How does an internal combustion engine start, how does an internal combustion engine work

Internal combustion engines require an internal combustion engine starter to start.

The internal combustion engine starter is the device required for the transition of the internal combustion engine from stationary to self-running. The internal combustion engine itself cannot start on its own, and must rotate the crankshaft by external force.

It is not until the crankshaft reaches the speed required for the cylinders of the internal combustion engine to start igniting that the internal combustion engine can maintain stable operation by the work generated by itself.

In addition to the power source that supplies the starting energy, the starting device sometimes includes auxiliary devices that make the internal combustion engine easy to turn and ignite.

The measures to make the internal combustion engine easy to catch fire are: adding an intake preheater or a preheating plug to the intake pipe; The glow plug is installed in the vortex chamber or pre-combustion chamber of the diesel engine; and injection of starter fluid into the intake pipe. In addition, a starting accelerator can be installed on a single magneto so that it can be reliably ignited at lower starting speeds.

Introduction to the types of internal combustion engine starting:

Starting power source: Starting power is divided into human starting, motor starting, and gasoline engine according to the way of providing starting energy.

Starting and compressed air starting.

Manpower start: Commonly used methods such as manual and foot pedaling. Human starting is to turn the crankshaft directly by a person, or indirectly rotate the crankshaft through a simple mechanism to make the internal combustion engine start.

The manpower starting mechanism is simple and not affected by environmental conditions, but the energy is small and the labor intensity is large, and it is generally only suitable for small internal combustion engines (below 15 22 kilowatts) or as a backup method.

Motor starting: The starting gear on the motor shaft is meshed with the gear ring on the flywheel, so that the motor drives the crankshaft to rotate, thereby starting the internal combustion engine. The beginning and end of the starting are controlled by the control mechanism and the clutch mechanism to control the meshing and disengagement of the starting gear and the flywheel ring gear.

There is a starting system to complete, which is divided into electric start and gas start. Most of them are driven by external batteries to start the starter, only the high-power is gas start, provided that there is high-pressure gas.

How does the widely used internal combustion engine work? Look at it in slow motion.

The internal combustion engine works by allowing fuel to burn inside the machine to generate heat and transfer mechanical energy to the outside world.

The internal combustion engine is a power conversion system, which is a heat engine that causes a chemical reaction (combustion) between fuel and air inside the system, and converts the chemical energy (heat energy) released by the reaction into mechanical energy.

Internal combustion engine working process

1. Suction stroke, the piston goes down to form a difference between the pressure in the cylinder and the atmospheric pressure, which is commonly known as the vacuum degree, and the air outside the machine enters the cylinder due to the existence of the vacuum degree.

When the piston descends to the final position, the intake valve is closed, and the suction stroke is completed. In the operation of the machine, due to the relationship of speed, the air pressure in the cylinder is greater than the atmospheric pressure when the suction stroke is completed, and a delay time for the intake valve closure is set in the design to increase the air intake.

2. Compression stroke, after the completion of the suction stroke, the piston upward compressed air reaches a certain temperature to make the fuel burn, at this time there are two situations, one is the ignition given by the outside world, and the other is compressed to a certain time to make it spontaneously combusted.

3. Do the power stroke, compress the air burned after the piston goes down, so as to convert the heat energy into mechanical energy, which is realized through the connecting rod piston group and the crankshaft, under the action of high temperature and high pressure gas, the piston is pushed down through the connecting rod to make the circumference of the circular motion.

This circular motion is the mechanical energy that people need, and its energy is output to the equipment connected to the crankshaft, and part of it is converted into potential energy and stored in the flywheel connected to the crankshaft, and this potential energy is released in the form of flywheel inertia rotation to provide energy for the three strokes of the internal combustion engine: suction, compression, and exhaust.

4. Exhaust stroke, driven by the flywheel inertia, the piston will go up to discharge the combustion exhaust gas from the open exhaust valve, when the piston goes to the end position, the entire internal combustion engine work cycle is completed, and a new round of work cycle will start under the action of flywheel inertia.

The four strokes of an internal combustion engine are as follows:

1) Suction stroke: the intake valve opens, the exhaust valve closes, the piston moves downward, and the mixture of gasoline and air enters the cylinder;

2) Compression stroke: both the intake and exhaust valves are closed, the piston moves upwards, and the fuel mixture is compressed;

3) Do the power stroke: At the end of the compression stroke, the spark plug produces an electric spark, which makes the fuel burn violently and produces a high-temperature and high-pressure gas. The high-temperature and high-pressure gas pushes the piston to move downward, drives the crankshaft to rotate, and does work externally;

4) Exhaust stroke: the intake valve is closed, the exhaust valve is opened, and the piston moves upwards to start the exhaust gas out of the cylinder.

How the internal combustion engine works:

The working process of a four-stroke internal combustion engine is composed of four strokes: suction, compression, work, and exhaust. The four strokes are a working cycle, in a working cycle, the piston reciprocates twice, the crankshaft rotates for two weeks, and in the four strokes, only the power stroke Shoushan Gas does the work externally, and the other three strokes are completed by the inertia of the flywheel.

<> How does an internal combustion engine work? For those who don't know, let's take a look at today's sharing!

The four strokes of an internal combustion engine include an aspiration stroke, a compression stroke, a power stroke, and an exhaust stroke. A four-stroke internal combustion engine completes a duty cycle in four working strokes.