MC aircon

www.oto-hui.com Air conditioning System Published by Hyundai Motor company , september 2005 SYSTEM COMPARISON The HVAC (Heating Ventilation Air Conditioning) system combines heating, cooling, ventilation, dehumidifying The airflow is controlled by manual type and automatic type Full Automatic Temperature Control (FATC) features completely automatic control of discharge air temperature A FATC control module controls air conditioning, ventilating, heating, and defrosting systems Air filter www.oto-hui.com Evaporator Blower motor Heater core PTC heater INSTALL LAYOUT Blower Assembly Compressor Assembly www.oto-hui.com HAVC Assembly Expansion Valve APT Sensor Condenser and Cooling Fan Assembly Air conditioning System COMPONENTS Published by Hyundai Motor company , september 2005 CONDENSER Blower Assembly www.oto-hui.com Parallel Flow Type and Sub-Cool Type Function : The condenser changes the refrigerant from the vapor of high temperature, high pressure to the liquid Condenser and Cooling Fan Assembly of high temperature, high pressure COMPRESSOR (Variable Swash Plate) Refrigerant intake and compression methods are almost the same as those for the Fixed Swash Plate Compressor The swash plate angle can be adjusted, which forces the piston to make larger or smaller strokes This enables stable temperature control and improved driving feeling Piston Swash plate Blower Assembly Outlet chamber (Pd) Inlet chamber (Ps) Shaft Control chamber (Pc) Control Valve www.oto-hui.com COMPRESSOR (Variable Swash Plate) Operation www.oto-hui.com Outlet chamber Control chamber pressure increase Control valve open Diaphragm (Ps) • Inlet pressure is lower than standard value 2.0kgf/cm2 • Diaphragm shrinking → Control valve open • Outlet gas enter to Control chamber (Control chamber pressure is increased ) • Swash plate angle is decreased COMPRESSOR (Variable Swash Plate) Operation www.oto-hui.com Outlet chamber Control chamber pressure increase Control valve open • Inlet pressure is higher than standard value 2.0kgf/cm2 • Diaphragm expansion → Control valve close • Outlet gas can not enter to Control chamber ( Control chamber pressure is decreased ) • Swash plate tilting angle is increased COMPRESSOR (Variable Swash Plate) Operation Diagram www.oto-hui.com •• Standardize Standardize the the inlet inlet pressure pressure •• Standardize Standardize the the Venting Venting temperature temperature •• Clutch Cycling Prevention Clutch Cycling Prevention •• Improvement Improvement in in Fuel Fuel Consumption Consumption •• Engine Surge Prevention Engine Surge Prevention Control Controlchamber chamber pressure increasing pressure increasing * Swash plate tilting angle decreasing * Outlet flux decreasing Control chamber Outlet chamber Inlet pressure < Control valve standard value Control valve open Inlet pressure decreasing * Swash plate tilting angle increasing * Outlet flux increasing Outlet chamber Control Controlchamber chamber pressure decreasing pressure decreasing Control chamber Inlet pressure > Control valve standard value Control valve close Inlet pressure increasing Pressure detecting Pressure detecting Evaporator load decreasing Evaporator load increasing EVAPORATOR AIR FILTER 10 www.oto-hui.com DESCRIPTION Employing combination filter, dust and odor in the air is effectively removed LIFE TIME Filter replacement period is 5,000~12,000 km But this can be shorten if the road condition is bad causing more dust and black smoke in the air BLOWER MOTOR SPEED CONTROL 11 www.oto-hui.com POWER MOSFET (Metal-Oxide Semiconductor Field Effect Transistor) Blower speed is controlled by the MOSFET (Metal-Oxide Semiconductor Field Effect Transistor) Changing the fan switch from positions through 8, allowing the fan to run faster Drain Source Gate Air conditioning System SENSORS Published by Hyundai Motor company , september 2005 FIN THERMO SENSOR www.oto-hui.com DESCRIPTION Fin sensor is installed in the evaporator in order to detect the temperature of evaporator It prevents evaporator from freezing OPERATING CHARACTERISTICS Compressor: OFF 3.0℃ Compressor: ON 5.0℃ 13 IN-CAR & HUMIDITY SENSOR 14 The in-car sensor measures the temperature and humidity of passenger compartment www.oto-hui.com In-car sensor Humidity sensor PHOTO SENSOR In response to photo intensity level in vehicle, the sensor will send signal to control module to control the blower level and discharge temperature www.oto-hui.com 15 AMBIENT SENSOR 16 The ambient temperature sensor detects the temperature of outside air The sensor output will be used for discharge air temperature, sensor fail-safe, temperature door control, blower motor level control, mix mode control and in-car humidity control www.oto-hui.com AIR QUALITY SYSTEM The Air Quality System detects exhaust gas of neighboring vehicles and intercepts automatically AQS controls the inlet of car automatically and can be easily installed to the existing vehicle Manual operation is also available www.oto-hui.com 17 AUTOMOTIVE PRESSURE TRANSDUCER 18 The APT (Automotive Pressure Transducer) senses the pressure of the refrigerant that provides a linear voltage output directly proportional to applied pressure Output (Vdc) Approximately 4.8V App 0.2V 1.0 Normal Operating range 32.6 Pressure (kg/ ㎠ ) A There is 0.2V(not 0V), if the refrigerant line pressure has gone to 0, for communication to engine ECM (0V means poor contact or open circuit) B There is 4.8V, even if the line pressure is over the standard value (high pressure) (5V means short circuit) TEMPERATURE UNIT CHANGE 19 www.oto-hui.com Application : MC` Objectives - To temperature unit change operation Required materials - Vehicle Procedure - Ignition key : On - Press the auto button with off button for seconds - Check the temperature unit change Time to complete : minutes Reference : - User may choose the temperature indication between °C and °F Press the auto button for seconds during pressing off button Temp unit change: Press for seconds or more ℃ ℉ Keep pressing DIAGNOSIS Application : MC` Objectives - To understand, how to perform the diagnosis Required materials - Vehicle Procedure - Ignition key : Off -> On - Press the OFF switch more than times within seconds during pressing the AUTO switch - Check the DTC code Time to complete : minutes Reference : - 20 The FATC module self diagnosis test feature will detect electrical malfunction and provide error codes for system components with suspected failures IGN KEY : OFF -> ON www.oto-hui.com [...]... poor contact or open circuit) B There is 4.8V, even if the line pressure is over the standard value (high pressure) (5V means short circuit) TEMPERATURE UNIT CHANGE 19 www.oto-hui.com 1 Application : MC` 2 Objectives - To do temperature unit change operation 3 Required materials - Vehicle 4 Procedure - Ignition key : On - Press the auto button with off button for 3 seconds - Check the temperature unit... choose the temperature indication between °C and °F Press the auto button for 3 seconds during pressing off button Temp unit change: Press for 3 seconds or more ℃ ℉ Keep pressing DIAGNOSIS 1 Application : MC` 2 Objectives - To understand, how to perform the diagnosis 3 Required materials - Vehicle 4 Procedure - Ignition key : Off -> On - Press the OFF switch more than 4 times within 2 seconds during pressing