What Does a Car's Automatic Following System Rely on for Detection?

What is the fuel consumption of a new Mazda Axela?

The 'metal-on-metal' squealing sound indicates that the brake pads must be replaced immediately. The fuel consumption of a new Mazda Axela is 7.4L/100km. Here is an introduction to the fuel consumption of a new Mazda Axela: 1. Fuel consumption: The fuel consumption is 7.4L/100km. 2. Precautions: New cars have a break-in period. Due to machining precision and assembly tolerances during manufacturing, new cars tend to consume more fuel and feel underpowered during the break-in period. These issues will significantly improve after the first oil change. The vehicle's driving conditions, mileage, driving habits, and load also directly affect fuel consumption. The same car can have a fuel consumption difference of several liters, with urban and suburban driving conditions potentially doubling the difference, and short trips versus long-distance driving potentially differing by 1-2 times.

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What Causes Steering Wheel Vibration at Speeds Over 120 km/h?

Steering wheel vibration issue at speeds exceeding 120 km/h. Causes of steering wheel vibration at speeds over 120 km/h: This may indicate poor dynamic balance of the two front wheels, which can be adjusted. A car's wheel is an integrated unit composed of the tire and rim. However, due to manufacturing tolerances, mass distribution across this unit cannot be perfectly uniform. When the wheels rotate at high speeds, this creates dynamic imbalance, resulting in wheel vibration and steering wheel shaking during driving. Inspection for steering wheel vibration at speeds over 120 km/h: Check whether the tread contact surfaces (especially front tires) contain large stones or other foreign objects; verify whether tire pressure differences between coaxial or cross-axle tires are excessive; determine if wheel dynamic balance precision inspection and weight distribution were properly performed after wheel/tire replacement or tire repair (excessive dynamic balance deviation can cause vibration). If none of these three factors are problematic, inspect whether four-wheel alignment precision exceeds tolerance when necessary.

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What is the issue with the DC-DC failure in new energy vehicles?

The issue with the DC-DC failure in new energy vehicles. No output from the DC-DC controller: Troubleshooting methods: No high-voltage (DC72V-DC86V) input or no 12V start signal voltage input, as well as a fault in the DC-DC converter itself, can all cause the DC-DC controller to have no output voltage. Measure whether there is high-voltage input at the DC-DC input terminal. If there is no 12V start signal voltage input, it indicates a fault in the main circuit, and further inspection of the continuity of the line between the main signal connector terminal and the constant power battery positive terminal is required. Low output voltage from the DC-DC. Troubleshooting methods: If the DC-DC controller itself is faulty, replace it with a new one. The steps for troubleshooting abnormal DC-DC operation are as follows: first, measure whether there is voltage input; second, measure whether there is a 12V signal voltage input; and third, measure whether there is voltage output.

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What Causes a Car to Misfire?

Car misfiring is caused by clogged fuel injectors; faulty spark plugs, ignition coils, and cylinder wires. Clogged Fuel Injectors: After prolonged use, fuel injectors may become clogged, leading to issues such as altered spray patterns, delayed solenoid valve operation, or excessive fuel injection. This can result in an overly rich air-fuel mixture, causing symptoms like backfiring and engine shaking. If a single injector is clogged, it may also cause intermittent misfiring and car vibration. Faulty Spark Plugs: Spark plugs are well-known wear-and-tear components with a limited lifespan. For example, standard copper-core spark plugs last about 30,000 kilometers, platinum spark plugs can last up to 80,000 kilometers, and iridium spark plugs may last 100,000 kilometers with proper use. However, even if a spark plug hasn't reached its expected lifespan, it can still fail and cause misfiring. Faulty Ignition Coils and Cylinder Wires: Each cylinder's spark plug is connected to an ignition coil and cylinder wire. If these components fail, the spark plug won't fire, and the cylinder won't operate, resulting in misfiring symptoms.

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Which domestic car brand has the lowest fuel consumption?

Among domestic cars, the Roewe i6 hybrid has the lowest fuel consumption at 1.5 liters per 100 kilometers. However, actual fuel consumption is influenced by multiple factors including load, road conditions, driving habits, weather, wind speed, and tire pressure. Methods to determine fuel consumption: You can check fuel consumption through the car's dashboard, where F=full and E=empty. When the fuel warning light comes on, record the mileage, then note how much fuel is added. When the fuel is next depleted, record the mileage again. Subtract the initial mileage from the current mileage, then divide by the amount of fuel used to calculate the fuel consumption. Factors affecting fuel consumption: While engine displacement and fuel consumption are somewhat related, higher fuel consumption doesn't necessarily mean larger displacement. Relatively speaking, a car's displacement doesn't directly correlate with fuel consumption. Besides displacement, factors like the car's shape, weight, and engine technology also significantly impact fuel efficiency. Among vehicles with the same displacement, those with more advanced engine technology tend to be more fuel-efficient.

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Is driving at 68 km/h on a national highway with a speed limit of 60 km/h considered speeding?

Driving at 68 km/h on a national highway with a speed limit of 60 km/h does not constitute speeding. Penalties on highways: If the speeding does not exceed 10% of the speed limit, no penalty will be imposed, and only a reminder will be given to the driver. For speeding exceeding 10% but not exceeding 20%, it is considered a minor offense, resulting in a 3-point deduction and a fine. For speeding exceeding 20% but not exceeding 50%, it is considered a more serious offense, and if caught, it will result in a 6-point deduction and a fine. Actual vehicle conditions: During the driving process, vehicles are not measured for speed based on wind speed or high-tech methods like GPS. Instead, the simplest method is used: counting the number of wheel rotations. By calculating the number of wheel rotations per second and combining it with the wheel's circumference, the actual distance traveled by the vehicle can be determined. Through the vehicle system's analysis and calculation, the speed can be directly displayed on the dashboard. From this perspective, even if the dashboard shows 68 km/h, the actual speed might only be 65 km/h or lower. Therefore, the result captured by traffic cameras might only show 65 km/h.

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What Does a Car's Automatic Following System Rely on for Detection?

What is the fuel consumption of a new Mazda Axela?

What Causes Steering Wheel Vibration at Speeds Over 120 km/h?

What is the issue with the DC-DC failure in new energy vehicles?

What Causes a Car to Misfire?

Which domestic car brand has the lowest fuel consumption?

Is driving at 68 km/h on a national highway with a speed limit of 60 km/h considered speeding?

How to Tell if Brake Pads Are Worn Thin?

Why isn't the first maintenance for motorcycles free?

Can vehicle inspection be done on Saturdays?

Is Pulling Up the Handbrake Considered Parking?