Because in the real world, it is not easy to judge the performance of a road sweeper. It is almost impossible to achieve absolute objectiveness and fairness. Why? The reason is very simple. In addition to the chassis engine, the sanitation sweeper truck also has a dedicated secondary engine, which is exactly the same because there are absolutely no two driving conditions! So, whether the chassis manufacturers or the road-sweeping car manufacturers are good, the fuel consumption data they publish is actually an “ideal value.†In the real work process, it is not easy to achieve such fuel consumption performance.
Because in the real world, it is not easy to judge the performance of a road sweeper. It is almost impossible to achieve absolute objectiveness and fairness. Why? The reason is very simple. In addition to the chassis engine, the sanitation sweeper truck also has a dedicated secondary engine, which is exactly the same because there are absolutely no two driving conditions! So, whether the chassis manufacturers or the road-sweeping car manufacturers are good, the fuel consumption data they publish is actually an “ideal value.†In the real work process, it is not easy to achieve such fuel consumption performance.
In general, although the standards vary from country to country, the methods for testing fuel consumption are all similar - at least the principle is the same. Basically, all countries will test three kinds of fuel consumption values, one is in the urban area, one is at 90 km/h, and the other is a highway. In some countries, it is a mixed model of “urban+highwayâ€. To replace the non-realistic 90km/h fixed speed fuel consumption value. The test unit will first use a car to run the three driving conditions it wants to test. These driving modes will be connected to the computer through the fifth round and recorded on the tape or floppy disk. After being sent to the testing unit, the test car submitted for inspection will be “tied†on the Chassis Dynomometer. The chassis power meter has rollers on which the wheel of the test vehicle sits.
The chassis power meter is controlled by a computer. When the driving conditions recorded on the magnetic tape or magnetic disk are input into the computer, the chassis power meter is moved. The test vehicle is passively carried by the chassis power meter and ran in place. It runs. The status will be exactly the same as the driving condition recorded by the test unit at the beginning. It will be refueled, sometimes stopped, and sometimes decelerated. The driving status is completely controlled by the Driving Mode on the magnetic sheet. The purpose of this is to make the test conditions of all test vehicles consistent. Maintain the fairness of fuel consumption test data.
The official data or factory data of the road-sweeping vehicle fuel consumption is calculated in this way, and the driving mode (engine status) that affects fuel consumption performance will also be met by each country according to the progress of engine technology, environmental protection requirements, etc., every few years. Will adjust. The direction of adjustment is definitely becoming increasingly stringent, and this has also become the driving force behind the development of environmental protection sweeper vehicle manufacturers.
In general, although the standards vary from country to country, the methods for testing fuel consumption are all similar - at least the principle is the same. Basically, all countries will test three kinds of fuel consumption values, one is in the urban area, one is at 90 km/h, and the other is a highway. In some countries, it is a mixed model of “urban+highwayâ€. To replace the non-realistic 90km/h fixed speed fuel consumption value. The test unit will first use a car to run the three driving conditions it wants to test. These driving modes will be connected to the computer through the fifth round and recorded on the tape or floppy disk. After being sent to the testing unit, the test car submitted for inspection will be “tied†on the Chassis Dynomometer. The chassis power meter has rollers on which the wheel of the test vehicle sits.
The chassis power meter is controlled by a computer. When the driving conditions recorded on the magnetic tape or magnetic disk are input into the computer, the chassis power meter is moved. The test vehicle is passively carried by the chassis power meter and ran in place. It runs. The status will be exactly the same as the driving condition recorded by the test unit at the beginning. It will be refueled, sometimes stopped, and sometimes decelerated. The driving status is completely controlled by the Driving Mode on the magnetic sheet. The purpose of this is to make the test conditions of all test vehicles consistent. Maintain the fairness of fuel consumption test data.
The official data or factory data of the road-sweeping vehicle fuel consumption is calculated in this way, and the driving mode (engine status) that affects fuel consumption performance will also be met by each country according to the progress of engine technology, environmental protection requirements, etc., every few years. Will adjust. The direction of adjustment is definitely becoming increasingly stringent, and this has also become the driving force behind the development of environmental protection sweeper vehicle manufacturers.
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