How to use HiCar in BYD Han?

What are the disadvantages of adding too much refrigeration oil?

The disadvantages of adding too much refrigeration oil are as follows: 1. Refrigeration oil generally exists in liquid form in the air conditioning system and has a certain solubility with the refrigerant. Since the thermal conductivity of refrigeration oil is worse than that of the refrigerant, when the refrigerant dissolves refrigeration oil, it will hinder heat exchange between the refrigerant and the condenser pipes in the condensation section, forming a noticeable temperature gradient. The more refrigeration oil dissolved in the refrigerant, the worse its heat exchange capability, leading to deteriorated condensation heat dissipation. 2. When the refrigerant containing refrigeration oil is injected into the evaporator through the throttling device, most of the refrigerant will evaporate strongly into a gaseous state, while the refrigeration oil will exist as small droplets or mist. When the cooling capacity is fixed, the more refrigeration oil there is, the more cooling capacity is used to lower the temperature of the refrigeration oil, leaving less cooling capacity for heat exchange with the evaporator to cool the cabin space. 3. When the amount of refrigeration oil is excessive and cannot be carried back to the compressor by the refrigerant vapor, the excess refrigeration oil will adhere to the evaporator and related pipe walls, forming a thermal resistance that hinders heat exchange. 4. Excessive refrigeration oil can also accumulate at the lowest points of the pipeline, increasing the flow resistance of the refrigerant and reducing its circulation volume. 5. Too much refrigeration oil in the cylinder can reduce the volumetric efficiency of the compression chamber (the excess oil occupies the volume of the refrigerant vapor, reducing the circulation volume of the refrigerant). This reduction in circulation volume can significantly lower the air conditioning cooling capacity, which is the most significant factor affecting the performance of the air conditioning system due to refrigeration oil.

6

1

Share

What Are the Reasons for the Engine Light to Illuminate?

Reasons for the engine light on the car dashboard to illuminate: When the battery is dead, not only does the battery indicator light up, but the engine fault light will also illuminate. Newly purchased cars that are not maintained according to regulations will cause the engine fault light to come on. When the engine oil is insufficient, the engine oil indicator light will illuminate, and the engine fault light will also come on. Lack of various fluids such as antifreeze, brake fluid, power steering fluid, etc., will generally cause the engine fault light to illuminate. Sometimes there may be no actual car issues, but the electronic system gives a false alarm, or the fault light remains on due to a previous issue (e.g., missing something) that was fixed but the fault code was not cleared. If the engine fault light is on, it does not necessarily mean the engine cannot operate. First, when the fault light is on, it needs to be checked and repaired. If you happen to be near a repair shop, you can have it checked immediately. It is best to inspect it right away. If you are far from a repair shop and do not have time to go for an inspection, as long as you feel there are no obvious engine issues, you can proceed with your tasks. When the engine fault light is on, if there are no obvious faults, driving cautiously at low speed is usually sufficient. There might be minor issues or no issues at all. However, if the engine exhibits obvious faults, such as severe abnormal noises, significant vibrations, or smoke coming from the engine, do not drive the car. It is best to contact a repair shop and wait for assistance.

8

1

Share

What are the differences between Toyota Reiz 2.5S and 2.5V?

The differences between Toyota Reiz 2.5S and 2.5V are as follows: Different sunroof configurations: 2.5S does not have a sunroof, while 2.5V is equipped with an electronically controlled power sunroof. Additionally, the 2.5V features rear and rear-seat windows with light-tinted privacy glass, xenon headlights (with automatic leveling and headlight washers), aluminum accelerator, brake, and footrest pedals, stainless steel door sills (with vehicle name logo), large roof lighting system, 8-way power-adjustable front seats (driver's seat with power lumbar support), steering wheel with control buttons, cruise control system, and leather seats. Different seat adjustment methods: 2.5S uses manual mechanical adjustment, while 2.5V features electronic power adjustment. Different heating methods: 2.5S uses an air conditioning heating system, while 2.5V is additionally equipped with heated front seats for both the driver and passenger. Different prices: Compared to the 2.5S, the Reiz 2.5V has a higher price and more advanced configurations. The 2013 Reiz 2.5S Jingrui Edition has dimensions of 4750*1795*1450 (L*W*H in mm), a 2.5L 193HP V6 engine, a 4-door 5-seater sedan body, a maximum torque of 236 N·m, and a 6-speed automatic transmission. The 2013 Reiz 2.5V comes in five versions: Shangrui Edition, Navigation Edition, Zunrui Navigation Edition, Jingrui Edition, and Shangrui Navigation Edition. All versions have dimensions of 4750*1795*1450 (L*W*H in mm), a 2.5L 193HP V6 engine, a 4-door 5-seater sedan body, a maximum torque of 236 N·m, and a 6-speed automatic transmission.

7

0

Share

What are the major maintenance items for a vehicle at 40,000 kilometers?

The major maintenance items for a vehicle at 40,000 kilometers are as follows: 1. Spark plugs. It is recommended to replace them every 40,000 kilometers. After 40,000 kilometers, the ignition efficiency of spark plugs generally decreases, which can increase fuel consumption, cause carbon buildup, and reduce power. It also increases the risk of damage to the oxygen sensor and catalytic converter. 2. Fuel filter. Most vehicle fuel filters are located outside the fuel tank. Since gasoline contains impurities, it is advisable to replace the fuel filter every 40,000 kilometers. Do not wait until the filter is clogged, causing the vehicle to stall and leave you stranded on the road, before thinking about replacement. 3. Coolant. Coolant has anti-freeze, anti-corrosion, and anti-boil functions. Generally, its effective period is three years. If you have driven 60,000 kilometers within three years, it is recommended to replace the coolant. Expired coolant can corrode the engine's water channels, water pump, and radiator. 4. Transmission fluid. For newer Nissan models, except for CVT and manual transmissions, it is recommended to replace the transmission fluid and transmission filter at 40,000 kilometers. 5. Brake fluid and power steering fluid. Brake fluid is hygroscopic and can easily form vapor locks under special conditions, leading to reduced braking efficiency. Its effective period is two years. If you have driven 40,000 kilometers within two years, it must be replaced. A few older Nissan models with power steering pumps require power steering fluid replacement. Newer Nissan models use electronic steering systems. 6. Cabin air filter. When there is an unpleasant odor from the air conditioning vents, it is time to replace the cabin air filter. At 40,000 kilometers, the cabin air filter should be replaced as well. If possible, check the cabin air filter for dirt and clogging during every minor maintenance and replace it promptly if necessary.

3

4

Share

What Causes the Abnormal Noise When Turning on the Car Air Conditioning?

Reasons for abnormal noise when turning on the car air conditioning include excessively high pressure in the high-pressure pipe of the air conditioning system, dirty condenser, poor heat dissipation, blocked expansion valve, and high pressure in the pipes. Key points for air conditioning fault inspection: Observe the working conditions of the indoor and outdoor units: For example, check the display status of the indicator panel, whether the indoor unit is working, whether the fan speed output is normal, and whether the outdoor fan and compressor are running to determine whether the issue is electrical or system-related causing the lack of cooling. Measure various data of the air conditioner: Such as water leakage from the air conditioner, the temperature difference between the air inlet and outlet (the normal temperature difference should be 12-14 degrees). However, due to environmental humidity and temperature influences, the data can only serve as a reference value. Diagnosing air conditioning faults: Refrigeration system: Inspect each pipeline of the refrigeration system for cracks, damage, frost, or condensation. Check for any contact or friction between refrigeration pipelines or between pipelines and the casing, especially at the welding points of the refrigerant pipelines and connection joints for leaks. Any leakage point will have oil stains. You can also use a clean soft cloth or paper to wipe the welding points and connection joints to check for oil stains to determine if there is a leak. Electrical system: Check if the fuse in the electrical system has blown, whether the insulation of electrical wires is intact, whether the circuit board is broken, or if connections are loose. Pay special attention to whether electrical connections are secure, as screws and connectors can easily become loose, leading to poor contact. Ventilation system: Observe whether the air filter, heat exchanger coils, and fins are excessively dusty; check if the air inlet and outlet are unobstructed; ensure the fan and blades are functioning normally; and verify whether the airflow is normal.

8

4

Share

Which country does the 15c4e car engine belong to?

15c4e car engine is a Chinese engine, independently developed and produced by SAIC-GM. The 1.5T version of the Roewe i5 is equipped with the 15c4e engine, which has a maximum power of 124 kW and a maximum torque of 250 Nm. Here are some maintenance methods for the 15c4e engine in daily use: Use lubricating oil of the appropriate quality grade. For gasoline engines, select SD--SF grade gasoline engine oil based on the additional devices in the intake and exhaust systems and usage conditions; for diesel engines, choose CB--CD grade diesel engine oil according to the mechanical load, with the selection standard not lower than the manufacturer's requirements; Regularly change the engine oil and filter. The quality of any grade of lubricating oil will change during use. After a certain mileage, its performance deteriorates, which can cause various problems for the engine. To avoid failures, change the oil regularly based on usage conditions and keep the oil level moderate; When the oil passes through the fine pores of the filter, solid particles and viscous substances in the oil accumulate in the filter. If the filter is clogged and the oil cannot pass through the filter element, it may rupture the filter element or open the safety valve, allowing the oil to bypass through the bypass valve and carry contaminants back to the lubrication parts, accelerating engine wear and increasing internal pollution; Regularly clean the crankcase. During engine operation, high-pressure unburned gases, acids, moisture, sulfur, and nitrogen oxides from the combustion chamber enter the crankcase through the gap between the piston rings and cylinder walls, mixing with metal powder from part wear to form sludge. When the amount is small, it remains suspended in the oil; when large, it precipitates from the oil, clogging filters and oil holes, making engine lubrication difficult and causing wear; Regularly use a radiator cleaner to clean the radiator. Removing rust and scale not only ensures the engine operates normally but also extends the overall lifespan of the radiator and engine.

19

2

Share

How to use HiCar in BYD Han?

What are the disadvantages of adding too much refrigeration oil?

What Are the Reasons for the Engine Light to Illuminate?

What are the differences between Toyota Reiz 2.5S and 2.5V?

What are the major maintenance items for a vehicle at 40,000 kilometers?

What Causes the Abnormal Noise When Turning on the Car Air Conditioning?

Which country does the 15c4e car engine belong to?

Is the annual inspection due on the 1st or 30th of June?

Do You Need to Obey Traffic Lights When Turning Right?

What is the normal tire pressure for the Fista?

How to Align the Timing Belt on a Ford Focus?