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Valve timing control apparatus

  • US 8,991,346 B2
  • Filed: 12/04/2013
  • Issued: 03/31/2015
  • Est. Priority Date: 12/04/2012
  • Status: Active Grant
First Claim
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1. A valve timing control apparatus that controls opening timing and closing timing of one of an intake valve and an exhaust valve of an internal combustion engine, which is opened and closed by a driven-side shaft of the internal combustion engine, through changing of a rotational phase between a driving-side shaft of the internal combustion engine and the driven-side shaft, the valve timing control apparatus comprising:

  • a housing that is rotatable integrally with the driving-side shaft;

    a vane rotor that is rotatable relative to the housing according to a hydraulic pressure of an advancing chamber formed in the housing and a hydraulic pressure of a retarding chamber formed in the housing, wherein the vane rotor is fixed to the driven-side shaft;

    a hydraulic pressure control valve that includes;

    a sleeve that is received in a center hole of the vane rotor, which extends in a direction of a rotational axis of the vane rotor; and

    a spool that is received in an inside of the sleeve and is configured to reciprocate along the sleeve, wherein the hydraulic pressure control valve changes a hydraulic pressure, which is supplied to or is discharged from the advancing chamber, and a hydraulic pressure, which is supplied to or is discharged from the retarding chamber, through movement of the spool;

    a solenoid that includes;

    a solenoid main body that is opposed to the housing; and

    a press pin that projects from the solenoid main body and is configured to press the spool of the hydraulic pressure control valve, wherein the solenoid controls the changing of the hydraulic pressures at the hydraulic pressure control valve;

    a first tubular portion that extends from the housing toward the solenoid; and

    a second tubular portion that extends from the solenoid main body or an installation member, to which the solenoid main body is installed, toward the housing and is fitted to the first tubular portion, wherein the second tubular portion cooperates with the first tubular portion to form an oil accumulation chamber that is configured to accumulate at least one of;

    oil outputted from a gap between the housing and the vane rotor; and

    oil discharged from an oil passage communicated with the advancing chamber or the retarding chamber.

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