What are the advantages and disadvantages of gasoline engines and diesel engines? What is the difference between a gasoline engine and a diesel engine? To figure out the difference between them, we must first have a general understanding of gasoline engines and diesel engines.
What is a gasoline engine?
Gasoline engine is also known as an ignition engine. It is an engine that injects gasoline into the intake pipe and mixes with air into a combustible mixture before entering the cylinder. It is ignited and burned by a spark plug to perform work. The gasoline is used as fuel to convert internal energy into kinetic energy.
Gasoline engine advantages:
Gasoline engine has high speed, fast response speed, simple structure, easy start in winter, light weight, low noise, low cost, stable operation, convenient use and maintenance, etc.
Disadvantages of gasoline engine:
Gasoline engine has higher fuel consumption, so the fuel economy is poor, the ignition system is more complicated than diesel engine, the reliability and the convenience of maintenance are not good.
Gasoline Engine Classification:
Gasoline engines are divided into:
EQB: used for truck or passenger car gasoline engines and other gasoline engines working under mild conditions, with certain detergency, dispersion, oxidation resistance and corrosion resistance
EQC: Used for truck or passenger car gasoline engines and other gasoline engines that work under medium conditions, and can also be used for gasoline engines that require SAE J183SC grade oil in foreign countries. It has good detergency, dispersion, oxidation resistance, corrosion resistance and rust resistance. sex
EQD: It is used for gasoline engines of trucks, passenger cars and certain cars that work under harsher conditions, and can meet the gasoline engine oil requirements equipped with a forced crankcase ventilation device, and foreign gasoline engines that require SAE J183SD and SC grade oil. EQC grade oil has better performance
EQE: Used for gasoline engines of cars and certain trucks that work under harsh conditions, and can meet gasoline engines equipped with exhaust gas purification devices and similar foreign gasoline engines that use SAE J183SE, SD and SC grade oils, which are better than EQD grade oils performance
EQF: used in gasoline engines of cars and certain trucks that work under more severe conditions, and also used in gasoline engines that require SAE J183SF, SE, SD and SC grade oils abroad, which has better performance than EQE grade oil
Gasoline engines are divided into fuels:
Can be divided into diesel engine, gasoline engine and natural gas engine, etc.
Gasoline engine is divided into the number of strokes that realize the cycle
1. Four-stroke gasoline engine: The piston moves four strokes or the crankshaft rotates two revolutions to complete a working cycle in the cylinder.
2, two-stroke gasoline engine: the piston moves two strokes or the crankshaft rotates one circle to complete a working cycle in the cylinder.
Gasoline engines are divided into cooling methods:
1. Water-cooled gasoline engine: Use water as the cooling medium.
2. Air-cooled gasoline engine: use air as the cooling medium (suitable for use in water-scarce areas, such as desert countries)
Gasoline engine is divided by ignition method
① Compression ignition gasoline engine: Uses the high temperature generated after the air in the cylinder is compressed to cause the fuel to ignite spontaneously. Such as diesel engines.
② Ignition-type gasoline engine: Use the electric spark from the spark plug to forcibly ignite the fuel, so that the fuel is forcibly ignited and burned. Such as gasoline engine, gas engine.
Gasoline engines are classified according to the method of forming combustible mixture:
1. Gasoline engine with mixed gas of external stroke: fuel and air are mixed first, and then enter the cylinder. Such as a gasoline engine using a carburetor.
2. Internal-stroke mixed gas internal combustion engine: Fuel is injected into the cylinder near the end of compression, and is mixed with air in the cylinder. Such as diesel engines.
Gasoline engine is divided into
1. Naturally aspirated gasoline engine: Air enters the cylinder by the suction effect of the piston.
2. Supercharged gasoline engine: In order to increase the power, a supercharger is installed on the gasoline engine, so that the gas entering the cylinder is compressed by the compressor before entering the cylinder.
Gasoline engines are divided into the number of cylinders:
1, single-cylinder gasoline engine
2, multi-cylinder gasoline engine
Gasoline engines are divided into cylinders according to their arrangement:
1. V-shaped gasoline engine: The center line of the cylinder is in two planes, and the two planes intersect in a V shape.
2. Others: There are H-shaped, X-shaped, star-shaped, etc., but they are rarely used in garden machinery.
3. In-line bedroom gasoline engine: All cylinder center lines are in the same horizontal plane.
4. Opposite gasoline engine: When the V-shaped included angle is 180°, it is also called opposed.
5. In-line vertical gasoline engine: All cylinder center lines are in the same vertical plane.
The working principle of gasoline engine:
The working process of a four-stroke gasoline engine is a complicated process, which consists of four strokes: intake, compression, combustion expansion, and exhaust.
What is a diesel engine?
Diesel engine is also known as Diesel engine. The origin of this name is that diesel engines are compression ignition engines and the inventor is R. Diesel. A diesel engine is an engine that burns diesel oil to obtain energy and release it.
Diesel engine advantages:
High reliability, large torque, good thermal efficiency and high economic performance.
Disadvantages of diesel engine:
The speed is lower than that of gasoline engines (generally the maximum speed is around 2500-3000 rpm), the quality is large, and the manufacturing and maintenance costs are high (because the fuel injection pump and the fuel injector have high processing accuracy requirements).
Diesel engine working principle:
The working process of a diesel engine is actually the same as that of a gasoline engine. Each working cycle also goes through four strokes of intake, compression, work, and exhaust.
Diesel Engine Classification:
is divided into:
Diesel engines for power generation, marine, automotive, agricultural irrigation, engineering machinery and other industrial supporting use
Is divided into:
Single-cylinder diesel engine Multi-cylinder diesel engine, among which multi-cylinder diesel engine is divided into inline type and V-shaped arrangement type according to the different cylinder arrangement;
Is divided into cooling methods:
Air-cooled and water-cooled
Is divided into working cycle process
Two stroke and four stroke
Is divided into:
High speed (rated speed above 1000r/min), medium speed (rated speed within the range of 600~1000r/min) and low speed (rated speed below 600r/min), currently the rated speed of diesel engines supporting diesel generator sets is generally 1500r/min or 3000r/min.
Is divided into:
Spontaneous combustion suction type and pressurized type
Diesel engine development prospects:
Diesel engines are widely used and are at the core of the industry chain. Diesel engines are mainly used for final supporting products. In the field of agricultural diesel engines, the global agricultural diesel engine market will show rapid growth. In the field of aeroengines, the engine industry is the core sub-industry of the aviation industry, and its future development prospects are very broad. Some professionals predict that global diesel engines will maintain a steady growth rate of 8%.