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What is the difference between hybrid electric vehicles and plug-in hybrid electric vehicles?

1 Answers

MacSkylar

07/29/25 9:52am

The differences between hybrid electric vehicles (HEVs) and plug-in hybrid electric vehicles (PHEVs) are: 1. Different charging methods: HEVs do not use a pure electric charging mode; PHEVs can be charged in a pure electric mode. 2. Different power sources: The main power source of HEVs is engine oil, with electricity serving only as an auxiliary function; the power source of PHEVs is the battery. The principle of HEVs is to power the car by simultaneously using the internal combustion engine and the electric motor to drive the vehicle. The principle of PHEVs is to charge the battery pack through plug-in charging, allowing the electric motor and the gasoline engine to drive the vehicle together or in pure electric mode, thereby reducing fuel consumption and air pollution.

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Why do vehicles need to add urea?

Vehicles add urea to meet emission standards, and only diesel vehicles require urea addition. National regulations mandate that electronically controlled diesel engine vehicles must use urea because diesel vehicles emit higher levels of exhaust gases. Adding urea helps reduce carbon oxides in the exhaust, lowering pollutant emissions and making diesel vehicles more environmentally friendly. Currently, most diesel engines employ Selective Catalytic Reduction (SCR) technology. This means that after the engine exhaust exits the turbocharger and before entering the vehicle's exhaust pipe, it must first pass through a catalytic converter for transformation. The urea injector on the exhaust pipe sprays urea under the control of the vehicle's onboard computer.

How to Deal with the Airbag Light On?

Airbag light on can be dealt with by: 1. Turn off the engine; 2. Disconnect the negative terminal of the battery; 3. Wait for 5 to 10 minutes and then reconnect it; 4. Restart the engine. The airbag warning light indicates the working status of the airbag. Under normal circumstances, the indicator light will turn off after the vehicle self-check. If this light is on, it means there is a fault with the airbag, which could be due to the airbag expiring or an electronic circuit malfunction. Airbags are installed in three directions inside the vehicle: front (driver and passenger seats), side (front and rear seats), and roof. The airbag system consists of three parts: the airbag, sensors, and inflator.

What does ESP mean in a car?

ESP in a car stands for Electronic Stability Program. The Electronic Stability Program is a general term for systems or programs that enhance vehicle handling performance while effectively preventing loss of control when the car reaches its dynamic limits. The electronic stability program improves vehicle safety and handling. ESP primarily monitors the driving conditions of the car through sensors. There are three main sensors: the steering angle sensor, wheel speed sensor, and yaw rate sensor. Steering angle sensor: monitors the rotation angle of the car to assist in maintaining the correct driving direction and avoid deviation. Wheel speed sensor: monitors the speed of the wheels to detect any discrepancies, thereby determining if the wheels are slipping. Yaw rate sensor: monitors the car's movement around the vertical axis to determine if the car is skidding.

What is the reason why the car brake cannot be pressed down?

Car brake cannot be pressed down because the vacuum booster pump has failed. After this failure occurs, the vacuum booster pump should be replaced. The car brake system, also known as the car braking system, refers to the special braking mechanism installed on the car to technically ensure safe driving and improve the average speed of the car. The function of the car brake system is: to force the moving car to decelerate or even stop according to the driver's requirements; to keep the parked car stable under various road conditions (including on slopes); to maintain a stable speed for cars driving downhill.

What does the wrench symbol on the Hongqi HS5 dashboard mean?

The appearance of a wrench symbol on the dashboard is actually quite normal - it's the maintenance reminder indicator. Introduction to automotive dashboards: With advancements in electronic technology and the emergence of new sensors and electronic display components, automotive electronic dashboards have been rapidly adopted. Common indicators include fuel level warning light, washer fluid warning light, electronic throttle indicator, front/rear fog light indicators, and warning lights. Function of automotive dashboards: The automotive dashboard serves as a device that reflects the working status of various vehicle systems. It continuously monitors the vehicle's condition and provides drivers with necessary operational parameter information, serving as a crucial interface for information exchange between the driver and the vehicle.

What is the first maintenance mileage requirement for the Hongqi HS5?

The first maintenance requirement for the Hongqi HS5 is 3,000 kilometers. Key items: The main items for the first maintenance of a new car are changing the engine oil and oil filter. Therefore, some dealerships may offer significant discounts to sell the vehicle, but essentially no one would purchase it under such circumstances. Reason: Since the period before the first maintenance is the vehicle's break-in period, the gradually breaking-in engine will continuously mix mechanical impurities such as dust, metal wear, and carbon deposits into the engine oil. Driving at high speeds during this period can lead to abnormal engine wear. If the debris and impurities generated by the engine operation are not promptly removed, they may cause abnormal damage to the internal parts of the cylinders.

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