Valve timing controller

A valve timing controller provided in a driving force transfer system for transferring a driving force from a driving shaft of an internal combustion engine to a driven shaft for opening or closing at least one of an intake valve and an exhaust valve, the valve timing controller adjusting a timing of opening or closing at least one of the intake valve and the exhaust valve, the valve timing controller comprising:

• a housing including a plurality of receiving chambers that rotate along with one of the driving shaft and the driven shaft, the receiving chambers being arranged in a direction of rotation within a predetermined angle;
• a vane rotor that rotates with the other of the driving shaft and the driven shaft, the vane rotor having vanes respectively received in the receiving chambers, each of vanes being turned toward a retard side and toward an advance side relative to the housing by pressure of a working fluid in a plurality of retard hydraulic chambers and advance hydraulic chambers formed by partitioning the respective receiving chambers by the vanes;
• a retard passage for supplying the working fluid from a fluid supply source to the respective retard hydraulic chambers;
• a first advance passage for supplying the working fluid from the fluid supply source to the respective advance hydraulic chambers;
• a check valve disposed in a first advance passage, the check valve allowing a flow of the working fluid from the fluid supply source to the advance hydraulic chamber, the check valve prohibiting a flow of the working fluid from the advance hydraulic chamber to the fluid supply source, and
• a second advance passage for discharging the working fluid in the advance hydraulic chamber,
• wherein the second advance passage discharges the working fluid in the advance hydraulic chamber when the fluid supply source supplies the working fluid into the retard hydraulic chambers,
• wherein the retard passage, the first advance passage, and the second advance passage connect with the retard hydraulic chamber or the advance hydraulic chamber through a bearing of the driven shaft and the driven shaft, and
• wherein the check valve is disposed closer to an advance hydraulic chamber of the first advance passage than the bearing.

A valve timing controller provided in a driving force transfer system for transferring a driving force from a driving shaft of an internal combustion engine to a driven shaft for opening or closing at least one of an intake valve and an exhaust valve, the valve timing controller adjusting a timing of opening or closing at least one of the intake valve and the exhaust valve, the valve timing controller comprising:

• a housing including a plurality of receiving chambers that rotate along with one of the driving shaft and the driven shaft, the receiving chambers being arranged in a direction of rotation within a predetermined angle;
• a vane rotor that rotates with the other of the driving shaft and the driven shaft, the vane rotor having vanes respectively received in the receiving chambers, each of vanes being turned toward a retard side and toward an advance side relative to the housing by pressure of a working fluid in a plurality of retard hydraulic chambers and advance hydraulic chambers formed by partitioning the respective receiving chambers by the vanes;
• a retard passage for supplying the working fluid from a fluid supply source to the respective retard hydraulic chambers;
• a first advance passage for supplying the working fluid from the fluid supply source to the respective advance hydraulic chambers;
• a check valve disposed in a first advance passage, the check valve allowing a flow of the working fluid from the fluid supply source to the advance hydraulic chamber, the check valve prohibiting a flow of the working fluid from the advance hydraulic chamber to the fluid supply source;
• a second advance passage for discharging the working fluid in the advance hydraulic chamber, wherein the second advance passage discharges the working fluid in the advance hydraulic chamber when the fluid supply source supplies the working fluid into the retard hydraulic chambers;
• and
• a switching valve for switching supply of the working fluid to the retard hydraulic chambers and the advance hydraulic chambers and discharge of the working fluid from the retard hydraulic chambers and the advance hydraulic chambers,
• wherein the retard passage, the first advance passage, and the second advance passage connect with the retard hydraulic chamber or the advance hydraulic chamber through a bearing of the driven shaft and the driven shaft, and
• wherein the switching valve is disposed closer to the working fluid supply source than the bearing.