What is the function of car engine oil?

What Does Dual Carriageway Mean?

Dual carriageway generally refers to a two-way roadway. Introduction to two-way roadways: Roads are typically composed of two lanes running in opposite directions, known as two-way roadways. A roadway refers to the striped portion of a highway designated for various vehicles to travel longitudinally, safely, and comfortably, including the most common configurations such as dual four-lane, dual six-lane, and dual eight-lane roadways. Precautions for navigating two-way roadways: On curves of two-way roadways, it is difficult to observe the road conditions ahead. At such times, it is essential to stay within your own lane and never encroach into the opposing lane, as vehicles may approach from the other side of the curve at any moment. Occupying the opposing lane can lead to unexpected situations and potential accidents.

10

4

Share

Is it allowed to overtake a slow-moving vehicle in a tunnel?

Overtaking is not allowed in tunnels. Due to the inherently narrow space inside tunnels, overtaking poses significant risks. During the initial design phase of tunnels, construction authorities established regulations prohibiting arbitrary lane changes and overtaking based on factors such as tunnel curvature, depth, and vehicle traffic standards. Currently, similar regulations are implemented in tunnels nationwide. Reduce speed and turn on lights before entering the tunnel: When driving during the day, the sudden dimming of light upon entering a tunnel can cause temporary visual impairment as human eyes take time to adjust. Therefore, approximately 100 meters before entering the tunnel, drivers should reduce speed, increase following distance, and activate headlights to safely enter the tunnel at a relatively slower speed. Maintain a sufficiently safe following distance: The drastic difference in light levels when entering or exiting a tunnel can cause momentary blindness, leading many drivers to instinctively brake. Additionally, following vehicles may also experience this temporary blindness. Thus, maintaining a greater following distance is essential to ensure adequate safety.

20

1

Share

What to Do When a Car Won't Start?

Jump-starting: Bring two vehicles close together, connect the positive and negative terminals of their batteries, turn off all auxiliary electrical equipment in the vehicles, and start the vehicle with the dead battery. After starting, lightly press the accelerator pedal, turn off the ignition switches of both vehicles, and carefully remove the cables. Push-starting: Utilize a downhill slope, turn on the ignition switch before pushing the vehicle. Once the desired speed is reached, shift the transmission into second gear, quickly release the clutch pedal, and apply throttle. Analysis of Fault Symptoms: If a whirring sound is heard when the starter drive gear engages with the engine flywheel ring gear during startup, there are two possible causes: First, the engagement surface of the flywheel ring gear may be deformed. Second, the gap between the starter drive gear and the flywheel ring gear may be too large. If they cannot mesh properly, the engine will not start. When the main power switch is turned on, the starter drive gear engages with the flywheel ring gear and rotates together. This issue can arise due to two reasons: First, the holding coil of the starter solenoid may be incorrectly connected to the power terminal. Second, the three wires on the ignition switch may be misconnected. The diagnostic method is as follows: When the key is in the "0" position, the starter drive gear does not rotate; when in the "2" position, the starter motor drive gear engages with the flywheel ring gear and rotates together. If the engine does not start when the ignition switch is turned to the start position and no other symptoms appear, the possible causes are: First, the key or switch may be worn out and fails to complete the starter circuit. Second, the starter relay may not be connecting the starter solenoid circuit. Third, the power switch may not be completing the main circuit. Using a screwdriver to bridge the terminals at the rear of the starter can complete the starter circuit, allowing the engine to start. Testing the Starting System: The starting system's circuit generally includes the following basic components: the battery, the starter motor, and the cables connecting these parts. Additionally, the ignition switch, starter relay, solenoid coil, and the vehicle's anti-theft system are also critical components of the starting system. Malfunctions in any of these parts can lead to difficulty starting the engine or complete failure to start.

7

0

Share

Do the speed display screens on highways take photos?

The speed display screens on highways do not have the function of capturing speeding violations. Speed reminder screens: They are designed to provide speed feedback to drivers. In fact, the complete system of a speed reminder screen consists of a speed measurement screen (the core speed measurement and display component) and a speed limit sign. Each sign features a prominent number indicating the speed limit for that lane. When a detected vehicle exceeds this speed limit, the speed displayed on the LED screen turns red to alert the driver. Principle: The speed reminder screen is composed of a radar and an LED screen, operating on the principle of radar speed measurement. When a vehicle enters the radar detection zone, the radar continuously emits electromagnetic waves towards the moving vehicle, which are then reflected back. The speed of the detected vehicle is calculated based on the frequency difference between the emitted and reflected waves.

5

1

Share

Which car models feature suicide doors?

Car models featuring suicide doors include: Mazda RX-8, BMW i3, Lincoln Continental, MINI, Honda Land Cruiser, etc. Toyota Land Cruiser: The 4.0L Toyota Land Cruiser Automatic GX-R is equipped with a 5-speed automatic manual transmission, with a top speed of 190 km/h, maximum torque of 385 N·m, and peak torque at 4400 rpm. The front suspension features a double-wishbone independent suspension with coil springs, while the rear suspension adopts a four-link non-independent suspension. Hyundai Coupe: The Hyundai Coupe sports car was developed based on the HCD-II concept vehicle. The concept car was powered by a 5.0L V8 engine, delivering maximum power of 309 kW at 6000 rpm and peak torque of 518 N·m. Available colors include Emerald Black, Obsidian Black, Tungsten Gray, Topaz Brown, Coral Red, and Pearl White.

5

2

Share

Is it safe to drive on the highway with a tire pressure of 2.9 bar?

It is not recommended to drive on the highway with a tire pressure of 2.9 bar. A tire pressure of 2.9 bar is already quite high, which can easily lead to tire blowouts and increased braking distances, posing significant dangers. Introduction to standard tire pressure: According to the international GBT2978-2008 standard, the recommended tire pressures for different types of tires are as follows: Standard tires: 2.4-2.5 bar; Reinforced tires: 2.8-2.9 bar; Maximum pressure: should not exceed 3.5 bar. The hazards of excessive tire pressure include: Reduced friction and adhesion of the tires, affecting braking performance; Increased steering wheel vibration and deviation, reducing driving comfort; Accelerated wear of the central tread pattern, shortening tire lifespan; Increased vehicle vibration, indirectly affecting the lifespan of other components. Additionally, it reduces the contact area between the tires and the road, diminishing the vehicle's handling and driving stability.

9

5

Share

What is the function of car engine oil?

What Does Dual Carriageway Mean?

Is it allowed to overtake a slow-moving vehicle in a tunnel?

What to Do When a Car Won't Start?

Do the speed display screens on highways take photos?

Which car models feature suicide doors?

Is it safe to drive on the highway with a tire pressure of 2.9 bar?

Does an Engine Auto Start-Stop System Malfunction Affect Driving?

What Causes the Car Multimedia Screen to Go Black?

Can Used Cars Be Used to Deduct VAT?

How to Solve the Problem of Heavy Clutch in Volkswagen Cars?