KUBOTA ENGINE AMERICA Service Training Kubota Engine Training: WG1605, spark ignited.
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Transcript of KUBOTA ENGINE AMERICA Service Training Kubota Engine Training: WG1605, spark ignited.
KUBOTA ENGINE AMERICA Service
Training
WG1605 Engine Training: System OverviewsMechanical Components Electronic Components and
SensorsOperationService Tool
KUBOTA ENGINE AMERICA Service
Training
Mechanical Components: WG1605 engines are similar to
V1505. Some differences include:
Intake and exhaust manifolds. Positive Crankcase Ventilation
system. Pistons. Cylinder heads and valves. Crankcase, Camshaft.
KUBOTA ENGINE AMERICA Service
Training
Intake & Exhaust Manifolds:
Exhaust manifolds are shielded and engineered for higher temperatures
Intake manifolds use longer runners
KUBOTA ENGINE AMERICA Service
Training
Positive Crankcase Ventilation (PCV) System:
PCV Valve
Controls amount of blow-by gas and fresh air.
KUBOTA ENGINE AMERICA Service
Training
Flywheel: The WG1605 flywheel is designed to work alongside the crankshaft sensor.
KUBOTA ENGINE AMERICA Service
Training
Fuel Delivery Pipe and Injectors: ECU controlled fuel delivery (pulse width modulated).
Port Fuel InjectionFuel Pressure 40 – 45 PSI**(can fluctuate between 35-75#)
KUBOTA ENGINE AMERICA Service
Training
Three Way Catalyst: A 3-way catalyst oxidizes:
(1)HC CO2 and H20
(2) CO CO2
(3) NOx N2
KUBOTA ENGINE AMERICA Service
Training
Electronic Control Unit, ECU:
Utilizes inputs from the engine sensors to precisely meter fuel, control speed and remain emission compliant.
KUBOTA ENGINE AMERICA Service
Training
Ignition Coil: ECU controlled inductive coils.
As primary windings dwell then collapse, the secondary windings yield a high voltage output via the spark plug.
KUBOTA ENGINE AMERICA Service
Training
Fuel lines are bold black color. Electrical circuits are thick
black.
Gasoline System:
KUBOTA ENGINE AMERICA Service
Training
Press/Temp Sensor
Manifold
Return
Inlet
Outlet
Fuel Pressure Manifold, FPM:
KUBOTA ENGINE AMERICA Service
Training
Fuel Inlet
Fuel Outlet
Coolant Primary
Secondary
Regulator performs 2 functions: Vaporizes liquid fuel Regulates fuel pressure
Only maintenance is periodic draining See maintenance schedule
Dual Stage Regulator, DSR:
Test Port
KUBOTA ENGINE AMERICA Service
Training
Stand alone module Controlled via CAN from ECU Contains:
Control ModulePressure/Temp. sensorFast acting solenoid valve
DEPR (Direct Electronic Pressure Regulator):
KUBOTA ENGINE AMERICA Service
Training
Oil Pressure Switch: If oil pressure falls below specification, the warning lamp will illuminate. (ECU pin 35) Note: water ingress may also cause the contacts to corrode and cause false illumination, especially with LEDs.
KUBOTA ENGINE AMERICA Service
Training
Oil Pressure Switch: Standard Kubota Oil Pressure Switch:
Closed: 0-7 psiOpen > 7psi
KUBOTA ENGINE AMERICA Service
Training
Electronic Throttle Body, ETB
ECU controlled, electronic motor driven mechanical throttle body connected to the intake.
KUBOTA ENGINE AMERICA Service
Training
Electric motor connected to throttle.
ECU controlled based on foot pedal input.
Electronic Throttle Body, ETB
KUBOTA ENGINE AMERICA Service
Training
Oxygen (O2) Sensor: Pre and Post catalyst feedback control for precise air-fuel ratio management.
4 wire sensor including heater.
KUBOTA ENGINE AMERICA Service
Training
Heated for more accuracy, beyond exhaust temps.
HEGO1 (pre-cat) senses rich/lean to adjust fuel mixture.
HEGO2 (post-cat) checks catalyst for efficiency.
Oxygen (O2) Sensor:
KUBOTA ENGINE AMERICA Service
Training
Bosch LSF4 sensor Pre-cat used for closed loop fuel control Used as a rich-lean switch Only 1 DTC: EGO 1 Open/Lazy
Pre-Cat O2 Sensor:
KUBOTA ENGINE AMERICA Service
Training
Bosch LSF4 sensor Post-cat used mainly for catalyst efficiency checking Post cat O2 failure should not cause an engine running
problem Only 1 DTC: EGO 2 Open/Lazy
Post-Cat O2 Sensor:
KUBOTA ENGINE AMERICA Service
Training
Temperature and Manifold Absolute Pressure Sensor: TMAP.
Mounted in the intake manifold and provides ECU data to calculate air flow pressure and density.
KUBOTA ENGINE AMERICA Service
Training
Combines both intake air temperature and intake manifold pressure
Will compensate for intake temperature, altitude, and air cleaner restriction
Temperature and Manifold Absolute Pressure Sensor:
KUBOTA ENGINE AMERICA Service
Training
Crankshaft Position Sensor:
Provides engine RPM information to the ECU.
KUBOTA ENGINE AMERICA Service
Training
Camshaft Position Sensor: Identifies which cylinders are in compression to begin spark timing.
KUBOTA ENGINE AMERICA Service
Training
Knock Sensor: Early detonation detection via mechanical vibration at the cylinder head/block deck level.
KUBOTA ENGINE AMERICA Service
Training
Reacts with a specific frequency from detonation.
When knock is detected, voltage output is increased.
ECU retards ignition timing.
Installed sensor at 35 – 50 degrees from vertical.
Knock Sensor:
KUBOTA ENGINE AMERICA Service
Training
Service ToolE-Com Interface Device
Connects between USB port and connection on engine
Can be connected any time, engine running or not
KUBOTA ENGINE AMERICA Service
Training
Service ToolSoftware
Interface available through KEA’s Parts Department.
Software is Free, and available for download through K-ISS.