Abstract:
The invention relates to a method for evaluating the march of pressure in the combustion chamber of an internal combustion engine, wherein the output signal of at least one cylinder pressure sensor and a crankshaft angle sensor is evaluated. Pressure march characteristics for specific valve control times are obtained by analysing the march of pressure in the combustion chamber via the crankshaft angle. Said characteristics enable the following valve control times to be deduced in relation to the crankshaft angle: "outlet opens", "outlet closes", "inlet opens", "inlet closes".
Abstract:
The invention relates to a method for evaluating the march of pressure in the combustion chamber of an internal combustion engine, wherein the output signal of at least one cylinder pressure sensor and a crankshaft angle sensor is evaluated. Pressure march characteristics for specific valve control times are obtained by analysing the march of pressure in the combustion chamber via the crankshaft angle. Said characteristics enable the following valve control times to be deduced in relation to the crankshaft angle: "outlet opens", "outlet closes", "inlet opens", "inlet closes".
Abstract:
Motion recognition processes are disclosed, in particular for regulating the impact speed of an armature on an electromagnetic actuator with at least one electromagnet having at least one pole face (4) and connected to a controllable power supply, and with an armature (5) connected to a regulating element to be actuated which, when power is supplied to the electromagnet, is moved against the force of a restoring spring (7) in the direction of the pole face of the electromagnet from a first switching position to a second switching position in which it stops against the pole face. At least one sensor (11) detects in a defined air gap zone of the pole face a progressive attenuation of the magnetic field as the armature approaches and generates a corresponding signal.
Abstract:
Ein erfindungsgemäßes Verfahren zum Steuern einer Verbrennungsmaschine mit einer Nockenwelle, deren Phase zu einer Kurbelwelle mittels einer elektrischen Verstelleinrichtung verstellbar ist und einer Steuereinrichtung umfasst die Schritte S1 bis S3, wobei in Schritt S1 eine Stopp-Anforderung von der Steuereinrichtung an die elektrische Verstelleinrichtung ausgegeben wird. Anschließend wird in Schritt S2 eine Stellgröße in Form eines Tastverhältnisses von der elektrischen Verstelleinrichtung ausgegeben, wobei das Tastverhältnis einem Nockenwellenmoment entgegenwirkt. In Schritt S3 wird die Drehrichtung der Nockenwelle überwacht, wobei in Schritt S4 bei einem Erkennen einer Drehrichtungsumkehr der Nockenwelle eine Berechnung einer Intensität dieser Drehrichtungsumkehr durch eine Bestimmung eines Drehzahlgradienten erfolgt. Desweiteren wird in einem Schritt S5 das Tastverhältnis in Abhängigkeit des Drehzahlgradienten derart korrigiert, dass der Einfluss der Drehrichtungsumkehr auf die Position der Nockenwelle kompensiert.
Abstract:
A rocker arm assembly includes an outer arm having a first outer side arm and a second outer side arm, each of the first and second outer side arms having a low lift lobe contacting surface, an inner arm having a high lift lobe contacting surface and disposed between the first and second outer side arms, the inner arm having a first end and a second end operably associated with a lash adjuster and defining a latch bore, and a latch assembly arranged at least partially within the latch bore. The latch assembly is movable between a first configuration and a second configuration. In the first configuration, the latch assembly engages the outer arm such that the outer arm rotates with the inner arm, and in the second configuration, the latch assembly disengages the outer arm such that the outer arm rotates independently from the inner arm.
Abstract:
연속 가변 밸브 타이밍 제어 장치가 개시된다. 이 장치는 상기 흡기 밸브 또는 상기 배기 밸브의 실제 위상 각과 상기 흡기 밸브 또는 배기 밸브의 목표 위상 각을 출력하는 엔진 제어 유닛 및 차량 내의 디지털 통신을 이용하여, 상기 엔진 제어 유닛으로부터 상기 실제 위상 각과 상기 목표 위상 각을 수신하고, 수신한 상기 실제 위상 각과 상기 목표 위상 각 간의 위상 편차를 이용하여 상기 모터의 출력 토크를 조정하기 위한 구동 전류를 생성하는 지능형 모터 컨트롤러를 포함한다.
Abstract:
Vorgeschlagen ist ein Aktuator für einen elektrohydraulischen Gaswechselventiltrieb einer Brennkraftmaschine. Der Aktuator umfasst ein an der Brennkraftmaschine montierbares Aktuatorgehause (17) mit einer Bohrung (18), einen darin hubbeweglich gelagerten Hydraulikkolben (6) zur Betätigung des Gaswechselventils (2) und einen Axialanschlag (19), der im unmontierten Zustand des Aktuatorgehäuses an der Brennkraftmaschine den Kolbenhub aus der Bohrung auf einen Montagehub (T) beschränkt. Dieser soll kleiner als ein maximaler Betriebshub (L) sein, mit dem der Hydraulikkolben das Gaswechselventil betätigt, wobei die Beschränkung des Kolbenhubs auf den Montagehub durch den Axialanschlag lediglich temporär und nach Inbetriebnahme des Aktuators (16) aufgehoben ist.
Abstract:
Die Erfindung betrifft einen Nockenwellenversteller (1) zum Verstellen und Fixieren der relativen Drehwinkellage einer Nockenwelle (8) gegenüber der Kurbelwelle einer Hubkolbenbrennkraftmaschine, mit einem hoch übersetzenden und reibungsarmen Verstellgetriebe (2), dass eine mit der Kurbelwelle verdrehfest verbundene Antriebswelle, eine mit der Nockenwelle (8) verdrehfest verbundene Abtriebswelle und eine mit einer Verstellmotorwelle (10) eines Verstellmotors verbundene Verstellwelle (9) aufweist. Ein kostengünstig zu betreibender Nockenwellenversteller (1) wird dadurch erreicht, dass das Verstellgetriebe (2) und der Verstellmotor (3) als getrennte Einheiten ausgebildet und durch eine drehspielfreie, lösbare Kupplung (4) miteinander verbunden sind.
Abstract:
A control device for an internal combustion engine has means for generating control commands for controlling final control elements in accordance with at least one measured value. The control device also has a communications interface for exchanging messages with a control unit for final control elements. A counter is also provided, the status of said counter being dependent on the pulses of a measuring signal of an incremental crankshaft angle sensor. The control commands contain desired counter statuses for carrying out the control task. A control unit also has a counter whose counter status depends on the pulses of the measuring signal of the incremental crankshaft angle sensor. Means for carrying out the control tasks in accordance with the counter status and the desired counter status are also provided.
Abstract:
The control unit calculates a desired intake-air quantity based on the engine operating conditions, and calculates a threshold limit value that corresponds to a lower limit intake-air quantity above which valve timing control of the intake valve enables the intake-air quantity to be brought closer to the desired intake-air quantity. The control unit calculates a first intake valve timing corresponding to the desired intake-air quantity, and calculates a second intake valve timing substantially corresponding to the threshold limit value. The control units sets a desired valve timing of the intake valve to the second intake valve timing and estimates a desired throttle opening that realizes the desired intake-air quantity by throttle opening control of the throttle valve, when the desired intake-air quantity is below the threshold limit value.