What does engine dm1 mean?

[Peter]

Engine dm1 refers to a condition where the engine operates normally under no load, but exhibits sluggish acceleration, lack of power when climbing hills, and insufficient power even when the accelerator pedal is fully depressed. The engine speed does not increase adequately and fails to reach the maximum vehicle speed. Basic structure of internal combustion engines: The engine block serves as the framework of the engine, providing the mounting foundation for all engine mechanisms and systems. It houses all major components and accessories, both internally and externally, and withstands various loads. Therefore, the engine block must possess sufficient strength and rigidity. The block assembly primarily consists of the cylinder block, cylinder liner, cylinder head, and cylinder gasket. Introduction to engine cooling systems: The primary function of the cooling system is to dissipate heat absorbed by heated components in a timely manner, ensuring the engine operates within the optimal temperature range. Cooling systems can be classified into air-cooled and liquid-cooled types based on the cooling medium used. A system that directly dissipates heat from high-temperature engine components into the atmosphere is called an air-cooled system.