ニュース
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エキスパートガイドエキスパンション・バルブの仕組みと故障の5つの兆候
読む もっと読むAbstract The expansion valve is a pivotal metering device within vapor-compression refrigeration and air conditioning systems, including those found in modern trucks. Its primary function is to modulate the flow of high-pressure liquid refrigerant into the low-pressure environment of the evaporator. This process involves a significant pressure drop, which causes the refrigerant to rapidly cool and partially vaporize, a phenomenon known as flash-gas. The valve's operation is fundamental to the entire cooling cycle, as it directly controls the rate at which the refrigerant absorbs heat. Thermostatic expansion valves, the most common type, use a sensing bulb to monitor the refrigerant temperature at the evaporator outlet. This feedback mechanism allows the […]
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Expert Guide to 200+ Components: How Many Parts Are There in a Car Engine?
読む もっと読むAbstract An inquiry into the precise number of components within a standard internal combustion car engine reveals a complex and variable answer. Rather than a single definitive figure, the total count is contingent upon the engine's specific design, architecture, and intended application. A typical four-cylinder engine may contain over two hundred distinct parts, a figure that escalates significantly with more complex configurations like V8 or V12 engines, or in specialized diesel applications for commercial vehicles. This analysis deconstructs the engine into its fundamental systems: the static block, the dynamic rotating assembly, the intricate cylinder head and valvetrain, and the essential life-support systems for cooling, lubrication, fuel delivery, and air management. […]
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神話と事実：トランスミッションはエンジンの一部か？トラック所有者のための3つの専門家による洞察
読む もっと読むAbstract An examination of the relationship between a vehicle's engine and transmission reveals they are distinct, albeit interconnected, systems. The engine functions as the power-generating unit, converting the chemical energy of fuel into mechanical rotational force through internal combustion. The transmission, conversely, serves as a power management system, modulating this force through a series of gear ratios to deliver appropriate torque and speed to the wheels. While they are bolted together and work in concert, their internal components, operational principles, and maintenance requirements are fundamentally separate. The engine relies on components like the air flow meter and exhaust system to manage combustion, while the transmission utilizes parts such as the […]
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An Expert’s Guide to Maintaining Truck Exhaust Systems: Avoid These 7 Costly 2025 Mistakes
読む もっと読むAbstract The operational integrity of a heavy-duty truck is inextricably linked to the health of its aftertreatment system. In 2025, with emissions regulations becoming increasingly stringent globally, the procedures for maintaining truck exhaust systems have evolved into a complex yet non-negotiable aspect of fleet management. This document examines the multifaceted nature of modern diesel exhaust systems, focusing on the Diesel Particulate Filter (DPF), Selective Catalytic Reduction (SCR), and related components. It analyzes common yet costly errors in maintenance, from misinterpreting diagnostic warnings and neglecting regeneration cycles to the use of substandard parts and illegal system modifications. The analysis extends to the systemic impact of related vehicle components, such as the […]