What is the engine load?

Engine load: when the engine speed is constant, its performance index changes with the load, so the speed must be kept constant when measuring the load characteristics. That is, when the engine speed is constant and the throttle opening changes gradually, the relationship between the fuel consumption b and the fuel consumption rate b per hour and the load (Pe, Ttq or Pme) changes. )

The load characteristic of gasoline engine is also called throttle characteristic, and the load characteristic of diesel engine is also called fuel regulation characteristic.

One of the performance characteristics of the engine is called the load characteristic, which refers to the relationship between the effective ratio of economic indicators and fuel consumption and the engine load under the condition of constant engine speed. Using this change curve, the economy of the engine under various loads and speeds can be determined most comprehensively.

Extended data:

Because the engine speed is constantly changing, it is necessary to measure the load characteristics of the engine at different speeds in order to comprehensively evaluate the fuel economy of the engine at different speeds and different loads. The reading of engine load characteristics is carried out on the test bench.

Taking a gasoline engine as an example, after starting the engine, gradually open the throttle to the maximum, adjust the load, make the engine run stably at a certain speed, and measure the output power and fuel consumption of the engine under this working condition. Then turn down the throttle, adjust the load and keep the engine speed unchanged before measuring.

This is done in turn until the engine can maintain the minimum throttle opening for stable operation and get the fuel consumption at different loads and speeds. The change trend of engine load characteristic curve at different speeds is similar, but the specific values are different.

References:

Baidu encyclopedia-engine load characteristics