Rotating speed voltage transformation type power supply device for hot fire head of two-stroke gasoline engine

Abstract

The invention discloses a rotating speed voltage transformation type power supply device for a hot fire head of a two-stroke gasoline engine. The rotating speed voltage transformation type power supply device comprises a power supply unit, an adjusting circuit unit, a rectifying circuit unit and a power supply output interface J5; the power supply unit is respectively connected with the adjustingcircuit unit and the rectifying circuit unit, and the adjusting circuit unit outputs a power supply to the rectifying circuit unit; the output end of the rectifying circuit unit is connected with a first pin of the power supply output interface J5, and a second pin of the power supply output interface J5 is grounded, so that the voltage supplied to the hot fire head when the engine runs at a low speed is high voltage; and when the engine runs at a high speed, the voltage required to be supplied to the hot fire head is properly reduced, so that a provided ignition temperature threshold value isreduced to reach an ignition point of an oil-gas mixture by utilizing gas compression and gasoline combustion waste heat in an air cylinder. Therefore, the effects of automatically controlling the voltage, the ignition temperature and the like are achieved, power consumption of a battery carried by a model airplane is effectively reduced, the endurance time is prolonged, and the use stability isimproved.

Description

technical field [0001] The invention relates to the technical field of model airplanes, in particular to a speed-changing voltage supply for a two-stroke gasoline engine glow plug. Background technique [0002] The two-stroke model airplane gasoline engine is a special engine that provides sufficient power for large and medium-sized model airplanes. It provides power to the crankshaft through the movement of the piston in the cylinder, and then drives the propeller shaft and propeller to rotate, generating forward power and driving the model airplane to operate. The oil-air mixture sucked into the cylinder through the carburetor is compressed by the piston, the temperature and pressure increase, and after being ignited, it burns rapidly, expands in volume, and presses down the piston to complete a stroke. Among them, the most commonly used ignition device inserted into the cylinder on the market is a 6-12V spark plug, which ignites the fuel mixture by generating a high-tempe...

AI Technical Summary

Problems solved by technology

[0003] There are following disadvantages about using the glow plug as a two-stroke model aircraft gasoline engine device in the prior art: the voltage supplied to the plug is constant, that is, the voltage supplied to the plug remains constant from the start of the engine operation to the power supply of the plug being turned off, so that the voltage of the plug remains constant. The heating wire also maintains a constant high temperature during this time to ignite the fuel-air mixture

However, in reality, when the engine is running at high speed, the cylinder itself has a high temperature, plus the high temperature generated by the compressed oil-air mixture, the heat energy provided by the two greatly reduces the energy required for ignition.

In this case, the constant voltage provided to the glow plug will greatly reduce the battery life of the power supply, and accelerate the loss of the glow plug, which not only consumes a lot of energy, but also limits the battery life of the model, and greatly shortens the service life of the device. lower sex

Images