014-11-25 2016-06-02 Eaton Corporation Générateurs entraînés par mouvement de culbuteurs pour dispositifs électroniques montés sur culbuteurs
WO2016197088A1 (fr) * 2015-06-04 2016-12-08 Eaton Corporation Rampe de culbuteurs à verrouillage électrique ayant une fonctionnalité de diagnostic embarqué (obd) intégrée

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220213945A1 (en) * 2019-04-08 2022-07-07 Itt Manufacturing Enterprises Llc Cap sensor

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