Abstract:
Die Erfindung betrifft eine Steuerwelle einer Nockenwellenverstelieinheit mit axial beabstandeten Verstellnocken, die in einem ersten axialen Abschnitt der Steuerwelle für einen Zylinderdauerbetrieb und in einem zweiten axialen Abschnitt für eine Zylinderabschaltung ausgebildet sind, wobei die Verstellnocken für den Zylinderdauerbetrieb über ihren gesamten Umfang des Nockenkreises eine Radialerstreckung aufweisen, die größer ist als eine Nullhuberstreckung, und die Verstellnocken für die Zylinderabschaltung in Umfangsrichtung einen Abschaltabschnitt des Nockenkreises mit einer Radialerstreckung aufweisen, die kleiner oder gleich der Nullhuberstreckung ist, wobei die Steuerwelle einen die Rotation in beide Umfangsrichtungen beschränkenden Anschlag aufweist, der als Kalibrierungspunkt für eine Motorelektronik dient.
Abstract:
The invention relates to a method and position sensor assembly for determining a mutual position between a first object and a second object. The position sensor assembly comprises a first body, a coil, a control unit, and a sensor circuit, said first body being reciprocally displaceable in the axial direction in relation to said coil. The sensor circuit comprises in turn a comparator connected to a first branch comprising said coil, a power switch, and a measuring resistance coupled in series with each other.
Abstract:
A method of operating an internal combustion engine having an ; electromagnetically driven intake valves for a vehicle. With the method, deviation of an opening operation of the electromagnetically driven intake valve in response to a command signal for opening the intake valve from a predetermined characteristic is detected, and at least one of parameters used for controlling operation of the internal combustion engine is corrected so as to reduce a change in an intake air charging state in which the internal combustion engine is charged with the intake air. A valve closing timing of the intake valve or a valve closing timing of the exhaust valve that cooperates with the intake valve may be used as parameters to be corrected.
Abstract:
An electromagnetic brake cooling structure of a phase variable device having an electromagnetic brake means (40) and varying the phase of a camshaft, wherein engine oil in an oil sump (74) on the radial inner side of a clutch case (60) is led to the relative sliding surfaces of a friction material (66) and a rotary drum (44) through a notch (61a) provided in the clutch case (60) at the front edge part of the inner peripheral wall of the clutch case (60), a notch (61b) for leading oil to the front edge part of the clutch case outer peripheral wall (60b), the oil on the relative sliding surfaces of the friction material (66) and the rotary drum (44) is discharged positively to the outside, and the circulation of the cooling oil is activated to increase the cooling effect of the sliding surface of the friction material (66).
Abstract:
In order to control an actuator, the following steps are carried out in the given sequence when an armature plate is moved from a position in which it is resting against a contact surface to a position in which it is resting against a contact surface of an electromagnet. A predetermined amount of electric energy is supplied to the coil. The coil is directed into an operating state of the freewheel until a first condition is fulfilled. A predetermined second amount of electric energy is supplied to the coil before the armature plate is moved to a position in which it rests against the contact surface of the electromagnet. The coil is directed into an operating state of the freewheel until a second condition is fulfilled whose fulfillment indicates that the armature plate (116) is resting against the contact surface of the electromagnet.
Abstract:
An internal combustion engine comprises a plurality of cylinders to which electromechanically actuated gas exchange valves are assigned. After the actuation of at least one gas exchange valve (2, 3) of a cylinder (1) has been interrupted, said gas exchange valve is operated at first with a decreased load and with adapted control parameters after the same resumes actuation. A reliable functioning of the electromechanically actuated gas exchange valves (2, 3) is guaranteed in this manner after the actuation of at least one gas exchange valve (2, 3) has been interrupted.
Abstract:
The volume of intake air is controlled for each cylinder to make the torque generated by each cylinder controllable, ultra-lean-burn operation is possible, exhaust gas is cleaned, and the power output of the engine is increased. Specifically, each branch pipe or each air intake port is provided with an air volume control valve whose opening/closing is controlled according to the degree to which the accelerator is operated. This air volume control valve may be either a throttle valve provided for each branch pipe or a variable intake valve for opening/closing the air intake port.
Abstract:
A control device for controlling a solenoid driving valve functioning as an intake valve or an exhaust valve of an internal combustion engine and controlling an electromagnetic force required to open or close a valve disc according to a pressure acting on the valve disc. Specifically, a control device for a solenoid driving valve (78) for opening or closing a valve disc (40) by a cooperation between resilient forces of an upper spring (104) and a lower spring (106) and electromagnetic forces of an upper coil (98) and a lower coil (100), wherein a pressure acting on the valve disc (40) is detected directly or indirectly. A magnitude of an electromagnetic force for energizing the valve disc (40), when the valve disc is displaced from one of a valve open position and a valve close position to the other position, toward the other position is controlled according to a pressure acting on the valve disc.
Abstract:
A valve actuator to open and close the intake and exhaust valves of an engine utilizing the electromagnetic force generated by an electromagnet. A reciprocally moving permanent magnet (4) is coupled to an intake or exhaust valve (7), a first electromagnet (3) is provided to be opposed to one end in the reciprocating direction of the moving permanent magnet (4), a second electromagnet (5) is provided to be opposed to the other end, and the intake or exhaust valve (7) is opened and closed by the electromagnetic attractive and repelling forces that act among the moving permanent magnet (4), the first electromagnet (3) and the second electromagnet (5). The force for opening and closing the intake or exhaust valve (7) can be changed by controlling the condition of flowing currents to the first electromagnet (3) and to the second electromagnet (5). Therefore, the timings are controlled to open and close the intake or exhaust valve (7) depending upon the operation condition of the engine (1).
Abstract:
A valve actuator to open and close the intake and exhaust valves of an engine utilizing the electromagnetic force generated by an electromagnet. A reciprocally moving magnetic pole (6) is coupled to an intake or exhaust valve (9), an upper fixed magnetic pole (3a) is provided to be opposed to an end in the reciprocating direction of the moving magnetic pole (6), an intermediate fixed magnetic pole (3b) is provided to be opposed to one end of the moving magnetic pole (6) and to the upper fixed magnetic pole (3a), and a first tip-fixed magnetic pole (3c) is provided to be opposed to the other end of the moving magnetic pole (6). The intake or exhaust valve (9) is opened by the repelling force that acts between the upper fixed magnetic pole (3a) and one end of the moving magnetic pole (6). Being contiguous to the upper fixed magnetic pole (3a), furthermore, a second tip-fixed magnetic pole (3d) is provided to be opposed to the other end of the moving magnetic pole (6), and the intake or exhaust valve (9) is closed by the attracting force acting between the upper fixed magnetic pole (3a) and one end of the moving magnetic pole (6) that results from the magnetic flux passing through the second tip-fixed magnetic pole (3d). By changing the times for exciting the magnetic poles, therefore, the timings can be controlled to open and close the intake or exhaust valve (9).