Trang 2 HC, O2, N2HCN2O2O2N2HCH2O, CO2, N2Basics about combustion4EMS gasoline 1λ = 1 real air rate equal stoichiometric air rate λ < 1 rich mixture real air rate < stoichiometric air ra
EMS Gasoline ECU Copyright by KIA Motors All rights reserved EMS gasoline Development steps of engine control systems Low price High power Low fuel consumption Drivability High reliability Low pollution High durability Compact and light Low noise and vibration EMS gasoline Basics about combustion HC, O2, N2 H2O, CO2, N2 N2 O2 HC O2 HC N2 EMS gasoline Influence of mixture composition Air 14.7kg NOx N2+O2 Gas mixture Stoichiometric-ideal Fuel 1kg 10,000 liter Air 1.0 liter Fuel λ = real air rate equal stoichiometric air rate λ < rich mixture (real air rate < stoichiometric air rate) λ > lean mixture (real air rate > stoichiometric air rate) Catalytic converter EMS gasoline Mixture control ECM ECM Stoichiometric-ideal ECM ECM EMS gasoline Control unit INPUT Sensors to detect the engine operating conditions, such as engine speed, coolant temperature etc CONTROL UNIT ECM signal processing actuator control OUTPUT Actuators to influence the engine operating conditions, such as engine speed, coolant temperature etc EMS gasoline Subsections of the engine control system Fuel delivery system Air Induction System Ignition system Electronic Control System Exhaust system ECU EMS gasoline Fuel delivery overview Rollover valve Fuel pump Fuel pump connector Fuel gauge Fuel tank Control unit Fuel filter Charcoal canister Injectors Fuel rail Fuel pressure regulator EMS gasoline Fuel Pump Fuel filter (regular maintenance required) EMS gasoline 10 Fuel pump control Bosch / Siemens Melco Ignition Switch IG/SW (ON) IG/SW (ST) Fuel Pump Control Relay Fuel pump check connector MFI Control Relay Auto fuel cut device (in case of a crash) EMS gasoline 11 Delivery pipe and pressure regulator To fuel tank Adjustment screw Conter spring Seal Fuel filter Fuel pump Fuel pipe Return line Inlet Valve body Diaphragm Control spring Fuel pressure regulator Vacuum At vacuum Injectors 2.5 or 2.9 bar Fuel delivery system to be checked for leakage visibily during maintenance Vacuum hose to pressure regulator to be checked during inspection / in case of problems Fuel pressure 2.5 or 2.9 bar Atmospheric Pressure Intake Manifold Pressure EMS gasoline 12 Returnless fuel delivery Plastic Fuel Rail Supports Stainless Steel Fuel Pipe EMS gasoline 13 Fuel Injectors +B +B Solenoid Resistor High Resistance Injector Low Resistance Injector Pencil Beam Conical (Pintle) Conical (4H) 2Stream MultiHole Caution: Never apply battery voltage directly across a low resistance injector This will cause injector damage from solenoid coil overheating EMS gasoline 14 Air induction overview Air Intake Chamber MAF Intake Valve Throttle Body Air Filter TPS Idle Speed Controler EMS gasoline 15 Intake air chamber and manifold Vacuum Signal Ports Air Intake Chamber Throttle Position Sensor Intake Manifold (adjustment may be required in the case of idle speed problems) Separated Type Air Intake Chamber Coolant Intake Manifold Integrated Type Throttle housing may need to be cleaned in case of idle speed problems EMS gasoline 16 ISC system Basic adjustment may be required in the case of idle speed problems EMS gasoline 17 ETC – Throttle body Return spring Throttle valve Throttle body Gear Shaft TPS1,2 Drive motor EMS gasoline 18 ETC block diagram Throttle body assembly Throttle valve Engine TPS1 TPS2 ECM APS 1, Throttle motor CAN Com Drive gear ABS ECM (TCS Control) EMS gasoline 19 Variable intake system ECM EMS gasoline 20 Variable intake system Interference Valve Manifold Valve Upper tract for cylinders #1, #3 and #5 Lower tract for cylinders #2, #4 and #6 Vacuum hoses to be checked visbily during maintenance 10