Question 1: How to control the engine speed 1. In the same gear, the more friends give, the higher the speed

2. Upshifting will definitely reduce the speed< /p>

(For example: the engine at 2000 rpm can rotate 100 times in 1st gear. At this time, the vehicle speed reaches 30km/h. At this time, you change to 2nd gear, but at 30km/h, the 2nd gear rotates 80 The engine speed will naturally be brought down when there is no increase in power)

Each engine outputs different power and torque at different speeds, and the tachometer is to let the driver know Understand the output status of the engine

Question 2: The principle of engine speed control. The throttle controls the throttle, which is to control the intake air. The car has an intake air volume sensor, so the point injection device injects fuel according to the intake air volume. , the two are combined to form a combustible mixer that enters the cylinder. The more combustible mixers there are, the stronger the work after ignition is, making the speed faster.

The maximum speed is artificial, and the main sensor is the sensor of the intake air volume. , when the air intake reaches a certain amount, the point injection device will stop injecting fuel. In this way, the speed will definitely not increase, and the vehicle speed will definitely not increase. This is the speed limit of the car.

Question 3: Engine The speed of the engine is controlled by what it does. It is related to the number of times of work per unit time or the effective power of the engine. That is, the effective power of the engine changes with the different speeds. Therefore, when describing the effective power of the engine, its corresponding rotation speed must also be specified. The effective power and corresponding speed specified on the engine product label are called calibrated power and calibrated speed respectively. The working condition of the engine under the calibrated power and calibrated speed is called the calibrated operating condition. The calibrated power is not the maximum power that the engine can produce. It is the maximum effective power limit based on the engine's purpose. Engines of the same type have different calibrated power values ??when used for different purposes. Effective torque also changes with engine operating conditions. Therefore, the maximum torque that a car engine can output and its corresponding speed are used as an index to evaluate the engine's power.

Question 4: What controls the car’s engine speed? I don’t even know what kind of car it is.

Question 5: What controls the car’s tachometer? It uses the pulses of charging and discharging capacitors. Schematic diagram of an electronic tachometer. When the engine is running, the distributor contacts open and close continuously, and the number of openings and closings is proportional to the engine speed. That is, for every revolution of the crankshaft, the contacts of a four-stroke four-cylinder engine open and close twice; the contacts of a six-cylinder engine open and close three times. , the contact opening and closing generates an intermittent current, which is shaped by the integrating circuit R1, R2, C1 and sent to the transistor VT1, thereby obtaining a rectangular current with a fixed amplitude (current value) and pulse width (time). This current passes through the mA Table mA. When the contact is closed, the transistor VT1 has no bias and is in a cut-off state, and the capacitor C2 is charged. The charging circuit is the positive electrode of the battery - resistor R3 - capacitor C2 - diode VD2 - negative electrode of the battery. When the contacts are separated, the base potential of the transistor VT1 is close to the positive pole of the power supply, and VT1 changes from cut-off to conduction. At this time, the charge filled in the capacitor C2 is discharged by the milliamp meter. The discharge circuit is the positive pole of the capacitor C2 - transistor VT1 - milliamp. Ammeter-diode VD2 returns to the negative pole of C2. The contacts open and close repeatedly, repeating the above process. Diode VD2 provides a charging circuit for container C2, and VD1 provides a discharging circuit for C2. Since the amount Q of each charge and discharge of C2 is proportional to the capacitance C and the voltage U across the capacitor, that is, Q=CU, so the average discharge current in each cycle (T) is: I=Q/T=CU/ T＝CUf In the formula: f——is the opening and closing frequency of the contact. When the power supply voltage is stable and the charging time constant R3C3 remains unchanged, C and U are fixed values, then the average current I through the milliamp meter is proportional to the opening and closing frequency f of the contact, so the reading of the milliamp meter It can directly reflect the engine speed.

Question 6: What controls the speed of a car engine? As the energy released by combustion increases, it will speed up (under the condition that the load remains unchanged).

The damper adjusts not only the air, but also the amount of combustible mixture entering the engine. That is to say, when more air enters, more oil also enters.

If you try to improve the combustion quality, the speed will increase if all other conditions remain unchanged. However, the problem is that it is not easy to improve the combustion quality.

Question 7: How does the car's engine speed control the throttle opening, air intake volume, and fuel injection computer?

Question 8: What is the electronically controlled engine like? Controlling the speed 1. The more friends give in the same gear, the higher the speed 2. Upshifting will definitely reduce the speed (for example: a 2000-rpm engine can rotate 100 times in 1st gear. At this time The vehicle speed reaches 30 km/h.

At this time, you shift to 2nd gear, but 80 turns of the 2nd gear will take you there at 30 km/h. The engine speed will naturally be brought down when there is no increase in power) The power and torque output by each engine at different speeds are Differently, the tachometer is designed to let the driver know the output status of the engine

Question 9: How does the engine speed of an automatic transmission car be controlled? Haha! Whether it is AT (automatic transmission) or MT (manual transmission), the accelerator pedal directly controls the throttle to control the engine speed.

Question 10: How does an EFI diesel engine control the engine speed? When the accelerator is stepped on, the spring preload on the balance flying block inside the governor is compressed through the transmission mechanism, and the governor outputs a corresponding increase. The force of a large amount of oil, this force then pulls the rack on the high-pressure oil pump through the transmission mechanism. The rack drives the plunger in the high-pressure oil pump to rotate at an angle. The head of the plunger is spiral and oblique. The angle of the plunger is different, and the oil supply The amount is different. When refueling, the sealing surface of the plunger head becomes longer, the injection amount becomes larger, and the rotation speed increases. On the contrary, the speed will decrease. No matter how fast the diesel engine rotates, the speed of the piston is zero when it is at the upper and lower dead centers. During the entire stroke of the piston, the speed is maximum at the midpoint of the stroke. Generally, the moving speed of the piston is expressed by the average speed of the piston in m/s. The greater the amount of fuel injection, the greater the explosive (explosion) force during combustion, the more work will be done, and the faster the piston will move downward.