What is the meaning of the Dongfeng Citroën logo?

What does D/S gear mean?

D gear, in a car, means the drive gear and is the most commonly used gear while driving. Since the advent of automatic transmission models, the D gear has existed. S gear is actually the abbreviation of the English word "SPORT," meaning sport, and it is the sport mode of the D gear. Many car models have added the S mode to enhance the vehicle's sportiness and playability. Below are the relevant introductions: 1. D gear: For the vehicle, the D gear is also the most economical gear. In D gear, the throttle and engine response are relatively gentle, and the gear shifts are more comfortable. All settings of the D gear are focused on fuel efficiency and comfort. 2. S gear: Both S gear and D gear are forward gears, but in S gear, the engine's power output becomes more aggressive. At the same time, the throttle becomes more sensitive, and the transmission delays shifting. The RPM increases, acceleration becomes faster, and the vehicle's power performance is further enhanced. Compared to D gear, S gear is more suitable for car owners who pursue driving pleasure. 3. When to use S gear: S gear is generally used for overtaking or climbing slopes, and it can also be used during the acceleration phase when entering the highway to help speed up. Of course, many car owners who want to experience an intense driving style in daily life can also engage S gear to feel the surging power output.

7

3

Share

How to Choose Engine Oil Viscosity?

Factors for choosing engine oil viscosity: 1. Based on vehicle series: Japanese/Korean and American cars: Generally choose 30 viscosity oil (0W-30/5W-30, etc.); German cars: Recommended to use 40 viscosity oil (0W-40/5W-40, etc.). 2. Based on load conditions: If the vehicle operates under high load and low RPM conditions, it's generally advisable to use lubricating oil with higher viscosity. For light load and high RPM conditions, lubricating oil with lower viscosity is usually preferred. 3. Based on engine wear condition: Depending on the vehicle's wear status, older vehicles with over 100,000 kilometers typically need to adjust oil viscosity compared to new cars. Due to increased component gaps caused by wear, higher viscosity oil is required to form a good protective oil film. If the engine has undergone major repairs, it's also necessary to increase the viscosity of the lubricating oil used. 4. Based on local real-time temperature: In northern winters, it's advisable to choose oil with better low-temperature fluidity, such as 0W/5W oil, to ensure normal cold starts for your vehicle.

2

5

Share

Should You Shift to N or P Gear at a Red Light?

Shifting to N gear at a red light and applying the handbrake can be relatively more fuel-efficient. This is because the passive wheel in the torque converter of the transmission is idling in this state, which does not increase the resistance of the active wheel connected to the engine. Without additional load, fuel consumption naturally does not increase. Relevant details are as follows: 1. It is not recommended to shift to P gear while waiting at a red light because when the vehicle is parked in P gear, a hook in the transmission locks onto the gear, creating mutual force between them. Over time, this can exacerbate wear and tear on the transmission. 2. Avoid common misconceptions when using automatic transmission vehicles: Do not keep the car in D gear for prolonged periods while parked. In traffic jams, some drivers of vehicles with automatic transmissions often only press the brake pedal while keeping the gear lever in D (drive gear) without shifting. If the stop is brief, this is acceptable. However, for longer stops, it is best to shift to N gear and engage the parking brake firmly.

10

2

Share

What is the difference between L gear and S gear?

L (LOW) gear is the low-speed gear, which provides high torque at low speed and limits the engine to lower RPM to obtain sufficient power. S (Sport) gear is the sport mode, which can be simply understood as a high-speed gear. It allows the car to run at high RPM in lower gears for an extended period, thereby achieving greater torque output and acceleration. Below are the relevant introductions: 1. Usage of L gear: (1) When going downhill, engaging L gear will limit the gear to a low gear (usually first gear), allowing full use of the transmission's engine braking to control the vehicle speed, reduce the burden on the brakes, minimize the risk of brake fade, and improve driving safety. For models without an L gear, manual mode can be used for downhill driving if available. (2) When climbing a steep slope, L gear can be selected to limit the vehicle to low gear operation, preventing frequent gear shifts. This makes the vehicle more powerful when climbing and also protects the transmission. 2. Usage of S gear: Due to its strong power, S gear is generally used when overtaking or climbing. After completing the action, it is recommended to switch back to the more economical D gear, as S gear mode consumes significantly more fuel than normal mode due to increased fuel injection at high RPM. It also tends to wear the transmission more, so it is not necessary for daily driving.

12

5

Share

Why does the resonance disappear when accelerating at idle?

The reasons why engine vibration at idle disappears when accelerating are: 1. Changes in fuel injection quantity cause the engine speed to fluctuate; 2. Faulty fuel pump pressure regulator or sensor leads to incorrect fuel injection correction signals; 3. Cracked vacuum booster pipe; 4. Carbon buildup or dirt on the throttle body, or incorrect position of the throttle position sensor. Additional information: An engine (Engine) is a machine capable of converting other forms of energy into mechanical energy, including internal combustion engines (reciprocating piston engines), external combustion engines (Stirling engines, steam engines, etc.), jet engines, electric motors, etc. The term engine can refer to either the power generation device or the entire machine including the power unit.

12

3

Share

How to Solve Throttle Sticking?

Throttle sticking may be caused by the throttle opening screw being too tight or insufficient lubrication of internal components. You can first adjust the throttle opening screw, then add some engine oil to lubricate the throttle spring and internal parts. The engine throttle is a crucial component in modern fuel-injected engine systems. The upper part connects to the air filter, while the lower part links to the engine cylinder block, serving as the throat of the automobile engine. The responsiveness of vehicle acceleration is closely related to the cleanliness of the throttle. To ensure the throttle can open and close normally, it should be inspected promptly. A good method to detect throttle issues is to press the accelerator pedal and observe whether the throttle can stand upright. If any problems are found, it's essential to visit a 4S shop for repairs immediately.

6

0

Share

What is the meaning of the Dongfeng Citroën logo?

What does D/S gear mean?

How to Choose Engine Oil Viscosity?

Should You Shift to N or P Gear at a Red Light?

What is the difference between L gear and S gear?

Why does the resonance disappear when accelerating at idle?

How to Solve Throttle Sticking?

How Long Does It Take to Apply a Full Car Wrap?

What Causes the Electric Power Steering Wheel to Become Heavy?

What are the symptoms of insufficient clutch fluid?

What Does the First Car Maintenance Include?