摘要:
Since a factor affecting an individual difference learning result is reduced or eliminated regardless of a valve body behavior, it is possible to highly accurately detect an individual difference of a fuel injector caused by the valve body behavior and to reliably detect the individual difference even when the fuel injector is replaced. When a valve opening/closing timing of the fuel injector is learned by a learning unit, a unit of interrupting the learning if a predetermined condition is established, a unit of prohibiting the learning of the valve closing timing using the learning unit if a predetermined condition is established, or a unit of prohibiting the learning of the valve opening/closing timing of the fuel injector using the learning unit if a fuel pressure of a common rail supplying a fuel to the plurality of fuel injectors changes by a predetermined value or more within a predetermined time is provided.
摘要:
[Problem] Provided is a multi-layer piezoelectric element in which extension of a crack from an end face thereof is suppressed to improve the durability, and an injection device and a fuel injection system using the same. [Solution] A multi-layer piezoelectric element (1) includes a columnar stacked body (5) including an active portion (2a) including piezoelectric layers (21) and internal electrode layers (3a, 3b) alternately laminated, and inactive portions (2b) including piezoelectric layers (22) laminated, the inactibve portions arranged at both ends in a stacked direction of the active portion (2a); and a pair of external electrodes (4a, 4b) arranged on side faces of the columnar stacked body (5), the pair of external electrodes electrically connected to the internal electrode layers (3a, 3b) alternately. In at least one interlayer portion of the inactive portions (2b), there are metal particles (12) having a particle size smaller than that of piezoelectric ceramic particles forming the piezoelectric layers (22) of the inactive portions (2b), and the metal particles are scattered in a range including a region in which the internal electrode layers (3a, 3b) overlap each other when viewed in the stacked direction of the columnar stacked body (5).
摘要:
Die Erfindung betrifft ein Verfahren zum Einspritzen von Brennstoff in den Brennraum (43) eines Zylinders (44) einer langsamlaufenden 2-Takt-Hubkolbenbrennkraftmaschine der Dieselbauart, wobei mindestens zwei Einspritzdüsen (1a,1b) vorgesehen sind, derart, dass die Einspritzdüsen (1a,1b) in variierender Reihenfolge geöffnet werden.
摘要:
A high pressure fuel system (10) includes a combination bypass and safety pressure release valve (24) across the high pressure fuel pump (22). The combination valve (24) allows the feed pump to directly provide fuel to the system before the high pressure pump reaches full output pressure. The valve (80) also releases overpressure in the system when the high pressure pump is deadheaded. The combination valve includes a check ball (88) which allows fuel to flow from its input to its output when the pressure is greater at its input than at its output.
摘要:
A common-rail fuel injection system (1) for an engine (2) includes a fuel injection device for injecting high pressure fuel from a common rail (4) into the engine (2). A pumping chamber is connected to the common rail (4). A fuel feed device serves to feed fuel to the pumping chamber. A plunger moves upward and downward in accordance with rotation of an output shaft of the engine (2). The plunger defines a part of the pumping chamber. A relief valve serves to selectively return fuel from the pumping chamber to a low pressure side via a fuel return passage. The relief valve is urged toward its closed position by a pressure of the fuel in the pumping chamber. A valve closing device serves to close the relief valve. A fuel pumping control device (6) serves to drive and control the valve closing device at a given timing to close the relief valve, thereby enabling a pressure in the pumping chamber to increase in accordance with upward movement of the plunger and pumping a given amount of fuel from the pumping chamber to the common rail (4). An engine speed detecting device (7) serves to detect a rotational speed of the output shaft of the engine (2). In cases where an engine rotational speed detected by the engine speed detecting means (7) is equal to or higher than a predetermined reference speed, a fuel feed suspending device serves to suspend fuel feed to the pumping chamber by the fuel feed means.
摘要:
A variable-discharge high pressure pump (10) for pressure-feeding fuel to a common rail (6) for use in a diesel engine (1). The pump has a plunger (18), a plunger chamber (19), a cam (17) for reciprocatively moving the plunger; an opening-out type electromagnetic valve (15) capable of opening and closing one end of the plunger chamber, a fuel reservoir (22), a check valve (23) communicating with the plunger chamber, and an inlet pipe (14) for supplying fuel to the fuel reservoir. Both the introduction of the fuel into the plunger chamber and the return of the fuel from the plunger chamber to the fuel reservoir are effected through the electromagnetic valve.
摘要:
In view of the foregoing issues, an object of the present invention is to provide a vehicle control device that reduces the constraints of heat generation and charging time of a booster circuit, and decreases favorably the fuel consumption and exhaust emission of an engine. A vehicle control device installed in a vehicle, the device includes: a battery; a high-voltage battery that has a voltage higher than a voltage of the battery; and a fuel injection device that injects fuel into an internal combustion engine, wherein the vehicle control device includes a control unit that determines whether to supply a drive current to the fuel injection device by the battery or supply a drive current to the fuel injection device by the high-voltage battery, and controls the fuel injection device.
摘要:
A control device for an internal combustion engine is provided which can stabilize behavior when a fuel injection valve is opened, and reduce a variation in the amount of fuel injection of the fuel injection valve. A control device (200) for an internal combustion engine includes high voltage difference detection means (404) for obtaining a difference between a predetermined reference voltage (403) and a real high voltage detected by a high voltage detection means (402), drive current difference storage means (406) for storing in advance the amount of device difference variation of a real drive current detected by drive current detection means (408), and drive control value correction means (409) for correcting at least one of a target value of a drive current to a fuel injection valve (105) and a target value of a drive time, on the basis of at least one result of the high voltage difference detection means and the drive current difference storage means, and corrects a target control value of the fuel injection valve on the basis of at least one detection result of the variation of the detected high voltage and the variation of the current for driving the fuel injection valve.