How to Check if a Car Has Been in an Accident?

What are the two major mechanisms and five major systems of an engine?

Here is the relevant introduction about the two major mechanisms and five major systems of an engine: Two Major Mechanisms 1. Crank Connecting Rod Mechanism: The crank connecting rod is an important component of an automobile engine that realizes the working cycle and completes energy conversion. It consists of the body group, piston connecting rod group, and crankshaft flywheel group. 2. Valve Train Mechanism: The function of the valve train mechanism is to open and close the intake and exhaust valves according to the working sequence and process of the engine, allowing the combustible mixture or air to enter the cylinder and exhaust the waste gas from the cylinder to achieve the gas exchange process. Five Major Systems 1. Starting System: The process of turning the crankshaft under external force until the engine begins to idle automatically is called engine starting. The device required to complete the starting process is called the engine starting system. 2. Fuel Supply System: The function of the gasoline engine fuel supply system is to prepare a certain quantity and concentration of the mixture according to the requirements of the engine, supply it into the cylinder, and exhaust the burned gas from the cylinder. 3. Cooling System: The function of the cooling system is to dissipate the heat absorbed by the heated parts in time to ensure that the engine works at the most suitable temperature. The cooling system of a water-cooled engine usually consists of components such as the cooling water jacket, water pump, fan, radiator, and thermostat. 4. Lubrication System: The function of the lubrication system is to deliver a certain amount of clean lubricating oil to the surface of relatively moving parts to achieve liquid friction, reduce frictional resistance, and alleviate wear of the parts. 5. Ignition System: The ignition system usually consists of components such as the generator, battery, distributor, ignition coil, and spark plug.

17

1

Share

What Happens If a Car Is Not Maintained on Time?

A minor service takes 30-40 minutes, while a major service lasts between one to two hours. If parts need repair or replacement, the time will be longer. Below is relevant information about car maintenance: 1. The interval for a minor service depends on the effective duration or mileage of the engine oil and oil filter used. The validity periods of mineral oil, semi-synthetic oil, and full-synthetic oil vary by brand and grade, so follow the manufacturer's recommendations. 2. Oil filters are generally divided into standard and long-life types. Standard oil filters are replaced along with the oil, while long-life oil filters have a longer service life. In summer, when temperatures are higher, evaporation of oil and water increases. Therefore, ensure the fuel tank cap is tightly sealed and check for oil leaks in the fuel lines. Regularly inspect the coolant level in the radiator, the oil level in the crankcase, the brake fluid level in the master cylinder, and the electrolyte density and level in the battery. If any levels are not within specifications, promptly top up or adjust them.

14

1

Share

What size tires are suitable for 18x8j wheels?

Wheels sized 18x8j are paired with 235-width tires. Below are the meanings of tire specification naming conventions: 1. 195 indicates the tire width is 195mm. 2. 55 represents the aspect ratio, meaning the sidewall height is 55% of the width. 3. R denotes that the tire is a radial tire, with inner layers constructed in a radial manner. 4. 15 signifies the rim diameter is 15 inches. 5. 85 is the load index, where 85 corresponds to a maximum load capacity of 515 kg, and four tires can bear 515×4=2060 kg. 6. V indicates the speed rating is 240 km/h.

13

2

Share

What is the oil specification for the Jeep Cherokee?

jeep Cherokee uses the original specialized fully synthetic oil with the specification: SAE-0W-20, and the general filling volume is about 6L. The following is relevant information: 1. Engine oil usually includes several types such as mineral oil, synthetic oil, and semi-synthetic oil. 2. The viscosity grade of engine oil is generally classified according to the SAE international standard. SAE is the abbreviation for the Society of Automotive Engineers in English. 3. "W" stands for winter. The smaller the number before it, the better the low-temperature fluidity of the oil, indicating that it can be used in lower environmental temperatures and provides better protection for the engine during cold starts. 4. The number after "W" indicates the oil's high-temperature resistance. The larger the number, the better the oil's protective performance at high temperatures.

19

4

Share

What does M plus/minus gear mean?

M gear is a gear position in cars with a manual-automatic transmission. When the M symbol shows a "+" sign, it means upshift, and when it shows a "-" sign, it means downshift. The functions of the M gear in automatic transmission cars are as follows: 1. Manual adjustment of gear shifting: You can press this button to upshift or downshift, and freely adjust by moving the gear lever left/right or up/down. 2. Gear shifting operations are only executed within safe parameters, meaning shifts will only occur within preset safety limits for upshifts and downshifts. 3. In manual-automatic mode, there's almost no need to worry about damaging the car or stalling due to operation. More often, it's about enjoying the driving experience. 4. CVT transmissions offer a more direct power feel, mainly compared to dual-clutch transmissions and traditional AT transmissions. CVT transmissions might be slightly different since they are continuously variable, but when shifted to M gear or S gear, they simulate several regular AT gear positions.

1

Share

Is High Beam Allowed on Highways?

Under appropriate conditions, high beams must be used when driving on highways at night. Especially when maintaining sufficient following distance and encountering poor road conditions, using high beams can ensure driving safety. When not to use high beams on highways: 1. When following another vehicle, to avoid affecting the driver ahead, turn off high beams and maintain adequate distance. 2. When preparing to overtake, turn off high beams and activate turn signals to alert the vehicle ahead; after completing the overtake, you may switch back to the original lane and resume high beam usage. 3. When entering toll stations or service areas, reduce speed and turn off high beams. 4. When passing ramp intersections, turn off high beams - continuous curves (where high beams are prohibited) are commonly encountered, please reduce speed accordingly.

7

1

Share

How to Check if a Car Has Been in an Accident?

What are the two major mechanisms and five major systems of an engine?

What Happens If a Car Is Not Maintained on Time?

What size tires are suitable for 18x8j wheels?

What is the oil specification for the Jeep Cherokee?

What does M plus/minus gear mean?

Is High Beam Allowed on Highways?

Is Hongqi a Domestic Brand?

Is it normal to hear a hissing sound when opening the fuel tank cap?

At what level of wear should brake discs be replaced?

Correct Method for Parking an Automatic Transmission Vehicle