High-energy discharge ignition device and control method thereof

Abstract

The invention provides a high-energy discharge ignition device and a control method thereof. Independent charge-discharge control can be conducted on each ignition coil through a main control circuit,and through switching, the high-energy discharge ignition device can work on a double-coil parallel output mode and a four-coil serial-parallel output mode correspondingly with an MOS pipe. During turn-off operation of Q1 and Q2 of the MOS pipe and turn-on operation of Q3 and Q4, the ignition coils L1 and L2 discharge to the outside in a parallel form; and during turn-on operation of the Q1 and Q2 of the MOS pipe and turn-off operation of the Q3 and Q4, the ignition coils L1 and L3 are in series connection, the L2 and L4 are in series connection, discharge ability is improved, the two sets ofseries ignition coils are in parallel connection to discharge to the outside, and various discharge form output of higher energy and higher breakdown ability is achieved. Each ignition coil is independently controlled, charging can be conducted while the coils are in series connection, the coils are combined with a boosted circuit to supply power to a primary coil, fast coil charging is achieved,energy storage time is not increased on the basis that discharge ability is improved through the series coils, and high-frequency continuous discharge and other strategies are convenient to achieve.

Description

technical field [0001] The invention relates to the technical field of ignition engines, in particular to a high-energy discharge ignition device and a control method thereof, in particular to a high-energy ignition coil that satisfies the engine's high dilution ratio and high boost combustion. Background technique [0002] High dilution ratio combustion is the key technical direction of future engines. However, as the dilution ratio increases, the combustion instability will further increase. In order to enhance the high dilution ratio combustion, the turbulence in the combustion chamber needs to be enhanced, which also brings challenges to successful ignition. While increasing the dilution ratio, the intake pressure needs to be increased to meet the power output requirements, and for discharge ignition, the high back pressure requires a higher breakdown voltage, which further brings challenges to the ignition device. Advanced ignition technology is a method to solve the c...

AI Technical Summary

Problems solved by technology

However, because the patent only adopts the coil parallel mode, it cannot increase the discharge breakdown capacity. When encountering a high-pressure engine, it is necessary to replace the large-capacity coil, but the large-capacity coil requires a longer energy storage time; in addition, the device does not With a boost circuit, it is not conducive to high-frequency multiple discharge of the coil

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