How to Shift Gears?

What to Do When Vehicle Inspection Shows Excessive CO in Exhaust?

If the CO level in the exhaust fails the inspection, the solution is to clean or replace the three-way catalytic converter. The three-way catalytic converter is a crucial component for processing vehicle exhaust. The gases produced after combustion must pass through it for conversion before being released from the vehicle. During this process, harmful gases such as CO and HC+NOX (hydrocarbons and nitrogen oxides) are converted into harmless substances like carbon dioxide and nitrogen. Here is additional information: Reasons for cleaning or replacing the three-way catalytic converter: Primarily, during use, the process of handling combustion gases can lead to carbon buildup, clogging, poisoning, or failure of the three-way catalytic converter. Such issues reduce or even eliminate its conversion capability, resulting in excessive vehicle exhaust emissions. Spark plugs can also affect exhaust emissions: The ignition system, including spark plugs and ignition coils, is another significant cause of excessive exhaust emissions. Over time, spark plugs can accumulate carbon deposits or become eroded, deteriorating their performance. This leads to incomplete combustion of gases in the combustion chamber, increasing the presence of toxic gases in the exhaust. If carbon deposits are present on the spark plugs, they can be cleaned with a cleaning agent and sanded with sandpaper to restore their activity. If erosion occurs, replacement is necessary.

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How to Adjust the Ignition Timing Advance Angle of a Car?

Changing the ignition timing advance angle of a car involves the use of mechanical centrifugal and vacuum-type adjustment devices. Below is an introduction to the methods for adjusting the ignition angle: Centrifugal Ignition Timing Advance Adjustment Device: When the engine speed changes, it automatically alters the phase relationship between the breaker cam and the distributor shaft to adjust the ignition timing advance angle. As the speed increases, the centrifugal force on the weights also increases, overcoming the spring force and causing them to move outward. This action, through a linkage mechanism, advances the cam on the shaft by an angle to increase the ignition timing advance angle. This device operates when the crankshaft speed is between 400 and 1500 rpm. Vacuum Ignition Timing Advance Adjustment Device: This device automatically adjusts the ignition timing advance angle when the engine load, i.e., the throttle opening, changes. The change in throttle opening alters the surrounding vacuum level, which, through the vacuum chamber and its linkage mechanism, causes the distributor housing and fixed plate, along with the contacts, to rotate relative to the cam, thereby increasing the ignition timing advance angle. This device does not function when the throttle is fully open or nearly closed.

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Can Blue License Plate Trucks Enter Urban Areas?

The regulations for blue license plate trucks entering urban areas vary by city. There is no nationwide unified regulation, as each city formulates its own traffic restriction measures. Below are additional details regarding blue license plate trucks entering urban areas: Different city regulations: In some cities, local blue license plate trucks require a permit to enter, while out-of-town blue license plate trucks are prohibited from entering the urban area; in other cities, local blue license plate trucks can freely enter the urban area, but out-of-town blue license plate trucks are not allowed; in some cities, there are no entry restrictions for blue license plate trucks. Driving conditions for blue license plate trucks: The requirements for driving a blue license plate light truck are not stringent. Drivers holding a C1 license can operate them, and thus, a freight qualification certificate is no longer required to drive a blue license plate light truck.

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What are the methods to determine if car engine oil needs to be replaced?

Engine oil plays a vital role in lubricating and reducing friction, assisting in cooling, sealing against leaks, preventing rust and corrosion, and cushioning shocks in the engine. Below are the methods to determine if the oil needs replacement: Based on oil type: Engine oil degrades over time. Conventional oil typically begins to oxidize after about three months of exposure to air, leading to reduced functionality. Based on engine runtime and operating conditions: Runtime: If the engine remains inactive after adding oil, it is equivalent to leaving the oil exposed to air, causing it to deteriorate. Operating conditions: The wear on oil varies significantly between idling and running at 6000 RPM due to differences in engine friction and stress. Based on engine intensity: High-performance engines are more resistant to high pressure, high temperatures, and stronger shear forces, but they also consume oil more rapidly and require higher-grade oil. Turbocharged engines, for example, are 1.3 to 1.5 times more intense than naturally aspirated engines, necessitating shorter oil change intervals. By date: If the recommended mileage for an oil change is not reached, time becomes the determining factor, as oil can degrade over time. By mileage: Follow the manufacturer's guidelines (user manual) and replace the oil when reaching or before the specified mileage.

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Can a Manual Transmission Be Converted to an Automatic Transmission?

A manual transmission cannot be converted to an automatic transmission for the following reasons: The structure of a manual transmission and its connection to the engine differ from that of an automatic transmission. Manual transmissions have a clutch, while automatic transmissions do not. Their operating principles are also different, making them non-interchangeable. When a car is manufactured, all its components are designed to work together in the most optimal state. Forcibly modifying the transmission can compromise safety. According to Article 16 of China's "Road Traffic Safety Law," no unit or individual is allowed to alter the registered structure, construction, or characteristics of a motor vehicle without authorization. Below is an introduction to the differences between manual and automatic transmissions: Different shifting methods: Manual transmissions require the driver to use the clutch pedal to shift gears, while automatic transmissions allow the driver to shift without using the clutch. Different gear positions: Manual transmissions have gears 1 to 5 plus reverse (R), requiring the driver to shift manually when the speed and gear do not match. Automatic transmissions have Park (P), Neutral (N), Reverse (R), and Drive (D). When driving, shifting to D allows the car to move when the accelerator is pressed and stop when the brake is applied.

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Is the speed limit for trucks on highways 80 or 90 km/h?

Truck speed limits are capped at 80 km/h, with a minimum speed not lower than 60 km/h. Below are the legal bases for truck speed limits: Highway speed regulations: Highways must indicate the driving speed for each lane. The maximum speed must not exceed 120 km/h, and the minimum speed must not be lower than 60 km/h. On highways, the maximum speed for small passenger vehicles must not exceed 120 km/h, other motor vehicles must not exceed 100 km/h, and motorcycles must not exceed 80 km/h. Speed regulations for different lanes: For roads with two lanes in the same direction, the minimum speed for the left lane is 100 km/h. For roads with three or more lanes in the same direction, the minimum speed for the leftmost lane is 110 km/h, and the minimum speed for the middle lane is 90 km/h.

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How to Shift Gears?

What to Do When Vehicle Inspection Shows Excessive CO in Exhaust?

How to Adjust the Ignition Timing Advance Angle of a Car?

Can Blue License Plate Trucks Enter Urban Areas?

What are the methods to determine if car engine oil needs to be replaced?

Can a Manual Transmission Be Converted to an Automatic Transmission?

Is the speed limit for trucks on highways 80 or 90 km/h?

How to distinguish the generation of a Civic?

What parts are replaced during a minor service?

Do I Need to Renew My Expired Driver's License?

How to Change an Out-of-Town License Plate to a Local One?