How turbine engines work.

In fact, it is very simple, the higher the engine speed, the more exhaust gases are discharged, until this amount reaches the level of pushing the turbine to work, for example, the engine speed of Bora can push the turbine to work when it reaches about 2000.

The exhaust gas pushes a turbofan to rotate at high speed (up to more than 20,000 revolutions), and this fan mechanically transmits power to the fan on the other intake side to rotate at high speed, transmitting air pressure to the air intake.

The intake pressure increases, the air is pressurized, the amount of air entering the engine also increases, and the engine increases the amount of fuel injected according to the proportion, and the power increases.

Speaking of turbines, you can't know about turbo lag.

Generally speaking, turbo lag mostly refers to the time when the turbine does not work before 2000 rpm, but in fact, it mainly refers to the power of the turbine can not respond quickly with the throttle. For example, Bora releases the throttle at 4000 rpm, the engine stops injecting, and there is no exhaust gas, at this time the turbo is not working, and the accelerator is accelerated again, and the turbo still needs a time to turn up. i.e. turbo lag.

I'm dizzy, you're talking about the gas turbine of the aircraft, not the turbo charge.

The core engine of a turbine engine is divided into a compressor, a combustion chamber, and a gas turbine.

The compressor becomes thicker as the shaft goes deeper, the diameter of the engine shell becomes thinner, and at the same time, the inhaled gas is forced to be inhaled and compressed through the rotation of the blades, and the combustion temperature and pressure increase when it enters the combustion chamber, and the special shape of the combustion chamber makes the pressure point to the rear turbine to push the turbine to run, and the turbine drives the compressor to maintain the engine work, and the gas that is exploited for a time continues to be sprayed back to provide power.

There are also turbofan turboprop turboshaft engines, except that the gas that spews out does not propel the plane, but drives another turbine to exploit the energy and propel other things such as fans or propellers.

The two upstairs are talking about car turbocharging, not turbojet engines.

How a turbocharged engine works.

Turbocharging is a technology that uses the exhaust gases generated by the operation of an internal combustion engine to drive an air compressor. The main function of turbocharging is to increase the air intake of the engine, thereby increasing the power and torque of the engine and making the car more powerful.

The four-cylinder starts the digging machine, and the ignition is ignited in the order of the first, third, fourth, and second cycles.

1. The ignition sequence of the engine is .

2. That is, when the 1st cylinder is in the "work", the 3rd cylinder is in the "compression" state, the 4th cylinder is in the "intake" state, and the 2nd cylinder is in the "exhaust" state.

3. According to the ignition sequence, distinguish from the intake and exhaust valves.

1) The intake and exhaust valves of the 1st cylinder are closed (the work is done, and the piston is in the top dead center position).

2) The exhaust valve of the 3-cylinder is closed, and the intake valve is "just" closed (compression starts, and the piston is in the bottom dead center position).

3) The exhaust valve of the 4th cylinder is "just" closed, and the intake valve is "just" opened, (the beginning of the intake can be understood as the beginning of the exhaust at the end of the row, and the piston is in the top dead center loss and position of the piston).

A four-cylinder engine, also known as a four-cylinder engine, is a machine capable of transforming one form of energy into another, more useful energy.

It is usually the conversion of chemical energy into mechanical energy. Sometimes an engine is applied to both a power generator or an entire machine including a power unit, such as a gasoline engine or an aero engine. The main part of the motor is the cylinder, which is the power source of the whole car.

Engine principle: suction-compression-work-exhaust.

The turbocharger is mainly composed of two parts, a turbine and a compressor, which are connected by a transmission shaft.

The air intake of the turbine is connected to the engine exhaust manifold, and the exhaust port is connected to the exhaust pipe; The inlet port of the compressor is connected to the intake pipe, and the exhaust port is connected to the intake manifold.

How exactly is supercharging achieved? The exhaust gas discharged from the engine mainly impacts the turbine at high speed, thereby driving the coaxial compressor to rotate at high speed, and forcibly pressurizes the pressurized air to the cylinder.

Turbocharging is mainly to use the energy of the engine exhaust gas to drive the compressor to achieve the intake air boosting, the whole process basically does not consume the power of the engine, has a good acceleration continuity, but at low speed the turbine can not intervene in time, with a certain lag.

In view of the problem of low intake efficiency of the natural intake (NA) engine in the high rpm area, starting from the most basic key point, that is, to find a way to increase the air pressure in the intake manifold to overcome the valve interference resistance, although the size of the intake manifold, valve, and camshaft remains the same, but due to the result of the increase in intake pressure, the air that can be squeezed into the combustion chamber during each valve opening time increases, so the amount of fuel injection can also be relatively increased, so that the working energy of the engine is more powerful than before the supercharging. This is the basic principle of charge.

1. Turbocharging, in fact, its realization is achieved through a turbocharger. A turbocharger is colloquially understood as an air compressor, which compresses air to increase the air intake.

2. The turbocharger uses the inertia impulse of the exhaust gas discharged by the engine to push the turbine in the turbine room, and the turbine drives the coaxial impeller, and the impeller presses the air sent by the air filter pipe to pressurize it into the cylinder.

3. When the engine speed increases (when accelerating), the exhaust gas discharge speed and the turbine speed also increase synchronously, the impeller compresses more air into the cylinder, and the pressure and density of the air increase to burn more fuel, increase the amount of fuel and adjust the speed of the engine, so as to increase the output power of the engine.

4. Under the existing technical conditions, the turbocharger is a mechanical device that can increase the "output power" of the engine under the condition of "constant working efficiency". Generally, the engine can increase the output power by about 10% to 40%. It can be inferred that if the engine of the PassATB5 is added, the "output power" after adding a turbocharger should be equivalent to the output power of the displacement engine.

In addition to the turbocharger, the turbocharging system also includes intake bypass valves, exhaust bypass valves, and exhaust bypass valve controls.

Clause. First, the working principle of the bypass valve turbocharger:

At high speed and high load, the turbocharger bypass valve opens, and part of the exhaust gas directly enters the exhaust pipe through the bypass valve, releasing a part of the exhaust gas, and the turbine speed decreases, so as to control the pressure of the booster. There are two control methods of bypass valve turbocharger, one is mechanical (vacuum) control, which is usually used in truck diesel engines; The other is electronic control, which is usually used in cars.

Clause. Second, the structure and working principle of mechanical control bypass valve.

The mechanical control bypass valve is mainly composed of control air chamber, tie rod, bypass valve, etc. In a bypass valve actuator, pressurized gas is passed to the left side of the diaphragm.

1. When the engine is running at low speed, the outlet pressure of the compressor is low, the bypass valve is closed under the action of the return spring, and the exhaust gas discharged from the engine passes through the turbine end of the supercharger, thereby increasing the speed of the turbine, which can produce a larger intake booster pressure, increase the air intake, and improve the low-speed performance of the engine.

2. When the engine is running at high speed, the burst pressure after the supercharger exceeds the specified value, and the booster gas jacks up the diaphragm in the exhaust actuator, drives the bypass valve lever to move, and opens the exhaust bypass valve, so that a part of the exhaust gas does not pass through the turbine end of the supercharger, and directly discharges the atmosphere from the exhaust side channel, so that the turbine inlet flow is reduced, the pressure is reduced, the speed of the supercharger is reduced, and the pressure of the supercharger is reduced.

Clause. 3. The structure and working principle of the electronically controlled bypass valve.

The opening and closing of the exhaust bypass valve is controlled by a boost pressure control solenoid valve controlled by the ECU. The ECU monitors the operating conditions of the engine, compares it with the preset parameters inside, and controls the opening time of the solenoid valve accordingly, so as to change the opening of the exhaust bypass valve, control the exhaust bypass flux, and accurately adjust the boost pressure.

The work of the engine is a principle of world reputation or.