What to Do When the Green Light on the Chezhihui Smart Box is On?

Why don't small cars need grease lubrication?

Small cars do not require grease lubrication for the following reasons: Changes in wheel bearing structure: Previously, wheel bearings on small cars were open, making grease prone to leakage. Without grease fittings, regular maintenance and grease replenishment were necessary. Modern passenger cars have redesigned wheel bearing structures with pre-packed grease that is less likely to leak. These bearings are now one-time-use components that cannot be regreased. Changes in universal joint structure: In the past, universal joints on small cars were open and equipped with grease fittings, requiring regular grease replenishment. Modern versions feature dust covers containing lubricating grease, eliminating the need for maintenance as long as the dust cover remains intact.

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What is the difference between a starter and an engine?

The main differences between a starter and an engine are: 1. Different energy sources. The starter relies on electricity, converting electrical energy into mechanical energy. The engine relies on fuel, converting internal energy into mechanical energy. 2. Different structures. The starter mainly consists of an electric motor composed of a magnetic field, armature, and commutator. The engine mainly consists of the engine block assembly, including components such as the cylinder block, cylinder liner, cylinder head, and cylinder gasket. Additional information: The relationship between the two is mainly reflected in automobiles. When starting a car, the key is turned to ignite, activating the starter, which then drives the engine to work. Only then can the engine continue to operate continuously through its own combustion, i.e., power inertia.

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How to Test if an Oxygen Sensor is Good or Bad?

Methods to test the condition of an oxygen sensor are: 1. Use a multimeter to check the resistance of the oxygen sensor (between the heater terminal and the ground terminal), which is generally between 4 to 40 ohms. 2. Measure its feedback voltage by connecting two wires from the oxygen sensor, then plugging back the connector and measuring the feedback voltage. The number of voltage changes within 10 seconds should generally exceed 8 times. 3. Observe the color of the oxygen sensor. Typically, the tip of the oxygen sensor is light gray in color. White, black, or brown colors indicate abnormalities. The function of the oxygen sensor is to determine whether there is excess oxygen in the exhaust gas after engine combustion, i.e., the oxygen content, and convert the oxygen content into a voltage signal transmitted to the engine computer, enabling the engine to achieve closed-loop control targeting the excess air factor.

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Is the Crankcase Sealed?

The crankcase is sealed. Front and rear crankshaft seals: The front and rear crankshaft seals in an engine are designed to maintain the internal working pressure and prevent leakage of lubricating oil. Sealing is achieved by installing oil seals on the bearing outer sleeves at both ends of the crankshaft, with sealant applied for additional protection. Impact on crankshaft rotation: To prevent oil leakage and external dust ingress, steel-cored rubber annular sealing rings are typically used. The outer ring features a steel core that's press-fitted into the cylinder block's seal ring seat, remaining stationary. The inner ring is elastic and contains a fine spring within the seal, utilizing its elasticity to press against the crankshaft journal, separating internal and external spaces while allowing unimpeded crankshaft rotation.

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Does Rear-Wheel Drive Cause Understeer?

Rear-wheel drive can cause understeer. Understeer: Understeer refers to insufficient steering response, a term often used by car reviewers and frequently associated with front-wheel-drive family cars. Over time, this has created the impression that front-wheel-drive cars always understeer. In reality, understeer is not exclusive to front-wheel-drive vehicles; rear-wheel-drive models can also experience it. Oversteer: Due to the rearward weight distribution in rear-wheel-drive cars, the rear tires are more likely to reach the maximum static friction between the tire and the road surface first. When the required centripetal force for the rear wheels exceeds this maximum static friction and the front wheels have not yet reached their limit, the rear wheels undergo centrifugal motion, resulting in a skid. Meanwhile, the front wheels continue to operate normally, causing the oversteer phenomenon.

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What is the composition of coolant?

The main components of coolant are: water, antifreeze, and additives. Depending on the freezing point, the mixing ratio of these three materials varies. Coolants can be alcohol-based, glycerol-based, or ethylene glycol-based. When adding coolant, it is important to note that different brands, models, and manufacturers should not be mixed. The functions of coolant are: 1. To prevent the coolant from freezing in cold seasons when the vehicle is parked, which could cause the radiator to crack and the engine cylinder block to freeze; 2. To prevent corrosion of metal parts and aging of rubber components; 3. To reduce the formation of scale, which could block the circulation pipes and affect the cooling system's heat dissipation function; 4. To prevent the engine water temperature from becoming too high, ensuring the engine operates at the correct working temperature; 5. To provide lubrication for the water pump thermostat and other components.

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What to Do When the Green Light on the Chezhihui Smart Box is On?

Why don't small cars need grease lubrication?

What is the difference between a starter and an engine?

How to Test if an Oxygen Sensor is Good or Bad?

Is the Crankcase Sealed?

Does Rear-Wheel Drive Cause Understeer?

What is the composition of coolant?

Where is the radiator located in a Ford Focus?

Should CRV use 5W30 or 0W20 oil?

How Many Classes Are Small Cars Divided Into?

Is the FAW Jetta VS5 a joint venture car?