Variable voltage rectifier of diesel engine

Abstract

The invention discloses a variable voltage rectifier of a diesel engine. The variable voltage rectifier comprises a switching power supply circuit, a bypass power supply circuit and a bypass control circuit, wherein the switching power supply switch is used for outputting voltage output by a charge coil after variable voltage rectifying; the bypass power supply circuit is used for outputting the voltage output by the charge coil after rectifying smoothing; and the bypass control circuit is used for detecting the output voltage of the bypass power supply circuit and comparing the detected output voltage with a set value, so that the bypass power supply circuit is disconnected. The variable voltage rectifier is large in input voltage range and small in output voltage ripple, and when the input voltage is lower than a set output voltage, the voltage lower than the set value can be directly output, so that the problem that the diesel engine cannot be started under the condition of without a storage battery when being started or the diesel engine cannot be automatically protected after being started is effectively solved, the charging quality of the storage battery is improved, and the service life of the storage battery is prolonged.

Description

technical field [0001] The invention relates to the field of diesel engines, in particular to a pressure regulating rectifier for a diesel engine. Background technique [0002] Existing small air-cooled diesel engines mainly use a mechanical fuel injection pump to cut off the fuel and stop the flame. The main methods of fuel cutoff are: ①The throttle combination controls the fuel injection pump, ②The fuel injection pump has its own solenoid valve switch. [0003] When the fuel injection pump comes with a solenoid valve switch, the diesel engine must be equipped with a battery to turn on the solenoid valve switch to start. The disadvantage is that there must be a battery when starting, or manually open the solenoid valve switch mechanically to start, because manual use mechanical This is a mandatory action. If there is no artificial reset action, the switch will always be forced to open, the solenoid valve switch will lose its function, the operation is complicated, and the a...

AI Technical Summary

Problems solved by technology

[0003] When the fuel injection pump has its own electromagnetic valve switch state, the diesel engine must be equipped with a battery to turn on the solenoid valve switch to start. The disadvantage is that there must be a battery when starting, or manually open the solenoid valve switch mechanically to start, because manual use mechanical This is a mandatory action. If there is no artificial reset action, the switch will always be forced to open, and the solenoid valve switch will lose its function. The operation is complicated, and the automatic protection function cannot be realized in normal work.

[0004] The existing voltage regulating rectifier has a small input voltage range, a large output voltage ripple, and a large current impact when charging the battery, which will shorten the life of the battery

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