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  • EMS 2.2

EMS 2.2

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What is EMS?

EMS stands for Engine Management System, which refers to the engine control system.

Main Functions

  • Fuel Injection Control
  • Optimizes fuel injection amount and timing to improve fuel efficiency and reduce emissions.
  • Works in conjunction with the common rail system.
  • Air Management
  • Controls turbocharger, EGR (Exhaust Gas Recirculation), and intercooler to maintain the correct air supply.
  • Emission Control
  • Integrates with SCR (Selective Catalytic Reduction) and DPF (Diesel Particulate Filter) to meet Euro 6 and other emission standards.
  • Engine Protection
  • Limits engine performance or issues warnings in case of overheating, overload, or malfunction.
  • OBD (On-Board Diagnostics)
  • Generates Diagnostic Trouble Codes (DTC) and provides maintenance information.
  • Works with diagnostic tools (e.g., Volvo Tech Tool) for servicing.

Overview of EMS 2.2

Name: EMS 2.2 (Engine Management System 2.2)

Main application period: around 2009–2012

Communication method: J1939 CAN communication

Main ECU location: Side of the engine or inside the engine compartment

Sensor and Actuator Configuration

EMS 2.2 operates with various sensors and actuators.

Main Sensors

  • CAM Sensor (Camshaft position)
  • Crank Sensor (Crankshaft position)
  • Coolant Temperature Sensor
  • Boost Pressure Sensor
  • Fuel Pressure Sensor
  • Throttle Position Sensor
  • Intake Air Temperature Sensor
  • NOx Sensor, EGR Sensor (some models)

Main Actuators

  • Injectors (Unit Injectors, PDE)
  • EGR Valve
  • Turbocharger Control Valve
  • Fuel Pressure Regulator
  • Idle Speed Actuator

Communication Structure

EMS 2.2 operates with various sensors and actuators.

 

  • VECU (Vehicle ECU) – Driving-related functions
  • TECU (Transmission ECU) – Automated transmission
  • EBS/ABS – Brake system
  • ICU – Instrument cluster

 

All ECUs are connected via the CAN Bus, with EMS serving as the core engine-related node.