Diesel nozzle simulator with electric energy feedback function and its working method
A technology of electric energy feedback and emulator, which is applied in electrical control, fuel injection control, machine/engine, etc., can solve the problems of burning emulator, inductor heating, etc., and achieve the effect of saving electric energy, reducing electric energy consumption, and improving versatility
Inactive Publication Date: 2017-10-20
SOUTH CHINA UNIV OF TECH
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Problems solved by technology
Obviously, the diesel nozzle can be replaced and simulated with an inductance similar to the inductance value of the diesel nozzle drive coil, but this is not feasible in practice, because the output drive current of the diesel ECU is very large. The electric energy output by the ECU is consumed in vain on this inductance, which causes severe heating of the inductance and eventually burns out the emulator
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[0042] Such as figure 1 Shown is the parallel active blending electronic control system of diesel / natural gas dual fuel engine. When working in pure diesel mode, the diesel injector is controlled by the original diesel ECU; when working in dual fuel blending combustion mode, The diesel nozzle is controlled by the blending ECU. In order to realize the selection of combustion mode and reduce the electromagnetic disturbance to the blending ECU, the blending electric control system has a combustion mode switching control board independent of the diesel ECU and the blending ECU. Such as figure 2 As shown, the diesel nozzle simulator is installed on the combustion mode switching control board, and the switch on the switching board is responsible for switching whether the output of the diesel ECU is connected to the diesel nozzle or to the simulator. When in blending combustion mode, what the diesel ECU actually drives is the diesel injector emulator.
[0043] Such as image 3 A...
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The invention discloses a diesel nozzle emulator with an electric energy feedback function and a working method thereof, comprising a pulse transformer, a rectifier circuit, a DC / DC boost circuit, an inductance feedback circuit and a controller; the primary side of the pulse transformer is connected in series to the nozzle driver of the diesel ECU In the loop, the secondary side of the pulse transformer is connected to the input end of the rectification circuit; the output end of the rectification circuit is connected to the input end of the inductance feedback circuit after passing through the DC / DC boost circuit, and the output end of the inductance feedback circuit is connected to the battery; The boost circuit is connected with the controller, and the working state of the boost circuit is controlled by the controller; the output terminal of the rectifier circuit, the output terminal of the boost circuit and the positive pole of the battery are respectively connected with the controller through the signal sampling circuit, and the voltage value is measured through the controller. The diesel nozzle emulator of the present invention feeds back the driving electric energy of the diesel ECU it receives to the battery, which not only reduces the electric energy consumption of the electronic control system of the dual-fuel engine, but also saves precious electric energy of the automobile battery.
Description
technical field [0001] The invention relates to the field of engine electronic control, in particular to a diesel nozzle emulator with electric energy feedback function and its working method. Background technique [0002] Diesel nozzle is a key component for controlling diesel injection in high-pressure common rail diesel engine. Diesel nozzle is essentially a special solenoid valve. The equivalent circuit of diesel nozzle can be simplified as a circuit in series with inductor and resistor, and the inductance value is about several millihenries. , the resistance is about a few tenths of an ohm. In the high-pressure common rail diesel engine electronic control system, the diesel nozzle is driven and controlled by the diesel ECU (Electronic Control Unit). In order to achieve fast response, the diesel nozzle adopts peak-constant current control with two voltage stages. In the peak stage, the diesel ECU applies a voltage higher than the battery voltage V to the nozzle Batter...
Claims
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IPC IPC(8): F02D41/20F02D41/26
Inventor 肖兵何红芬
Owner SOUTH CHINA UNIV OF TECH