摘要:
A phase angle detection apparatus includes an intermediate rotary member changing an operating angle of a driven member that is driven by a driving member, a detection unit detecting a rotational angle of the intermediate rotary member, which corresponds to the operating angle of the driven member, and outputting the rotational angle as a detection pulse signal, a controller receiving the detection pulse signal and calculating a pulse rising time difference between the detection pulse signal and a pre-set reference pulse signal. The controller detects, based on the pulse rising time difference, a predetermined middle angle position of the driven member from all the operating angles of the driven member.
摘要:
A variable valve timing control apparatus of an internal combustion engine has a drive rotary member rotated by an engine crankshaft, a driven rotary member fixedly connected to a camshaft and transferring a turning force from the drive rotary member to the camshaft, and a phase-change mechanism changing a relative rotational phase between the drive and driven rotary members and having an intermediate rotary member installed between the drive and driven rotary members for a relative rotational phase control. The variable valve timing control apparatus further has a holding mechanism and a releasing mechanism. The holding mechanism forces the intermediate rotary member and holds the relative rotational phase between the drive and driven rotary members, and the releasing mechanism releases a holding state of the holding mechanism.
摘要:
A valve timing control apparatus for an internal combustion engine which comprises a variable valve timing mechanism which varies an opening-and-closing timing of an intake valve and/or an exhaust valve of an engine, and in which the opening-and-closing timing at a time of starting the engine is set to a starting time timing which is at a further advance side than a maximum retard timing which is retarded at the maximum, said apparatus characterized in that, at a time of stopping the engine, the variable valve timing mechanism is controlled such that the opening-and-closing timing is made to be the starting time timing.
摘要:
In a structure with a variable valve timing mechanism which varies an opening-and-closing timing of an intake valve and/or an exhaust valve due to a rotational phase of a camshaft with respect to a crankshaft of an internal combustion engine being varied, the rotational phase is detected in an arbitrary timing regardless of a rotational period of the camshaft, and the variable valve timing mechanism is controlled on the basis of the detected rotational phase.
摘要:
In a structure in which an opening-and-closing timing of an intake valve and/or an exhaust valve is varied due to a rotational phase of a camshaft with respect to a crankshaft of an internal combustion engine being varied, the rotational phase is detected at each rotational period of the camshaft on the basis of a reference rotational position of the crankshaft and a reference rotational position of the camshaft which have been detected, and on the other hand, the rotational phase is detected in an arbitrary timing regardless of the rotational period of the camshaft. Further, a correction value for correcting the rotational phase detected in an arbitrary timing is learned with the rotational phase detected at each rotational period of the camshaft as a reference.
摘要:
In a structure with a variable valve timing mechanism which varies an opening-and-closing timing of an intake valve and/or an exhaust valve due to a rotational phase of a camshaft with respect to a crankshaft of an internal combustion engine being varied, the rotational phase is detected in an arbitrary timing regardless of a rotational period of the camshaft, and the variable valve timing mechanism is controlled on the basis of the detected rotational phase.
摘要:
In a rotational phase adjusting apparatus for adjusting a difference in rotational phase between a first element and a second element by controlling an engagement therebetween through a third element whose condition is set by a movement of a fourth element,an elastic member is arranged between the fourth element and the one of the first and second elements, and a brake generates a variable braking force to be applied to the fourth element so that a rotational positional relationship between the fourth element and the one of the first and second elements and a value of a force applicable from the fourth element to the third element are elastically variable in accordance with a value of the variable braking force.
摘要:
A centric phase of an operating angle of an engine valve is detected on the basis of an interval between a reference rotational position of a crankshaft and a reference rotational position of a camshaft, and on the other hand, the centric phase is detected at a period shorter than a period between the reference rotational positions, and one of those detected results is selected on the basis of a predetermined regulation, and an opening characteristic of the engine valve is operated on the basis of the selected centric phase.
摘要:
A centric phase of an operating angle of an engine valve is detected on the basis of an interval between a reference rotational position of a crankshaft and a reference rotational position of a camshaft, and on the other hand, the centric phase is detected at a period shorter than a period between the reference rotational positions, and one of those detected results is selected on the basis of a predetermined regulation, and an opening characteristic of the engine valve is operated on the basis of the selected centric phase.
摘要:
A valve timing control apparatus includes a phase varying mechanism arranged to vary a relative rotational phase of a cam shaft with respect to a crank shaft; a driving mechanism arranged to provide a driving force to the phase varying mechanism by energization; a control mechanism configured to control a current applied to the driving mechanism; and a phase angle sensing mechanism arranged to sense the relative rotational phase of the cam shaft with respect to the crank shaft, and to have a detection period longer than a control period of the control mechanism in accordance with an engine operating state. The control mechanism is configured to repeat increasing and decreasing of the current applied to the driving mechanism when the phase varying mechanism continuously varies the relative rotational phase of the cam shaft with respect to the crank shaft by a predetermined angle or more.