Abstract:
An actuator for a valve lift control device linearly moves a control shaft to change a valve lift in accordance with an axial position of the control shaft. A first and a second rotation cam integrally rotate around a common rotation axis by transmission of torque, so that a direct acting follower, which includes a first and a contact members, linearly moves with a control shaft. The first and a second rotation cams are respectively in contact with the first and the second contact members via a first and a second contact points. The first contact point is located on the opposite side of the second contact point with respect to the rotation axis. A sum of a first rotation cam lift of the first rotation cam and a second rotation cam lift of the second rotation cam is substantially constant in a predetermined rotation angular range of the first rotation cam and the second rotation cam.
Abstract:
A device for internal combustion engines particularly automobile engines, which varies the opening duration and the lift of the timing valves. This variation results from the utilization of all or part of the profile of an alternating cam of which the motion about an axis is provided by rotating main cams which contact rollers carried on the alternating cam, and is transmitted to a roller in contact with the lever which then actuates the valve. The timing is varied by adjusting the position of the roller by means of support arms by which the roller is displaced with respect to the alternating cam and lever.
Abstract:
A hybrid vehicle includes an internal combustion engine and a rotary electric machine. The internal combustion engine includes a variable valve actuating device configured to change an operation characteristic of an intake valve. The rotary electric machine is configured to generate driving force for propelling the hybrid vehicle. A controller for the hybrid vehicle includes a traveling control unit and a valve actuation control unit. The traveling control unit executes traveling control for causing the hybrid vehicle to travel by using the driving force of the rotary electric machine while stopping the internal combustion engine. The traveling control unit starts up the internal combustion engine while executing the traveling control. The valve actuation control unit controls the variable valve actuating device. The valve actuation control unit, when the internal combustion engine is started up while the traveling control is executed, sets at least one of a valve lift and valve operating angle of the intake valve such that the at least one of the valve lift and valve operating angle of the intake valve when the hybrid vehicle travels at a first vehicle speed is smaller than the corresponding at least one of the valve lift and valve operating angle of the intake valve when the hybrid vehicle travels at a second vehicle speed. The second vehicle speed is lower than the first vehicle speed.
Abstract:
The invention relates to an electro-hydraulic valve actuator having a cylinder and an alternating cam and comprising: a valve-actuating hydraulic cylinder (2) which opens a valve of an internal combustion engine (100) using a valve-opening solenoid valve (4), a high-pressure valve-opening duct (11) and a high-pressure inflow hydraulic circuit (5), and which closes said valve using a valve-closing solenoid valve (6), a high-pressure valve-closing duct (12) and a high-pressure outflow circuit (7); and a hydraulic positive displacement pump (8) co-operating with a pump inlet non-return valve (14) and a pump outlet sealing solenoid valve (13), the outlet thereof being connected to a low-pressure circuit (9) and to a low-pressure tank (10) supplied by a replenishment pump (52) and a replenishment tank (53).
Abstract:
The device disclosed has a multiple-element rotary transmission with a housing which accommodates the valve, a rotary cam connected to the housing via a revolute joint and driven by the crankshaft, an intermediate element actuated by the cam via a cam joint, and an output element which abuts on the housing and co-operates with the intermediate element via a joint and which transmits the movement to the valve. To obtain a simpler, more compact and more rigid structure, the intermediate element abuts on the housing via a cam joint, the cam of said cam joint, which is arranged on the intermediate element, has a section which forms a catch and a control section, and either the position of the cam of said cam joint, which abuts on the housing, or the position of the revolute joint of the cam can be adjusted during operation.
Abstract:
The present invention relates to a sliding cam module for a camshaft, which comprises at least one sliding cam with at least one cam segment, comprising at least two cams with cam tracks that are different to one another as well as a closed bearing element, which is arranged on the sliding cam in a rotatable and axially non-displaceable manner for mounting the sliding cam, wherein the bearing element comprises a recipient area to hold at least one section of a locking device to lock the sliding cam in an axial position. Furthermore, the invention relates to a camshaft with at least one corresponding sliding cam module as well as a shaft, on which the sliding cam module is arranged in a rotationally fixed manner and can be moved in an axial direction along a longitudinal axis of the shaft and a cover module, which comprises a cylinder-head cover as well as a closed bearing element, which comprises a recipient area to hold at least one section of a locking device to lock the sliding cam in an axial position.
Abstract:
A continuously variable valve lift apparatus may include a camshaft, a cam portion on which a cam is formed and into which the camshaft is inserted, a slider housing into which the cam portion is rotatably inserted and a position thereof is rotatable around a pivot shaft, a control portion configured to selectively push the slider housing to be rotated, a spring guide connected to the slider housing for elastically supporting the slider housing, a rotation deliverer configured to transmit rotation of the camshaft to the cam portion, an output portion rotatable around the pivot shaft and onto which a valve shoe is formed, and a valve unit configured to be driven by the valve shoe.
Abstract:
In a valve drive train device for an internal combustion engine of motor vehicle, wherein at least one axially movably mounted cam element including at least one cam set with at least two cam parts and a shifting gate with at least two gate track for converting a rotary movement of the cam element into an axial shifting motion, at least one of the cam parts and the adjacent gate track are disposed in an at least partially axially overlapping relationship for reducing thereby the axial length and the mass of the cam element or permitting the use of a larger, highly durable, actuating mechanism.
Abstract:
A hybrid vehicle includes an internal combustion engine and a rotary electric machine. The internal combustion engine includes a variable valve actuating device configured to change an operation characteristic of an intake valve. The rotary electric machine is configured to generate driving force for propelling the hybrid vehicle. A controller for the hybrid vehicle includes a traveling control unit and a valve actuation control unit. The traveling control unit executes traveling control for causing the hybrid vehicle to travel by using the driving force of the rotary electric machine while stopping the internal combustion engine. The traveling control unit starts up the internal combustion engine while executing the traveling control. The valve actuation control unit controls the variable valve actuating device. The valve actuation control unit, when the internal combustion engine is started up while the traveling control is executed, sets at least one of a valve lift and valve operating angle of the intake valve such that the at least one of the valve lift and valve operating angle of the intake valve when the hybrid vehicle travels at a first vehicle speed is smaller than the corresponding at least one of the valve lift and valve operating angle of the intake valve when the hybrid vehicle travels at a second vehicle speed. The second vehicle speed is lower than the first vehicle speed.
Abstract:
A reciprocating piston internal combustion engine having at least one camshaft with at least one sliding cam element with sliding cams and sliding grooves (2 and 2a) intersecting in an X-shape, wherein the sliding cam element with internal teeth (4) is mounted for conjoint rotation but axially movably on a toothed shaft (5), and wherein a guide element is fixed between the sliding grooves (2 and 2a), which guide element has elastically movable switch blades (10 and 10a) that are guided on a rotary joint plate (12) mounted in the intersection area. The engine further has an actuator device with at least one actuator pin (9) movable out of a housing, wherein the actuator device can be mounted on a component of a cylinder head or on the cylinder head of the reciprocating piston internal combustion engine, and, after having moved out, the actuator pin (9) comes into connection with at least one sliding groove (2 or 2a) of the sliding cam element, said guide element being constructed as a C-shaped spring (6) and fixed, at least at the ends thereof, on the toothed shaft (5).