What are the preparation rules before the Subject 2 driving test?

What is the structural principle of a motorcycle charging system?

There are three structural principles of a motorcycle charging system: AC charging and AV charging. AC charging: After inserting the charging gun into the vehicle's charging port, the detection point can detect that the 12V voltage passes through RC and the S3 switch to ground. At this point, the voltage at the detection point is no longer 12V, and the vehicle can detect through detection point 3 that the charging gun has been inserted into the port. The R4 resistor is used to check whether the charging gun is fully inserted. If it is not fully inserted, the switch (located on the charging gun) opens, and the resistor is connected in series into the circuit, allowing the charger to be informed via the detection point. Additionally, the voltage detected at detection point 3 can determine the RC resistance value, thereby identifying the charging gun model. After the charging gun is inserted into the vehicle's charging port, the 12V voltage passes through S1 and R1, reaching detection points 1 and 2 in sequence, and then grounding through R3 to complete the circuit. At this point, the voltage at detection points 1 and 2 is no longer 12V. Due to the voltage division by R1=1000 ohms and R3=3000 ohms, the detection point voltage is 9V. When a voltage of 9V is detected, the S1 switch changes from 12V to a PWM signal connection. At this point, detection points 1 and 2 will display a duty cycle signal that changes from 9V to -12V, confirming the charging gun connection. Then, the S2 switch closes to provide feedback to the charging equipment. After S2 closes, R1 (in series), R2, and R3 (parallel resistors, R2=1500 ohms, parallel resistance value of 1000 ohms) are added to the circuit, changing the circuit voltage from 9V to 6V. At this point, the charger can approve charging. AV charging: When the power plug is inserted into the power supply equipment, the PWM inputs a low level. At the same time, the 5V voltage completes the circuit, causing the photodiode to emit light, and the 12V voltage circuit is connected, providing a forward bias voltage to T1. The 12.5V above passes through T1's collector and emitter, outputting to CP. The voltage on the CP output side is a 12V high level.

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What causes the electric starter of a motorcycle to idle?

The reason is an electric starter slipping issue. The specific causes and solutions are as follows: Electric starter slipping: Since the electric starting device and the engine transmission adopt a very meshing method, during each electric starting condition, the electric starter overrunning clutch assembly moves and engages with the crankshaft starting gear, but fails to subsequently transmit power to the crankshaft. Sometimes, due to certain reasons, the electric starter overrunning clutch cannot properly engage with the crankshaft starting gear, causing the electric starter overrunning clutch assembly to idle and failing to effectively transmit power to the crankshaft starting gear, resulting in the electric starter slipping phenomenon. Solution: Check the battery to ensure its technical condition is good.

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Where Can I Get a Replacement Key for an Electric Door?

You can contact the manufacturer or the dealer to get a replacement car key. Electric doors feature a non-stop clutch mechanism and other characteristics: Non-stop Clutch Mechanism: In case of a power outage or other malfunctions that prevent the door from operating normally, simply use the clutch key to turn the electric door switch to the disengaged state, allowing manual control. The LED display can show customizable advertisements, which customers can modify themselves. Equipped with a microcomputer control system and advanced electric door navigation technology, the door can follow a predetermined path without any tracks. Other Features: It can automatically retrieve the predetermined route and correct errors to ensure the door follows the set path. It eliminates friction noise from the electric door and can withstand strong winds.

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What Causes the Fuel Gauge to Be Inaccurate After Replacing the Fuel Pump?

The fuel gauge inaccuracy is only related to the float (fuel sensor) and has nothing to do with the fuel pump. The fuel gauge detects the fuel level through the float: If the detection signal is distorted, the fuel gauge will show inaccurate readings. The tachometer is related to the generator, as its sampling part comes from the generator's neutral line, while the speedometer is closely connected to the speed sensor (on the transmission) and the instrument voltage regulator module. To address these fuel gauge issues, it is recommended to choose higher-quality gasoline when refueling, as cleaner gasoline reduces impurities in the fuel pump, thereby lowering the probability of fuel gauge malfunctions. In cases where the fuel level display is controlled by the computer: Computer signal failures may also cause inaccurate displays, but this is very rare.

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What are the types of handbrakes?

There are three types of handbrakes. The function of the handbrake: The parking brake, commonly known as the handbrake, provides resistance to the car when parked to prevent it from rolling. The parking brake, whether it's the handbrake or the parking gear in an automatic transmission, locks the drive shaft or the rear wheels. Types of handbrakes: Handbrakes are categorized into traditional handbrakes, foot brakes, and electronic handbrakes. The traditional handbrake is the parking brake commonly seen in most vehicle models, usually located where the driver's right hand naturally rests, behind the gear lever for easy access. The foot brake, as the name suggests, is operated by foot. The operation of this parking brake is similar to the handbrake—pressing the pedal engages the brake, and pressing it again releases the brake as the pedal automatically pops up. The electronic handbrake is activated or deactivated via a button. Additionally, electronic handbrakes often come with features like AUTO and HOLD, making them a very useful invention for those who prioritize comfort.

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Will the File Number Change When Renewing the License?

The file number on the driver's license will not change if it is renewed locally, but it will change if renewed in a different location. Documents required for renewal: Bring two copies of ID card, two 1-inch recent color photos without hats, original ID card, original driver's license, and a medical examination certificate from a county-level or above hospital (free medical examination is also available at the vehicle management office). Renewal and inspection must meet the following conditions: Holders of large passenger vehicle, tractor, city bus, medium passenger vehicle, or large truck driver's licenses have no points in the current scoring cycle, or holders of other types of driver's licenses have less than 12 points in the current scoring cycle; Holders of large passenger vehicle, tractor, city bus, medium passenger vehicle, or large truck driver's licenses who have points in a scoring cycle, and holders of other types of driver's licenses who have been involved in a traffic accident resulting in death and bear equal or greater responsibility without having their driver's license revoked, and have participated in the inspection education; The applicant has no pending road traffic safety violations or traffic accidents; The applicant's physical condition meets the driving permit requirements; The driver's license is not seized, detained, suspended, revoked, canceled, or withdrawn by law.

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What are the preparation rules before the Subject 2 driving test?

What is the structural principle of a motorcycle charging system?

What causes the electric starter of a motorcycle to idle?

Where Can I Get a Replacement Key for an Electric Door?

What Causes the Fuel Gauge to Be Inaccurate After Replacing the Fuel Pump?

What are the types of handbrakes?

Will the File Number Change When Renewing the License?

What are the principles for using emergency carts?

Where is the QR code located on a compact car?

What Causes the Hissing Sound When Braking After Replacing Brake Fluid?

Can Points Deduction Be Automatically Cleared?