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1. What are the symptoms of a broken diesel engine flow meter unit?
After a damaged diesel engine flow meter unit, abnormal power, changes in fuel consumption, fault prompts, and unstable operation may occur.
1. There is a problem with the power output. One reason is the lack of acceleration, as the flow meter cannot accurately measure the intake air volume, resulting in a mismatch between fuel injection and intake air volume, an imbalance in air-fuel ratio, slow power response when stepping on the accelerator, and more pronounced during heavy loads or climbing. Secondly, the idle speed is unstable, with incorrect intake data, fuel injection deviating from the normal range, engine shaking, speed fluctuations, and even stalling at idle. Thirdly, some car models may trigger engine protection mechanisms due to flow meter malfunctions, resulting in sudden power drops or brief interruptions. Secondly, there have been changes in fuel consumption and emissions. On the one hand, fuel consumption has increased, and the malfunction of the flow meter has led to inaccurate control of fuel injection. Wang Xiangyous fuel combustion is insufficient, resulting in a significant increase in fuel consumption per unit mileage and sales volume. In some cases, fuel consumption can increase by 10% -30%. On the other hand, excessive emissions and imbalanced air-fuel ratio result in incomplete combustion of fuel turning into black smoke, with noticeable black smoke in the exhaust. At the same time, emissions of hydrocarbons and carbon monoxide increase.
Thirdly, there are fault prompts and system responses. One is that the fault light is on, and the abnormal flow meter signal is detected by the engine ECU. The engine fau
Fourth, there are issues with the stability of engine operation. Some car models have difficulty starting due to flow meter malfunctions, abnormal fuel injection control during startup, prolonged startup time, or the need for multiple startups to succeed. Secondly, an imbalance in air-fuel ratio may cause irregular combustion inside the engine, resulting in irregular vibrations or metal knocking sounds. Be aware that the symptoms of flow meter malfunction may overlap with other sensor malfunctions. It is recommended to use a professional diagnostic tool to read the fault code and accurately locate the problem.
2. Characteristics of diesel flowmeter
◆ High accuracy, ± 1%, ± 0.5%, ± 0.2%.
. Good repeatability, short-term repeatability can reach 0.05% to 0.2%, making it a preferred flowmeter for trade settlement. Output pulse frequency signal, suitable for total measurement and computer connection, no zero drift, strong resistance to cave group interference. ◆ It can obtain a good frequency signal (3-4kHz) with strong signal resolution. ◆ Compact and lightweight structure, easy installation and maintenance, and high circulation capacity. Suitable for high voltage measurement, the instrument body does not require openings and is easy to make into a high voltage type instrument. Technical parameters of diesel flowmeter: Instrument diameter: Threaded connection:4,
6,
10, 15, 20, 2
5, 32, 40 Flange connection: (1
5, 20, 2
5, 3
2, 40) 50, 6
5, 80, 100, 12
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