What are the reasons for the lack of power and explosive force in Weichai engines?
2 Answers
Weichai engines may experience a lack of power and explosive force due to the following reasons: 1. Insufficient fuel supply: The fuel system should be able to inject well-atomized fuel into the cylinder at the right time and in the right amount. If there is a malfunction in the fuel system, the amount of fuel injected into the cylinder is reduced, leading to less heat generated during combustion. When the heat generated is insufficient to meet the engine load requirements, the engine will lack power. 2. Poor spray quality: If the fuel injector's spray quality is poor during engine operation, the surface area of the fuel injected into the cylinder is reduced, decreasing the oxygen combination rate. Even if the amount of fuel injected into the cylinder is sufficient, poor atomization results in less oxidation reaction and less heat generated. 3. Influence of injection timing: The amount of fuel injected into the cylinder should be appropriate. If the pressure rise rate during the rapid combustion phase increases, it can easily cause engine knocking. Knocking consumes part of the power, and the thermal efficiency utilization is also not high, resulting in a reduction in the effective power output. If the injection timing is too late, most of the combustion process shifts to the expansion stroke, reducing the pressure rise rate, lowering the peak pressure, increasing exhaust temperature, and causing more heat loss to the cooling water, significantly decreasing thermal efficiency.
I've encountered many cases of insufficient power in Weichai engines, usually with these possibilities: Fuel system issues are the most common, clogged injectors or insufficient high-pressure pump pressure can lead to poor diesel atomization and incomplete combustion, naturally resulting in lack of power. Exhaust blockage is also quite troublesome, such as a clogged particulate filter or a faulty catalytic converter, preventing exhaust gases from escaping is like a person unable to breathe. Turbocharger leaks or damaged blades are also very common, and if the intercooler pipes are cracked, it further affects intake efficiency. Electronic control system failures should not be overlooked either, inaccurate rail pressure sensor signals or drifting MAF data can cause the ECU to receive incorrect signals and limit power output. Don't forget basic issues like a dirty air filter or overdue diesel filter replacement; I've seen many people neglect these small details leading to big problems.
