Series resonance igniting circuit of lean burn engine and working and control methods thereof

Abstract

The invention discloses a series resonance igniting circuit of a lean burn engine. The circuit comprises a power supply and a high energy igniter. An output end of the power supply outputs an alternating current with output frequency of f; the high energy igniter comprises a matching transformer, an igniting inductor, a serial capacitor, an igniting electrode and a grounding electrode. The primaryside of the matching transformer is in time-sharing connection to two output ends of the power supply, one end of the secondary side of the matching transformer is connected to one end of the igniting inductor, the other end of the igniting inductor is connected to one end of the serial capacitor, and the other end of the serial capacitor is connected to the other end of the matching transformer;an ignition electrode is connected to public ends of the igniting inductor and the serial capacitor, the grounding electrode is connected to public ends of the serial capacitor and the matching transformer, and in the circuit, f=f0 is acquired at ignition. According to the igniting circuit and the igniting method and control method thereof, lean gas can be ignited precisely and efficiently by means of a resonance characteristic of an igniting resonance structure, so that normal operation of the lean burn engine is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of engine ignition, in particular to a series resonance ignition circuit of a lean combustion engine. Background technique [0002] An engine is a machine that can convert other forms of energy into mechanical energy, generally including internal combustion engines, external combustion engines, jet engines, electric motors, etc. Today's power vehicles often use internal combustion engines as their power core to provide speed and torque for the vehicle to drive it forward. [0003] The internal combustion engine is a kind of power machinery, which uses the heat energy released by the combustion of fuel inside the machine, and converts the heat energy directly into power, and then drives the external load. Common internal combustion engines usually run on gasoline or diesel. The internal combustion engine realizes the conversion between the internal energy of the fuel and the mechanical energy of the load. U...

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Problems solved by technology

However, the patent application document does not disclose the specific circuit structure of the spark plug system. After the pulse signal enters the spark plug system, how to trigger the spark plug system to generate pulse high voltage; and after the pulse high voltage is applied to the spark plug, how does the spark plug generate arc breakdown The rarefied gas produces a plasmoid, which cannot be clearly known from the patent document

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