What Causes the Oil Pressure Warning?

What are the reasons for a 24V parking generator not starting?

Here are the specific reasons why a 24V gasoline generator does not start: 1. Check if the starter motor is rotating: If the starter motor does not rotate during the starting process or the starter motor can rotate but feels obviously weak in starting, you can first check the power supply to see if the battery has sufficient charge; if the battery has sufficient charge but the starter motor shows no response during starting, check whether there are any suspicious fault codes in the starting system and troubleshoot according to the fault code prompts. 2. Check the fuel supply: Under the premise that the battery has sufficient charge and the starter motor rotates normally, check whether the fuel supply is normal, turn on the ignition switch to check if the fuel pump is working properly, and check if the fuel pressure is normal. 3. Check the intake and exhaust systems and the ignition system: If the intake is not smooth or there is air leakage, it will cause the mixture to be too rich or too lean, resulting in the engine failing to start.

10

4

Share

Can Vehicle Inspection Be Conducted Anywhere?

Vehicle inspection cannot be conducted anywhere. Regulations: For periodic vehicle inspection, you only need to go to the vehicle management office or the vehicle inspection stations or testing centers designated by the vehicle management office. The vehicle management office usually has a window at the inspection station, and after the vehicle passes the inspection, the stamp can be directly obtained at the window. Inspection Process: Pay for the initial inspection of the exterior and vehicle condition, fill out the exhaust emission test form. If qualified, check for any traffic violation records. If there are no issues, proceed to pay a deposit and receive and fill out the inspection form. Then, inspect the exterior, headlights, roof beams, engine, transmission, etc., to ensure they meet the standards. If all are qualified, the stamp and signature can be obtained, and you can wait for the review to be approved.

2

3

Share

What Are the Reasons for High Fuel Consumption in Diesel Vehicles?

There are three main reasons for increased fuel consumption in vehicles: personal factors, such as inadequate driving skills; the condition of the engine; and lack of maintenance during vehicle use. The reasons for increased fuel consumption in vehicles can be summarized as follows: Personal factors, such as inadequate driving skills: Improper gear shifting and excessive braking by the driver can artificially increase engine power loss. Frequent braking also leads to more frequent starts, and starting consumes a higher rate of fuel. The condition of the engine is directly related to fuel consumption: If the engine has issues, fuel consumption will significantly increase. High idle speed adjustment, partial short-circuiting of the high-voltage coil, burnt distributor contacts, or capacitor breakdown can weaken the high-voltage spark, reduce ignition capability, and leave some of the fuel mixture unburned, all of which increase fuel consumption. Lack of maintenance during vehicle use: Not using fuel additives regularly. Methods to reduce fuel consumption: Clean engine carbon deposits. Excessive carbon buildup in the engine is a major cause, primarily due to the use of unsuitable fuel. It is recommended to add a certain amount of cleaning agent when refueling. If the effect is not noticeable, it indicates significant carbon buildup in the engine. In such cases, the vehicle must be taken to a 4S shop for professional cleaning of the engine's carbon deposits by technicians. Check the oxygen sensor. As an internal control unit of the vehicle, the oxygen sensor monitors the air-fuel ratio in the engine. If it is damaged, the air-fuel ratio will become unbalanced, leading to a sudden increase in fuel consumption. A damaged oxygen sensor will cause the exhaust pipe to emit darker-colored exhaust gases, indicating the need for replacement. Regularly replace the three filters. During vehicle use, the oil filter, air filter, and fuel filter must be replaced periodically. If left unchanged for too long, they become dirty and clogged, sending incorrect signals to the engine control unit, resulting in incomplete fuel combustion and increased engine carbon buildup. Check the electronic control unit. Although the engine's electronic control unit is highly reliable, in older vehicles, various malfunctions are inevitable.

5

2

Share

Why Does the Engine Stall When It Lacks Engine Oil?

It is true that the engine will stall when it lacks engine oil. Reasons: Without engine oil, the pistons and bearing shells lose lubrication, causing rapid heating due to friction. When the heat reaches a certain level, the engine seizes, leading to stalling. Lack of engine oil and overheating are major concerns for the engine, severely affecting its lifespan. Function of Engine Oil: Engine oil serves as a lubricant. During engine operation, the crankshaft connects to the connecting rod via components commonly referred to as "bearings," and the crankshaft is also mounted on the engine block through bearings. Additionally, the piston rings and cylinder walls experience friction. Without engine oil lubrication, these parts undergo dry friction, increasing the friction coefficient and causing severe wear on engine components. Solution: The only option is to take the vehicle to a 4S shop for engine repair. Additionally, ensure regular oil changes, oil top-ups, and cleaning of internal engine piston deposits to maintain normal engine operation.

3

Share

What is the difference between engine oil C3 and C5?

C3 and C5 refer to the testing and certification standards for automotive lubricants set by the automobile manufacturing industry. C5 is the highest grade in this series of standards, corresponding to the best oil quality and performance, while C3 ranks third in the grade hierarchy. The standards for defining engine oil are as follows: 1. API Grade: The API (American Petroleum Institute) oil grade is an American standard, classified using two letters. It is used to determine the performance level of the oil and the applicable model years of vehicles. The current API-SM classification was adopted in 2004. 2. SAE Viscosity Grade: SAE specifies 11 oil viscosity grades, indicating which grade of oil should be used at what atmospheric temperature. Among these 11 grades, 6 are winter oils, denoted by the letter W, including 0W, 5W, 10W, 20W, and 25W. The number before the W indicates the lowest temperature at which the oil can be used, with smaller numbers corresponding to lower temperatures. For example, SAE 0W is suitable for a minimum temperature of -35 degrees Celsius, SAE 5W for -30 degrees Celsius, and so on. Summer oils are not denoted by letters but are directly marked with numbers, including 20, 30, 40, 50, and 60, which represent the maximum temperature at which the oil can be used.

3

2

Share

What does AEB mean in cars?

AEB stands for Autonomous Emergency Braking, which is translated as automatic braking system in Chinese. It is an active vehicle safety technology that can automatically monitor the distance and relative speed of objects ahead. When the driver brakes too late, with insufficient braking force, or fails to brake, the vehicle will issue a warning or initiate autonomous braking. Process of Autonomous Emergency Braking (AEB): If the driver does not respond to the Forward Collision Warning (FCW) and the danger level continues to escalate, the system will request the powertrain to reduce torque and the braking system to perform emergency braking. Active torque reduction: in dangerous situations, the system can request the powertrain to reduce torque. Emergency braking: depending on the target identified by the sensors and the danger level, the system can apply different levels of autonomous braking. Classification of Autonomous Emergency Braking: Partial Autonomous Emergency Braking (Standard) (AEB-Pstandard) Standard partial autonomous emergency braking triggers early (simultaneously with the emergency warning), primarily to give the driver more reaction time. If the driver does not respond, it will also reduce the danger level of the accident. This function is used for moving and stationary targets, with a deceleration range of (-1.5~-3.5) m/s², and can reduce the vehicle speed by up to 40 km/h. Partial Autonomous Emergency Braking (Enhanced) (AEB-Pextended) When the driver does not respond to the standard partial autonomous emergency braking or the situation is already very urgent, the system will activate partial emergency braking with higher deceleration to avoid an accident or reduce its severity. This function is used for moving and stationary targets, with a deceleration range of (-1.5~-6) m/s², and can reduce the vehicle speed by up to 40 km/h. Medium-speed Autonomous Emergency Braking (AEB-M) Used for moving and stationary targets. This function activates at medium speeds. When the system calculates that a large, uncomfortable deceleration is necessary to avoid a collision, it will trigger this function to perform automatic braking to minimize the relative speed between the two vehicles as much as possible. This function is used for moving and stationary targets, with a deceleration range of (-1.5~-8) m/s², and can reduce the vehicle speed by up to 40 km/h. High-speed Autonomous Emergency Braking This function is used for emergency braking when the sensors detect pedestrians, with higher priority than AEB-M. The maximum deceleration is -9 m/s², and it can reduce the vehicle speed by up to 24 km/h.

3

5

Share

What Causes the Oil Pressure Warning?

What are the reasons for a 24V parking generator not starting?

Can Vehicle Inspection Be Conducted Anywhere?

What Are the Reasons for High Fuel Consumption in Diesel Vehicles?

Why Does the Engine Stall When It Lacks Engine Oil?

What is the difference between engine oil C3 and C5?

What does AEB mean in cars?

Is Fast Battery Drain a Fuel Quality Issue?

Does having 9 points deducted from C1 license affect the process of upgrading to B2?

Is It Normal to Drive 600 km with 50 Liters of Fuel?

What is the content of Subject 4 exam?