942580 Volvo.Penta Gasket

Electronic Control Circuit Diagram
Illustration 1 g01442386
Electronic control circuit diagram
Block Diagrams
Illustration 2 is a block diagram of the control system for C13 engines. Illustration 3 is a block diagram of the control system for C15 engines.
Illustration 2 g01384887
Block diagram for C13 engines
(1) Air cleaner
(2) Inlet air temperature sensor
(3) Control group for the Clean Gas Induction System (CGI)
(4) CGI Cooler
(5) Differential pressure sensor for the CGI system
(6) Absolute pressure sensor for the CGI system
(7) Temperature sensor for the CGI system
(8) Turbocharger outlet temperature sensor
(9) Flame detection temperature sensor
(10) Flame boundary temperature sensor
(11) Ignition coil
(12) Spark plug
(13) ARD head
(14) ARD body
(15) DPF
(16) Inlet temperature sensor for the DPF
(17) Differential pressure sensor for the DPF
(18) Outlet temperature sensor for the DPF
(19) Low pressure turbocharger
(20) High pressure turbocharger
(21) Optional precooler
(22) Control group for the combustion air system
(23) Differential pressure sensor for the combustion air supply
(24) Filter for the purge air
(25) ARD purge air pump
(26) Pilot fuel pressure sensor
(27) Main fuel pressure sensor
(28) Pilot fuel control solenoid
(29) Main fuel control solenoid
(30) Fuel enable valve
(31) Fuel pressure sensor (if equipped)
(32) 517 kPa (75 psi) pressure regulator
(33) Fuel transfer pump
(34) Primary fuel filter
(35) Fuel temperature sensor
(36) Secondary fuel filter
(37) Fuel tank
(38) Intake valve actuation control valve
(39) Intake valve actuation pressure sensor
(40) Air-to-air aftercooler
(41) Coolant temperature sensor
(42) Secondary speed-timing sensor (camshaft)
(43) Primary speed-timing sensor (crankshaft)
(44) Fuel injectors
(45) Intake valve actuators
(46) Compression brakes
(47) Crankcase pressure sensor
(48) Intake manifold air temperature sensor
(49) Intake manifold pressure sensor
(50) Oil pressure sensor
(51) ECM
(52) Engine
Illustration 3 g01384888
Block diagram for C15 engines
High horsepower engines have two diesel particulate filters (15).
(1) Air cleaner
(2) Inlet air temperature sensor
(3) Control group for the Clean Gas Induction System (CGI)
(4) CGI Cooler
(5) Differential pressure sensor for the CGI system
(6) Absolute pressure sensor for the CGI system
(7) Temperature sensor for the CGI system
(8) Turbocharger outlet temperature sensor
(9) Flame detection temperature sensor
(10) Flame boundary temperature sensor
(11) Ignition coil
(12) Spark plug
(13) ARD head
(14) ARD body
(15) DPF
(16) Inlet temperature sensor for the DPF
(17) Differential pressure sensor for the DPF
(18) Outlet temperature sensor for the DPF
(19) Low pressure turbocharger
(20) High pressure turbocharger
(21) Optional precooler
(22) Control group for the combustion air system
(23) Differential pressure sensor for the combustion air supply
(24) Filter for the purge air
(25) ARD purge air pump
(26) Pilot fuel pressure sensor
(27) Main fuel pressure sensor
(28) Pilot fuel control solenoid
(29) Main fuel control solenoid
(30) Fuel enable valve
(31) Fuel pressure sensor (if equipped)
(32) 517 kPa (75 psi) pressure regulator
(33) Fuel transfer pump
(34) Primary fuel filter
(35) Fuel temperature sensor
(36) Secondary fuel filter
(37) Fuel tank
(38) Intake valve actuation control valve
(39) Intake valve actuation pressure sensor
(40) Air-to-air aftercooler
(41) Coolant temperature sensor
(42) Secondary speed-timing sensor (camshaft)
(43) Primary speed-timing sensor (crankshaft)
(44) Fuel injectors
(45) Intake valve actuators
(46) Compression brakes
(47) Crankcase pressure sensor
(48) Intake manifold air temperature sensor
(49) Intake manifold pressure sensor
(50) Oil pressure sensor
(51) ECM
(52) Engine System Operation
Engine Governor
The ECM governs the engine. The ECM determines the timing, the injection pressure, and the amount of fuel that is delivered to each cylinder. These factors are based on the actual conditions and on the desired conditions at any given time during starting and operation.The governor uses the accelerator pedal position sensor to determine the desired engine speed. The governor compares the desired engine speed to the actual engine speed. The actual engine speed is determined through interpretation of the signals that are received by the ECM from the engine speed/timing sensors. If the desired engine speed is greater than the actual engine speed, the governor injects more fuel in order to increase engine speed.
Illustration 4 g01120999
Typical example
The desired engine speed is typically determined by one of the following conditions:
The position of the accelerator pedal
The desired vehicle speed in cruise control
The desired engine speed in Power Take-Off (PTO)Timing Considerations
Once the governor has determined the amount of fuel that is required, the governor must determine the timing of the fuel injection. Fuel injection timing is determined by the ECM after considering input from the following components:
Coolant temperature sensor
Intake manifold temperature sensor
Intake manifold pressure sensor
Atmospheric pressureThe ECM adjusts timing for optimum engine performance and for fuel economy. Actual timing and desired timing cannot be viewed with Caterpillar Electronic Technician (ET). The ECM determines the location of top center of the number one cylinder from the signals that are provided by the engine speed/timing sensors. The ECM determines when injection should occur relative to top center. The ECM then provides the signal to the injector at the desired time.Fuel Injection
The ECM sends a high voltage signal to the injector solenoids in order to energize the solenoids. By controlling the timing and the duration of the high voltage signal, the ECM can control the following aspects of injection:
Injection timing
Fuel deliveryThe flash file inside the ECM establishes certain limits on the amount of fuel that can be injected. The "FRC Fuel Limit" is a limit that is based on the intake manifold pressure. The "FRC Fuel Limit" is used to control the air/fuel ratio for control of emissions. When the ECM senses a higher intake manifold pressure, the ECM increases the "FRC Fuel Limit". A higher intake manifold pressure indicates that there is more air in the cylinder. When the ECM increases the "FRC Fuel Limit", the ECM changes the control signal to the inject