Reasons for high low pressure in an automotive compressor: Compressor damage; Excessive opening of the expansion valve (refers to excessive opening caused by valve body failure, such as loose adjustment spring, faulty temperature sensing bulb, etc.); Poor system design, such as an undersized compressor, oversized expansion valve selection, excessive flow resistance in the evaporator, excessive flow resistance in the low-pressure pipe, etc.; Poor heat dissipation in the condenser, lack of subcooling before refrigerant enters the evaporator leading to poor heat exchange efficiency in the evaporator. Relevant information about turbochargers is as follows: 1. Introduction: A turbocharger is essentially an air compressor that increases air intake by compressing air. 2. Working Principle: It utilizes the inertial force of exhaust gases from the engine to drive the turbine in the turbine chamber, which in turn drives the coaxial impeller. The impeller compresses air delivered through the air filter pipe, pressurizing it into the cylinders. When the engine speed increases, the exhaust gas velocity and turbine speed also increase synchronously, allowing the impeller to compress more air into the cylinders. The increased air pressure and density enable the combustion of more fuel, thereby increasing fuel supply and adjusting the engine speed, which enhances the engine's output power.
