CN201184264Y - A dual-fuel motorcycle engine ignition system - Google Patents

Abstract

The utility model claims a dual-fuel motorcycle engine ignition system, which includes an engine magneto, an igniter, a high-voltage coil and a spark plug. It is provided with a gasoline ignition magnet at the gasoline ignition advance angle position on the rotor of the engine magneto, and a gasoline ignition sensor is arranged on the same circular plane of the stator correspondingly, and a natural gas ignition magnet is arranged at the natural gas ignition advance angle position on the rotor. Steel, the natural gas ignition magnetic steel is arranged on the same circular plane of the corresponding stator, and the signal lines of the gasoline ignition sensor and the natural gas ignition sensor are connected to the igniter through a single-pole double-throw switch. The utility model arranges two magnetic steels and sensors on the magneto to ensure that different ignition advance angles are obtained when different fuels are used, so as to achieve the purpose of fully burning the fuel, reducing pollution, saving energy and improving power.

Description

A dual-fuel motorcycle engine ignition system

technical field

The utility model relates to a motorcycle engine ignition system.

Background technique

At present, the engines of automobiles and three-wheeled motorcycles all have the situation of needing dual fuels, mainly gasoline and natural gas (abbreviated as CNG in the past). Because the octane number of gasoline is different from that of CNG, when the same engine is switched to another fuel, if necessary improvements are not taken, the ignition time will be unreasonable, resulting in incomplete combustion of fuel, engine overheating, power drop, etc. question.

Contents of the invention

The purpose of this utility model is to propose a dual-fuel motorcycle engine ignition system for the shortcomings of the current dual-fuel running motorcycle engine. When using different fuels, different ignition advance angles are used to ensure sufficient combustion of the fuel and reduce Sewage discharge, energy saving and power improvement.

The technical scheme of the utility model is as follows:

A dual-fuel motorcycle engine ignition system includes an engine magneto, an igniter, a high-voltage coil and a spark plug, the sensor signal line of the engine magneto is connected to the igniter, and the igniter is electrically connected to the high-voltage coil and the spark plug. The gasoline ignition advance angle position on the rotor of the magneto is provided with a gasoline ignition magnet, which is correspondingly provided with a gasoline ignition sensor on the same circular plane of the stator; the natural gas ignition advance angle position on the rotor of the magneto of the engine is provided with A natural gas ignition magnet is arranged on the same circular plane of the corresponding stator; the signal lines of the gasoline ignition sensor and the natural gas ignition sensor are connected to the igniter through a single-pole double-throw switch.

We know that the work of the engine is done because the fuel burns in the cylinder and explodes to do work, pushing the piston up and down. The time Δt required for full combustion of various fuels is different. Assume that the time required for full combustion of the gas produced by mixing gasoline with the atmosphere is Δt1, and the time required for full combustion of natural gas (CNG) mixed with the atmosphere is Δt2. Obviously Δt2>Δt1 (regardless of whether the oxygen is sufficient during mixing, and in the same volume). The heat engine theory tells us that Δt is guaranteed by the advance angle θ before the piston moves to the top dead center. It is guaranteed in the design and manufacture of the heat engine that when the engine speed increases, θ is gradually advanced, but it does not take into account the different advance angle θ that needs to be changed for different fuels to fully burn. The ignition signal of the motorcycle engine comes from the magneto. In this scheme, a magnet and a sensor are installed on the basis of the original magneto, that is, two magnets with ignition signals are set, and two sensors are correspondingly installed at the position of the stator. Through the switch, different fuels can obtain different initial ignition signals.

The utility model arranges two magnets and sensors on the magneto of the ignition system to ensure that different ignition advance angles are obtained when different fuels are used, so that the fuel can be fully burned, reducing pollution, saving energy, and improving power. the goal of.

Description of drawings

Fig. 1 is the structural representation of magneto;

Fig. 2 is a structural schematic diagram of the ignition system.

Detailed ways

Below in conjunction with accompanying drawing, structure of the present utility model is described in detail:

This ignition system is made up of engine magneto, igniter 10, high voltage coil 11 and spark plug 12. Wherein the engine magneto is shown in Figure 1, the magneto stator 1 is fixed on the engine cover 5, and the rotor 2 is installed on the rotor shaft 8, driven by it to rotate. Two different circular planes are respectively fixed on the rotor 2 of the magneto, and are respectively arranged at the gasoline ignition advance angle position and the natural gas ignition advance angle position, and a gasoline ignition sensor 7 and a natural gas ignition sensor are correspondingly arranged on the magneto stator 1 6. When the engine was running, the rotor shaft 8 drove the rotor 2 to rotate, and every revolution, the gasoline ignition magnet 4 and the natural gas ignition magnet 3 cut the gasoline ignition sensor 7 and the natural gas ignition sensor 6 once respectively to generate ignition signals respectively. Because the gasoline ignition magnet 4 and the gasoline ignition sensor 7 are on a circular plane, and the natural gas ignition magnet 3 and the natural gas ignition sensor 6 are on another circular plane, every revolution of the magneto, the gasoline ignition sensor 7 and the natural gas ignition sensor 6 are all Only one ignition signal can be generated.

Figure 2 shows the principle of the ignition system, the signal lines of the gasoline ignition sensor 7 and the natural gas ignition sensor 6 are connected to the igniter 10 through a single pole double throw switch 9 . When gasoline is used, the SPDT switch 9 is at the K1 position, the gasoline ignition sensor 7 is connected to the igniter 10, the natural gas ignition sensor 6 is disconnected, the signal generated by the gasoline ignition sensor 7 is sent to the igniter 10, and the high-voltage coil 11 generates ignition Energy, so that the spark plug 12 discharges and ignites. When using natural gas (CNG), the double-throw single-pole switch 9 is at the K2 position, and the natural gas ignition sensor 6 and the igniter 10 are connected, and the natural gas ignition sensor 6 generates an ignition signal to the igniter 10, so that the high-voltage coil 11 generates ignition, and the spark plug 12 Discharge ignition.

In this scheme, the same igniter is used, and the igniter itself increases with the speed without changing the near angle advance. That is, the advance angle of the engine speed at this time is not changed. Only the total advance angle has changed when CNG is used.

In practice, in order to pursue a more perfect ignition advance angle at each speed, two igniters with different near angles can also be used.

Claims (2)

1. An ignition system for a dual-fuel motorcycle engine includes an engine magneto, an igniter, a high-voltage coil and a spark plug, the sensor signal line of the engine magneto is connected to the igniter, and the igniter is electrically connected to the high-voltage coil and the spark plug. The gasoline ignition advance angle position on the rotor of the engine magneto is provided with a gasoline ignition magnet, and correspondingly a gasoline ignition sensor is arranged on the same circular plane of the stator; it is characterized in that: the natural gas ignition sensor on the rotor of the engine magneto A natural gas ignition magnet is arranged at the advance angle position, and a natural gas ignition magnet is arranged on the same circular plane of the corresponding stator; the signal lines of the gasoline ignition sensor and the natural gas ignition sensor are connected to the igniter through a single-pole double-throw switch. 2. The dual-fuel motorcycle engine ignition system according to claim 1, characterized in that: the natural gas ignition magnet and its corresponding natural gas ignition sensor are respectively arranged on two sides of the gasoline ignition magnet and its corresponding gasoline ignition sensor. on different circular planes.

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