What Does Carbon Deposit Mean?

1 Answers
Eugene
07/29/25 5:23pm
Carbon deposit refers to: 1. Engine carbon deposit: During engine operation, unsaturated olefins and gums in fuel produce a coking-like substance under high-temperature conditions; 2. Carbon deposit in electrical discharge machining: Carbon deposition should be strictly avoided in EDM processes, especially in precision mold manufacturing where it can be fatal. Carbon deposit is an abnormal manifestation in spark erosion machining. The source of engine power is the air-fuel mixture, which must enter the combustion chamber through the intake valve. A small portion of gasoline adheres to the intake valve and, when exposed to engine heat, the unburned hydrocarbons, paraffin, and gums in gasoline form sticky carbon deposits. If the fuel injector has fouling, the atomization of injected gasoline deteriorates, leading to uneven mixing with air and increasing gasoline accumulation on intake valves.
Was this review help?
16
3
Share
More Forum Discussions

What is the function of an automotive air conditioning throttle valve?

Throttling device (also known as a throttle valve in refrigeration systems) is a flow device installed within a pipe filled with fluid. The flow stream forms a local contraction at the throttling point, thereby increasing flow velocity and reducing static pressure, which serves the purpose of cooling and pressure reduction. 1. Introduction: Automotive air conditioning refers to the air conditioning equipment installed in vehicles. 2. Function: It can cool, heat, ventilate, and purify the air inside the vehicle compartment, providing a comfortable environment for passengers, reducing driver fatigue, and enhancing driving safety. The air conditioning system has become one of the indicators for measuring whether a vehicle is fully equipped. 3. Components: Generally includes refrigeration units, heating units, and ventilation units. This combined system makes full use of the limited interior space of the vehicle, featuring a simple structure and ease of operation, making it a popular modern automotive air conditioning system internationally.
15
0
Share

What are the five major automobile manufacturers in Liuzhou?

The five major automobile manufacturers in Liuzhou include China FAW Group, Dongfeng Motor Corporation, SAIC Motor Corporation Limited, Dongfeng Liuzhou Motor Co., Ltd., and SAIC-GM-Wuling Automobile Co., Ltd. Below is relevant information: 1. China FAW Group: China FAW Group Corporation, abbreviated as 'China FAW' or 'FAW', with the English brand logo FAW, which stands for First Automobile Works. It is a large state-owned automobile manufacturer directly under the central government, formerly known as First Automobile Works, with its name inscribed by Chairman Mao Zedong. 2. Dongfeng Motor Corporation: The Second Automobile Works, also known as 'Dongfeng'. It began construction in 1969 in Shiyan City, Hubei Province, producing 'Dongfeng' trucks, 'Fukang' sedans, and later 'Elysee' sedans. Originally under the direct management of the State Council, it was renamed Dongfeng Motor Corporation in the 1990s.
15
2
Share

Do You Need to Bleed the Entire Brake System When Replacing a Brake Caliper?

No, bleeding the entire system is not necessary. The working principle of the brake master cylinder is that when the brake pedal is pressed, the piston inside the master cylinder is pushed by the brake pedal, and then the push rod comes into play. Here are the relevant introductions: Hydraulic Brake Master Cylinder: The hydraulic brake master cylinder transmits brake fluid through the brake lines to the pistons of each brake caliper, causing the brake pads to create friction with the inner surface of the brake drum, thereby achieving the braking effect. Pneumatic Brake Master Cylinder: The working principle of the pneumatic brake master cylinder is to act as a valve. The difference is that after braking, the hydraulic master cylinder controls the brake fluid to flow back to the reservoir. Vehicles equipped with air brakes usually have large air storage tanks, and after braking, the air is directly discharged. This explains why the exhaust sound of large trucks is so loud.
12
2
Share

What is the maintenance cycle for a scooter?

Replace the engine oil at 300, 800, and 1500 kilometers respectively, and change the oil filter each time you replace the oil. If there is no filter but only a filter screen, clean the filter screen. At 800 kilometers, you can also replace the air filter and the gear oil in the gearbox. After that, replace the air filter every 2,000-3,000 kilometers. Replace the gear oil every 5,000 kilometers. Additional information: 1. Introduction: Scooters are basically equipped with continuously variable transmissions and automatic clutches, similar to electric bikes. They have no gear design—you just twist the throttle to start and release it to gradually slow down and stop. Additionally, scooter wheels are smaller than those of other motorcycles, and the transmission is mostly belt-driven, commonly referred to as "step-through" or "underbone" motorcycles. 2. Components: A moped includes a frame, front wheel, rear wheel, a bottom bracket set at the base of the frame, and an engine. The moped frame is composed of interconnected hollow tubes containing fuel oil.
15
3
Share

Is the Acceleration Noise in Chery A3 from the Transmission or Elsewhere?

Chery A3 acceleration noise is from the transmission. Failure to repair the transmission in time after water ingress or prolonged neglect in changing the automatic transmission fluid can lead to transmission noise. Transmission noises generally include torque converter noise, oil pump noise, planetary gear noise, and differential noise. It is essential to inspect and repair promptly when such noises occur. Common causes of transmission noise: 1. Failure to repair the transmission in time after water ingress can trigger a series of automatic transmission failures, such as oil leaks, noise, and impact issues. 2. Prolonged neglect in changing the automatic transmission fluid causes the fluid to thicken. Over time, it loses its effectiveness, resulting in direct friction between components without a protective layer, which exacerbates mechanical wear. In severe cases, it can damage automatic transmission components like the planetary gear carrier and differential, leading to noise. 3. The use of inferior transmission fluid, which is of low quality or counterfeit, has poor temperature resistance and is prone to oxidation, forming sludge and residue that clogs the automatic transmission filter and lubrication channels. This increases friction among internal components, causing noise issues.
19
1
Share

What is the name of the store that sells cars?

Selling cars is called a 4S store. The full name of a 4S store is Automobile Sales Service Shop 4S, which is a car sales enterprise integrating four functions: vehicle sales (Sale), spare parts (Sparepart), after-sales service (Service), and information feedback (Survey). A 4S store is invested and built by dealers according to the standards set by car manufacturers, with unified design inside and outside the store, huge investments often amounting to tens of millions, luxurious and grand appearance, and a comfortable environment. It can only sell single-brand cars specially authorized by the manufacturer, providing customers with lower prices, more professional technical support, and more in-depth after-sales services. 4S stores and car manufacturers together form a car brand alliance, representing the brand culture, reflecting brand value, maintaining brand loyalty, and establishing the brand's reputation and credibility for the manufacturer. Typically, a brand's 4S stores are distributed only one or a few relatively equidistant stores in a region, and sales cannot cross regions between stores.
9
4
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.