摘要:
A valve opening and closing timing control apparatus (1) includes: a driving side rotator (A) disposed rotatably about a rotation axis (X) and configured to rotate synchronously with a crankshaft (2); a driven side rotator (B) disposed rotatably about the rotation axis and configured to be rotatable relative to the driving side rotator and to rotate integrally with a valve opening/closing camshaft (3); a phase adjustment mechanism (C) configured to set a relative rotation phase between the driving side and driven side rotators by a driving force of an electric actuator (M), a biasing member (25) provided on an outer periphery of a drive shaft to apply a biasing force in a direction such that an inner gear is engaged with a ring gear; and a displacement regulation portion (R) configured to regulate a displacement of the inner gear.
摘要:
A valve opening and closing timing control apparatus (1) includes: a driving side rotator (A) disposed rotatably about a rotation axis (X) and configured to rotate synchronously with a crankshaft (2) of an internal combustion engine (E); a driven side rotator (B) disposed rotatably about the rotation axis and configured to be rotatable relative to the driving side rotator and to rotate integrally with a valve opening and closing camshaft (3) of the internal combustion engine; and a phase adjustment mechanism (C) configured to set a relative rotation phase between the driving side rotator and the driven side rotator by a driving force of an electric actuator (M). The phase adjustment mechanism includes: an internally toothed ring gear (21); an inner gear (22); and a drive shaft (24), and the valve opening and closing timing control apparatus further includes: a biasing member (25); and a displacement regulation portion (T).
摘要:
A valve timing control apparatus (10) includes: a drive-side rotational member (1, 11) synchronously rotating with a drive shaft (C) of an internal combustion engine (E); a driven-side rotational member (2, 12) disposed inside the drive-side rotational member and integrally rotating with a valve opening/closing camshaft (101, 206); a hydrostatic pressure chamber (4) formed by partitioning a space between the drive-side rotational and driven-side rotational members; an advance angle chamber (41, Ra) and a retardation angle chamber (42, Rb) formed by dividing the hydrostatic pressure chamber; an intermediate lock mechanism (8, L) able to selectively switch between locked and unlocked states; an advance angle flow path (43, 221) allowing the hydraulic fluid to be circulated; a retardation angle flow path (44, 222) allowing the hydraulic fluid to be circulated; a control valve (51, V) having a spool (52, 232); and a phase control unit (90) controlling the control valve.
摘要:
This disclosure reliably causes transition to a locked state at the time of deactivation of an internal combustion engine and reliably causes transition to the locked state when a locking mechanism is not in the locked state at the time of activation of the internal combustion engine. A spool (50) of a control valve is capable of being operated to a phase control position (PA2, PL, PB2) in which the supply and discharge of a fluid to and from an advance port (40A) and a retard port (40B) is controlled while the fluid is supplied to a lock releasing port (40L), and to a lock transition position (PA1, PA2) in which the supply and discharge of the fluid to and from the advance port (40A) and the retard port (40B) is controlled while the fluid is discharged from the lock releasing port (40L). A communication path (W) through which a portion of the fluid from a pump port (40P) is discharged to a drain port (40DA, 40DB) when the spool (50) is operated to the lock transition position (PA1, PA2) is formed.
摘要:
A valve opening/closing timing control apparatus includes a phase displacing mechanism 1 for displacing relative phase between a drive-side rotational member 12 and a driven-side rotational member 11 rotatable in unison with a cam shaft, a locking mechanism 6 capable of locking the relative phase to an intermediate locking phase suitable for starting and releasing this lock by a work fluid when needed and an urging mechanism 3 configured to provide an urging function for urging the phase displacing mechanism 1 toward an advancing side in a restricted range between an intermediate restricting phase located more on the retarding side than the intermediate locking phase and a most retarding phase.
摘要:
A valve timing control apparatus (10) includes: a drive-side rotational member (1, 11) synchronously rotating with a drive shaft (C) of an internal combustion engine (E); a driven-side rotational member (2, 12) disposed inside the drive-side rotational member and integrally rotating with a valve opening/closing camshaft (101, 206); a hydrostatic pressure chamber (4) formed by partitioning a space between the drive-side rotational and driven-side rotational members; an advance angle chamber (41, Ra) and a retardation angle chamber (42, Rb) formed by dividing the hydrostatic pressure chamber; an intermediate lock mechanism (8, L) able to selectively switch between locked and unlocked states; an advance angle flow path (43, 221) allowing the hydraulic fluid to be circulated; a retardation angle flow path (44, 222) allowing the hydraulic fluid to be circulated; a control valve (51, V) having a spool (52, 232); and a phase control unit (90) controlling the control valve.
摘要:
This disclosure reliably causes transition to a locked state at the time of deactivation of an internal combustion engine and reliably causes transition to the locked state when a locking mechanism is not in the locked state at the time of activation of the internal combustion engine. A spool (50) of a control valve is capable of being operated to a phase control position (PA2, PL, PB2) in which the supply and discharge of a fluid to and from an advance port (40A) and a retard port (40B) is controlled while the fluid is supplied to a lock releasing port (40L), and to a lock transition position (PA1, PA2) in which the supply and discharge of the fluid to and from the advance port (40A) and the retard port (40B) is controlled while the fluid is discharged from the lock releasing port (40L). A communication path (W) through which a portion of the fluid from a pump port (40P) is discharged to a drain port (40DA, 40DB) when the spool (50) is operated to the lock transition position (PA1, PA2) is formed.