What is the emission standard for exhaust pollutants from automotive gasoline engines?

Should a Land Rover use 92 or 95 octane gasoline?

Land Rover can use 95 octane gasoline. This fuel grade is recommended in the vehicle's official owner's manual. In addition to checking the appropriate fuel grade in the owner's manual, Land Rover vehicles also indicate the recommended fuel grade on the fuel tank cap. Typically, the fuel grade can also be determined based on the engine's compression ratio. Vehicles with a compression ratio between 8.6-9.9 should use 92 octane gasoline, while those with a compression ratio between 10.0-11.5 should use 95 octane gasoline. If the compression ratio is higher, 98 octane gasoline is recommended. However, with the use of some new technologies, the fuel grade cannot be determined solely based on the compression ratio. High compression ratio engines can also be tuned to use lower octane fuel because factors other than the compression ratio, such as ignition timing, turbocharging technology, and Atkinson cycle technology, also play a role. Generally, the higher the fuel octane number, the higher the octane rating and the better the anti-knock performance. 92 octane gasoline contains 92% isooctane and 8% n-heptane, while 95 octane gasoline contains 95% isooctane and 5% n-heptane. If a Land Rover occasionally uses the wrong fuel grade, simply switch back to the correct grade after the current tank is used up. However, prolonged use of the wrong fuel grade can have the following effects: For vehicles that recommend a lower octane fuel, using a higher octane fuel will not cause damage, but the increase in octane rating can change the fuel's ignition point, leading to delayed combustion in the engine. This means both the engine's power output and thermal efficiency will decrease, resulting in poorer performance. For vehicles that recommend a higher octane fuel, using a lower octane fuel can cause engine knocking. Because the octane rating is too low, the fuel's ignition point decreases and it may ignite prematurely during the compression stroke. If the fuel ignites before the spark plug fires during the compression stroke, resistance will occur during the upward stroke. This resistance makes the engine run very unstable. If the knocking is mild, it may only increase noise without significant damage to the engine. However, if the knocking is severe, it indicates serious engine conditions. The vibrations not only affect driving stability but can also cause abnormal wear on the pistons and cylinders, and in severe cases, even cylinder scoring.

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What does ECON mean?

The ECON mode in car air conditioning is actually an operating mode of the air conditioning system. ECON only takes effect when the air conditioning cooling is turned on. Since the air conditioning compressor is driven by the engine and can consume up to 20% of the engine's power, enabling ECON mode will reduce the air conditioning power while maintaining cooling performance, thereby achieving fuel-saving effects. The method to activate the air conditioning economy mode is very simple: after turning on the air conditioning, the driver just needs to press the "ECON" button. When the button light illuminates, the cooling system turns off while natural air or heating continues operating. Introduction about car air conditioning ECON mode: Normally, the A/C indicator in cars represents air conditioning on/off status, while ECON only functions when cooling is activated, indicating the economic mode of air conditioning. In this mode, the compressor still operates but with adjusted parameters. Compared to normal mode, the compressor's control point increases, and it doesn't remain constantly engaged. The compressor's start/stop points are controlled by evaporation temperature. In normal mode, the compressor activates at 2~4°C. Under ECON mode, this range increases to 8~10°C. Lower temperatures require longer compressor operation time and workload. Enabling ECON mode saves engine power output and reduces fuel consumption. Functions of car air conditioning: Achieves cooling effect through continuous refrigerant cycle; Removes dust, odors, smoke and toxic gases from cabin air, improving air quality while humidifying to increase relative humidity; Utilizes engine coolant, waste heat or burner-generated heat as warming source. After heater processing, air is blown into cabin by blower to raise outlet temperature for heating purposes; Introduces external fresh air for ventilation, which also effectively prevents windshield fogging. Precautions for using car air conditioning: Avoid excessively low temperature settings. Large indoor-outdoor temperature differences may cause driver colds, while extreme cold could lead to arthritis risks for passengers. Adjust air vent direction. Following the principle that cold air sinks and warm air rises: set vents upward when cooling and downward when heating. Don't immediately turn on AC after sun exposure. When the car has been parked under strong sunlight, first open windows for ventilation before activating air conditioning after heat dissipation.

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Is it necessary to display the vehicle inspection exemption label on the car?

Nowadays, the vehicle inspection label has been digitized and does not need to be displayed on the car. Here is the relevant information: 1. Vehicle inspection: It refers to a mandatory test for every vehicle that has obtained an official license plate and registration certificate, equivalent to an annual physical examination for the vehicle according to the 'Technical Conditions for Motor Vehicle Operation Safety'. Vehicle inspection can promptly eliminate potential safety hazards, encourage enhanced vehicle maintenance, and reduce the occurrence of traffic accidents. 2. Required documents: Original and photocopy of the 'Resident ID Card', original and photocopy of the 'Motor Vehicle Registration Certificate'; and the application form for the motor vehicle inspection label.

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What does the code on the car dashboard mean?

Car dashboard code indicates that there is a fault in the vehicle, and the specific fault needs to be determined by connecting to diagnostic equipment. Depending on the vehicle model configuration, some models' driver information centers cannot display Chinese information, and vehicle information will be displayed as code to indicate the fault. The car code is used by the vehicle detection chip. If the chip cannot be detected, the dashboard light will illuminate. When this indicator is lit, the vehicle cannot be started, and multiple ignition attempts may lock the engine, commonly known as engine immobilizer. For vehicles equipped with an engine immobilizer system, even if a thief can open the door, they cannot drive the car away.

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What does the automotive ECU mean?

Automotive ECU stands for Engine Control Unit, also known as Electronic Control Unit, commonly referred to as the car computer or onboard computer. The ECU can be considered one of the core electronic components in modern vehicles. The ECU in a car is analogous to the human brain or a computer's CPU. Essentially, the ECU serves as the central nervous system of the automobile, typically installed beneath the dashboard on the driver's side or near the wiper linkage. Its function is to continuously monitor various input data and the operational states of the vehicle. It processes information from multiple sensors according to pre-programmed algorithms and then sends commands to relevant actuators to perform predetermined control functions.

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What is the car hold function?

The car hold function is a holding mode. After pressing this button, its function is to keep the vehicle in a specific gear range, while the holding mode indicator light on the dashboard illuminates. Pressing the hold button again restores the transmission to the normal automatic shifting mode, and the holding mode indicator light on the dashboard turns off. The functions of the hold mode are: 1. Smoother starting; 2. No need for frequent gear shifting, allowing the transmission to continuously output greater torque, improving acceleration performance and ensuring smoother driving; 3. When going downhill, it provides greater resistance for safer driving and avoids wear caused by frequent gear shifting of the transmission.

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What is the emission standard for exhaust pollutants from automotive gasoline engines?

Should a Land Rover use 92 or 95 octane gasoline?

What does ECON mean?

Is it necessary to display the vehicle inspection exemption label on the car?

What does the code on the car dashboard mean?

What does the automotive ECU mean?

What is the car hold function?

What does brake assist mean?

What does 'door' mean on a car?

What does it mean when the STOP light on the dashboard is on?

What does a red light flashing on the windshield indicate?