Real-time freight schedule optimization

List of the contents of this article:

• 1, What do you think of the universal characteristic curve of the engine? High score request
• 2, How to obtain the load characteristics, speed characteristics and universal characteristic curve of the engine
• 3 
  、Gasoline engine universal characteristic curve understanding
• 4. What does the engine characteristic curve mean to the car? How to have an in-depth understanding?

What do you think of the universal characteristic curve of the engine? High score, please ask for advice

1. On the universal characteristic curve, the higher the point load rate, and the highest point (external characteristics) is 100% load. In general, the smaller the load rate, the lower the thermal efficiency of the engine, and the higher the fuel consumption.

2. On the universal characteristic curve, the higher the point load rate, and the load is 100% when it reaches the highest point (external characteristic). Engine ten thousandThe isofuel consumption lines with characteristic curves mainly reflect: the fuel consumption rates under different engine speeds and loads, that is, the curves marked with numbers in circles in the figure below, which are called equal fuel consumption lines.

3. Engine characteristics refer to the law that the performance indicators of the engine change with the adjustment and operating conditions of the engine. The curve representing its change law is called the engine characteristic curve. General-purpose engines have speed characteristics, load characteristics, regulation characteristics and general-purpose characteristics.

4. [Answer]: The characteristic curve family that shows the change of various performance parameters of the internal combustion engine in various working conditions on a diagram is called universal characteristics. For example, the be curve family, the exhaust temperature emission and other curve families drawn in the coordinate plane with n as the horizontal coordinate and Pme (or Ttq) as the vertical coordinate.

5. What is the difference between the change of the partial opening speed characteristic curve and the external characteristics? The reason is that the source voltammetry characteristic curve reflects the characteristics of the power supply, and the information E and r of the power supply can be obtained.

6. Generally speaking, the universal characteristic refers to the universal characteristic curve. The engine speed is taken as the horizontal coordinate, the torque or average effective pressure is taken as the vertical coordinate, and then the engine load characteristics and fuel consumption characteristics are made on a diagram.

How to obtain the load characteristics, speed characteristics and all-in-one characteristics curve of the engine

1. The curve is also known as the map. The left vertical coordinate is the output torque of the engine, the horizontal coordinate is the engine speed, and the right vertical coordinate is the average effective pressure of the engine cylinder.

2. First, establish a model of the engine, and the fitting method is the MATLAB command. Secondly, establish a model of the relationship between fuel consumption rate, rotation speed and torque, draw a three-dimensional surface diagram, and then generate a two-dimensional equivalent line diagram. Finally, the load characteristic curve can be drawn.

3. In all characteristicsOn the curve, the higher the point, the higher the load rate, and the load is 100% at the highest point (external characteristics). The isofuel consumption line of the engine's all-characteristic curve mainly reflects: the fuel consumption rate under different engine speeds and load conditions, that is, the curves marked with numbers in the figure below, which are called equal fuel consumption lines.

4. If the speed characteristics of the engine are used to explain the concept of load rate and load, the definition of engine load rate will be clearer. Curve I is the external characteristic, and curve II and III are partial velocity characteristics. When n=3500r/min, if the throttle valve is fully opened, the maximum output that may be generated by this speed is 45KW.

5. Expressed in the form of a curve, it is the load characteristic curve. The load characteristic curve of the engine is measured on the engine test bench.Before measuring, keep the engine coolant temperature and lubricating oil temperature at the best value; adjust the load of the dynamometer and change the circulating oil supply to stabilize the engine speed at a certain constant.

6. When the speed of the engine remains unchanged, its performance index is related to the change of load, and the speed must remain unchanged when determining the load characteristics. One of the performance characteristics of the engine is called load characteristics, which refers to the relationship between the effective specific fuel consumption of economic indicators and the change of engine load when the engine speed is constant.

Gasoline engine universal characteristic curve understanding

1. All-specific characteristic curve, also known as map, the left vertical coordinate is the engine output torque, the horizontal coordinate is the engine speed, and the right vertical coordinate is the engine power The average effective pressure of the cylinder.

2. Engine characteristics refer to the law that the performance indicators of the engine change with the adjustment and operating conditions of the engine. The curve representing its change law is called the engine characteristic curve. General-purpose engines have speed characteristics, load characteristics, regulation characteristics and general-purpose characteristics.

3. The characteristics of these engines we often mention mainly refer to its performance indicators. A regular curve formed with the continuous change of the operation of the engine is called the characteristic curve of the engine.

4. The characteristic curve outside the engine is measured when the engine can emit maximum power in the best working state of the engine. Its curve characteristics are: both the power curve and the torque curve show convex curves, but the performance of the two is different.

5. The influence of the shape and position of the characteristic curve of the internal combustion engine on the performance of the internal combustion engine: fuel consumption: the change of the shape and position of the curve can affect the fuel consumption rate of the internal combustion engine, thus affecting its fuel economy performance.

What does the engine characteristic curve mean to the car? How to have an in-depth understanding?

1. Engine characteristics refer to the law that the performance index of the engine changes with the adjustment and operating conditions of the engine. The curve representing its change law is called the engine characteristic curve. General-purpose engines have speed characteristics, load characteristics, regulation characteristics and general-purpose characteristics.

2. First of all, the effective power of the engine is the most important indicator of performance.Many people will mention its engine performance when buying a car, mainly because of the power of the engine.

3. The extra-engine characteristic curve refers to the curve of the power or torque measured with the speed of the engine at full load. The following is a specific introduction: Engine characteristic curve: If the functional relationship between the engine power torque and fuel consumption rate and the engine crankshaft speed is expressed as a curve, this curve is called the engine characteristic curve.

4. The characteristics of the engine are a comprehensive reflection of the engine performance. Under certain conditions, the law of change of engine performance indicators or characteristic parameters with various variable factors is the characteristics of the engine.

5. In addition, the maximum power is reached at more than 3200 runs (intersecting point), (fuel-saving).The analysis determines that he is an engine with a supercharger. Therefore, he is a pretty good 0T engine. You can take out the curve of other car engines 0 to compare, and you will understand. Many cars can't reach this data.