摘要:
The invention relates to a method for operating a fuel injector having at least one injection opening controlled by an injector needle (25). Pressure changes during opening and/or closing of the injector needle (25) or a switching valve are determined by means of a sensor (60). The temperature of the fuel injector is determined on the basis of a signal of the sensor (60).
摘要:
An exhaust purification apparatus for an internal combustion engine, which combusts hydrocarbon adsorbed to a catalyst at an appropriate timing while avoiding increase in the number of components and complexity of a structure thereof, is provided. There is provided an exhaust purification apparatus 14 for an internal combustion engine 10 in which a catalyst 15 capable of adsorbing and oxidizing hydrocarbon is provided in an exhaust pipe, the exhaust purification apparatus including temperature detection means 13 for detecting a temperature of the catalyst 15, estimation means 40 for accumulating a time during which the temperature of the catalyst 15 detected by the temperature detection means 13 is equal to or less than a predetermined temperature, and estimating an amount of hydrocarbon adsorbed on the catalyst 15 from the accumulated time, and control means 40 for controlling fuel ejection of the internal combustion engine 10 in a first ejection mode in which the temperature of the catalyst 15 is increased to a temperature where hydrocarbons adsorbed on the catalyst 15 are oxidized, in a case in which the amount of hydrocarbons estimated by the estimation means 40 exceeds a predetermined upper limit.
摘要:
Disclosed is a method for operating a fuel injector comprising at least one injection port controlled by an injector needle, wherein pressure variations when the injector needle is opened and/or closed are determined using a sensor. Said method is characterized in that in order to determine the opening/closing time of the injector needle, a variable characterizing the speed of sound is measured by opening and/or closing a shock wave, and the wave propagation time by which the opening/closing time of the needle or valve is corrected is deduced therefrom.
摘要:
A device for stopping a diesel engine, the device for a common rail diesel engine is provided which can control an engine phase when the engine is stopped so that the engine can be restarted quickly next time. The device includes an engine phase determining means 42 which determines an engine phase based on a crank angle and an angle of a camshaft, an engine stop position determining means 43 which stores a stopping time ST spent from the issuance of an engine stop request to the stop of the engine and obtains an engine phase when the engine is stopped based on the engine phase, resulting when the engine stop is requested, and the stopping time ST, and an at-time-of-stopping injector control means 44 which controls fuel which is injected from the fuel injectors 16 so that the engine phase obtained by the engine stop position determining means 43 when the engine is stopped after the engine stop request is made allows a piston in a specific cylinder to stop at a bottom dead center of a compression stroke.
摘要:
A common rail type fuel injection system provided in an engine with a plurality of cylinders, configured to inject high-pressure fuel stored in a common rail from injectors provided on each of the cylinders under fuel injection control performed by a control unit, and comprising: a plurality of communication lines each of which connects the control unit to a one of the injectors, wherein each of the injectors includes a storage unit configured to store correction information set according to injection characteristics, and a communication unit configured to send the correction information stored in the storage unit to the control unit via a one of the communication lines.
摘要:
The purpose of the present invention is to detect variations between the quantities of fuel injected into cylinders by fuel injection devices and correct the fuel injection quantity variation while minimizing the computational load on a drive device and the level of performance required of a pressure sensor. A drive device for fuel injection devices according to the present invention performs control wherein movable valves are driven so that predetermined quantities of fuel are injected by applying, for the duration of a set energization time, a current that will reach an energization current to solenoids of a plurality of fuel injection devices which open/close fuel flow paths. The drive device is characterized in that the set energization time or energization current is corrected on the basis of a pressure detection value from a pressure sensor that is attached to a fuel supply pipe disposed upstream of the plurality of fuel injection devices.
摘要:
The invention relates to a method for determining a start of injection of an injector (11) of an internal combustion engine (1), comprising the following steps: - time-resolved detecting of an individual storage pressure curve (p, 23) in a measurement interval; - determining a test injection start (TS) with the aid of the individual storage pressure curve (p, 23); - determining a tendency (25) of the individual storage pressure curve (p, 23) in a predetermined test interval (Δί) prior to the test injection start (TS); - correcting the individual storage pressure curve (p, 23) subject to said tendency (25); and - determining a start of injection with the aid of the corrected individual storage pressure curve (27).
摘要:
The invention relates to a method for controlling an internal combustion engine (3), wherein a first engine control device (5) generates at least one control signal in order to actuate at least one function of the internal combustion engine (3). The method is characterized in that a switchover device (9) transmits the at least one control signal of the first engine control device (5) to the internal combustion engine (3) in order to actuate the at least one function of the internal combustion engine (3). The first engine control device (5) continuously or periodically transmits a sign-of-life signal which indicates the functionality of the engine control device to the switchover device (9). The first engine control device (5) does not transmit the sign-of-life signal or transmits the signal incorrectly if a fault occurs which endangers the proper actuation of the at least one function of the internal combustion engine (3) by means of the first engine control device (5). If the sign-of-life signal of the first engine control device (5) is not received or is incorrectly received by the switchover device (9), the switchover device (9) stops transmitting the control signals of the first engine control device (5) to the internal combustion engine (3) and starts transmitting at least one control signal generated by a second engine control device (7), in order to actuate the at least one function of the internal combustion engine (3), to the internal combustion engine (3).