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List of the catalog of this article:

• 1, What signals are transmitted during the engine operation?
• 2. What are the signals commonly used in the electronically controlled engine?
• 3
  、 Common switch signals of automobile engine electronic control system?
• 4, What's wrong with the car engine fault signal light?
• 5, The engine needs to start and ignite normally. What signals does the ECU need to collect?
• 6, What signals does the car engine based on to determine the heavy load condition?

What signals are transmitted during the engine operation?

G signal is a judgment cylinder signal, which is obtained by the camshaft position sensor. The Ne signal is the crankshaft position sensor, whose function is to determine the upper stop point of a cylinder, correct the ignition time and the injection timing. The IGT signal is an ignition signal, and the ECU sends a signal to the ignition coil. IGd is generated by G signal, which is called cylinder identification signal.

Offl gear start switch signal: The computer in a car equipped with an electronically controlled automatic transmission uses this signal to judge. Whether the electronically controlled automatic transmission is in a state of parking, neutral or exercise, with real start and idling control.

The signal generally used by electronically controlled engines is the ignition signal and the fuel injection signal, and the engine can be started. It can maintain the rotation.

What are the signals commonly used on the electronically controlled engine?

The signal generally used by the electronically controlled engine is the ignition signal and the fuel injection signal, and the engine can be started. It can maintain the rotation.

Hello, the switch signals of the electronic engine control system include start signal, air conditioning demand signal, gear switch and parking/idle switch signal, clutch switch signal, brake switch signal and power steering switch signal, etc. These signals are all switching quantities, and there are two types: grounded switches and positive pole switches.

Ignition switch signal (1 point); (2) Start switch signal (1 point); (3) Air conditioning switch signal (1 point); (4) Power supply voltage signal (1 point); (5) Idle safety switch signal (1 point).

What are the commonly used switching signals in the electronic control system of automobile engines?

1. Hello, the switch signals of the electronically controlled engine control system include start signals, air conditioning demand signals, gear switches and parking/idal switch signals, clutch switch signals, brake switch signals and power steering switch signals, etc. These signals are all switching quantities, and there are two types: grounded switches and positive pole switches.

2. Ignition switch signal (1 point); (2) Start switch signal (1 point); (3) Air conditioning switch signal (1 point); (4) Power supply voltage signal (1 point); (5) Idle safety switch signal (1 point).

3. The sensors and switching signals commonly used in the engine fuel injection system are: (1) Air Flow Sensor AFS (AirFlowSensOr) or the intake manifold absolute pressure sensor MAP (ManifoldAbsolutePressureSensor) to detect the intake signal.

4. Execution component: a device controlled by ECU that specifically performs a certain control function. Type and function of sensor air flow meter (MAFS): It is applied in the L-type electronically controlled fuel injection system to measure the air intake of the engine and input the signal into the ECU as the main control signal for fuel injection and ignition control.

5. The signal generally used by electronically controlled engines is the ignition signal and the fuel injection signal, and the engine can be started. It can maintain the rotation.

What's wrong with the car engine fault signal light?

If there is a problem with the air intake system, there will be poor combustion and the engine fault light will turn on.

The problem with the sensor is mainly due to damage to the oxygen sensor, water temperature sensor, crankshaft position sensor and air flow sensor, or when the contact is poor, the driving computer of the car cannot obtain the relevant data of the engine, resulting in the engine failure light.

Maybe you are not very clear about the reason why the car engine fault light is on. As an old repairman, I can briefly explain it to you. As for the oil, it is necessary to choose the appropriate oil and gasoline according to the characteristics of the engine. There is a problem with the sensor of the vehicle, causing the fault light to turn on.

The engine needs to start ignition normally. What signals does the ECU need to collect?

1. IGd is generated by G signal, which is called cylinder identification signal. The IGF signal is the ignition feedback signal. When the ignition is successful, the ignition coil will give a signal to the ECU, and the ECU will receive the signal and carry out the next ignition.

2. If it is the drive signal of the fuel injector, control the fuel injection timing and pulse width to complete the fuel injection control function; if it is an ignition timing signal, control the on and off of the ignition coil, so that the secondary high-pressure air gap ignition that breaks through the spark plug is generated.

3. The engine electronic control unit ECU determines whether the engine is in the starting state according to the signals provided by the crankshaft position sensor, ignition switch and throttle position sensor, so as to decide whether to control the fuel injection according to the start-up program (2 points);Then, the ECU determines the basic fuel injection volume (2 points) according to the coolant temperature sensor signal.

4. When the car key is turned on to the ON position, the ECU is energized. After the ECU is energized, the corresponding sensor is powered through each pin and the sensor information is obtained to control the operation of the engine. At the same time, the gasoline pump in the fuel tank is energized for 3-5 seconds to provide sufficient pressure on the oil supply system. Many people say that they should wait for the self-test before starting, but in fact, it is not necessary.

5. When the engine starts, ecu is judged according to the signal. The ECU, also known as the driving computer, is a special microcomputer controller for automobiles and is composed of large-scale integrated circuits.

6. Modification of ECU is to achieve the purpose of changing the operation of the engine by changing the method of dealing with the problem (the originally set ECU program).

What signals does the car engine based on to determine the heavy load condition?

Other parts such as the engine, air conditioner, body weight, and gearbox and other good torque can be used to calculate the load of the engine. I hope it can help you.

Large load, generally speaking: when the throttle valve is close to the maximum, that is, when the driving resistance is large. High load is generally manifested as: hill climbing, load, and rapid acceleration.

When the engine load of a car is more than 85% and less than 100%, it is called a heavy load condition. Under heavy load conditions, the external resistance is large. In order to overcome the resistance requirements, the engine should have a large power. The signal of

is judged according to the high voltage of the cooling machine and the low voltage of the heating machine!The large load is caused by the low speed signal and the large throttle signal, which is obtained with the pressure sensor.

Idling Speed After each of us starts the engine normally, the car will go through an idling stage. This stage is nothing more than a matter of length and shortness. So when the driver sits in the car, he can judge the working condition of the engine at the moment by observing the operation of the engine at idle. State.

The reasons for the high idle speed are: the idling switch is not closed, the fault analysis, the idling contact is disconnected, and the ECU determines that the engine is in a partial load state. At this time, the ECU determines the fuel injection amount and injection time according to the air flow sensor, crankshaft position and speed signal.