Kubota Engine Training: WG1605, spark ignited

1 Kubota Engine AMERICAS ervice TrainingKubota Engine training : wg1605 , spark ignited Kubota Engine AMERICAS ervice TrainingWG1605 Engine training : System Overviews Mechanical Components Electronic Components and Sensors Operation Service ToolKUBOTA Engine AMERICAS ervice TrainingFuel System Overview: Kubota Engine AMERICAS ervice TrainingFuel System Overview: Kubota Engine AMERICAS ervice TrainingSystem Overview - Gaseous: ECI ECMLPG TANKFUELFILTERELECTRICLOCK OFFMANUALVALVEDUAL STAGEREGULATOREPRMIXERAIR FILTRATIONSYSTEMETBINTAKE MANIFOLDEXHAUST MANIFOLDCATALYSTECTOILTMAPIGNITIONCOIL PACKCCKCPKHEGOHEGO- +BATTERYSTARTERALTERNATORINSTURMENTPANEL TPS 1&2 KNKCANFRESH AIRLIQUID FUEL HIGH PRESSURELOW PRESSURE FUELAIR FUEL MIXTUREENGINE COOLANTEXHAUST GASESECI00001 REV AKUBOTA Engine AMERICAS ervice TrainingSystem Overview - Gasoline: Kubota Engine AMERICAS ervice TrainingSystem Overview - Dual Fuel.

2 ECI ECMLPG TANKFUELFILTERELECTRICLOCK OFFMANUALVALVEDUAL STAGEREGULATOREPRMIXERAIR FILTRATIONSYSTEMETBINTAKE MANIFOLDEXHAUST MANIFOLDCATALYSTECTOILTMAPIGNITIONCOIL PACKCCKCPKHEGOHEGO- +BATTERYSTARTERALTERNATORINSTRUMENTPANEL TPS 1&2 KNKCANFRESH AIRLIQUID LPG FUEL HIGH PRESSURELPG LOW PRESSURE FUELLPG AIR FUEL MIXTUREENGINE COOLANTEXHAUST GASESECI00003 REV AGASOLINE FUEL RAILGASOLINETANKFUELFILTERELECTRICFUELPU MPRETURNLESSFUELPRESSUREREGULATORSELECTS W ITCHFPPGASOLINE SUCTIONGASOLINE PRESSUREGASOLINE REGULATEDKUBOTA Engine AMERICAS ervice TrainingMechanical Components: wg1605 engines are similar to V1505.

3 Some differences include: Intake and exhaust manifolds. Positive Crankcase Ventilation system. Pistons. Cylinder heads and valves. Crankcase, Camshaft. Kubota Engine AMERICAS ervice TrainingIntake & Exhaust Manifolds: Exhaust manifolds are shielded and engineered for higher temperatures Intake manifolds use longer runnersKUBOTA Engine AMERICAS ervice TrainingPositive Crankcase Ventilation (PCV) System: PCV ValveControls amount of blow-by gas and fresh air. Kubota Engine AMERICAS ervice TrainingPistons and Rings: Dished pistons are the main combustion chamber. (Gaseous compression ratios are nearly a third of a comparable diesel.)

4 To p R i n g : Barrel ShapeSecond Ring: Ta p e r e dOil Control Ring Kubota Engine AMERICAS ervice TrainingCylinder Head and Valves: spark plugs are recessed in head, and protrude into the main combustion chamber. Valves are equipped with special heat resistant alloy. Kubota Engine AMERICAS ervice TrainingPiston Recession Example: Kubota Engine AMERICAS ervice TrainingCross-Flow Cylinder Head: Low heat conduction between intake and exhaust Engine AMERICAS ervice TrainingCamshaft: The camshaft s timing pin (5), is attached to the gear (4). Kubota Engine AMERICAS ervice TrainingGear shaft: The gear shaft deletes the fuel cam from the 05-E3B Engine .

5 Kubota Engine AMERICAS ervice TrainingFlywheel: The wg1605 flywheel is designed to work alongside the crankshaft sensor. Kubota Engine AMERICAS ervice TrainingFuel 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 AMERICAS ervice TrainingFuel Delivery Pipe and Injectors: Kubota Engine AMERICAS ervice training 12-Volt operation 2-wire injector Pulse-width modulation ECU Controlled ground driver. Fuel Delivery Pipe and Injectors: Kubota Engine AMERICAS ervice TrainingThree Way Catalyst: A 3-way catalyst oxidizes: (1)HC CO2 and H20 (2) CO CO2 (3) NOx N2 Kubota Engine AMERICAS ervice TrainingElectronic Control Unit, ECU: Utilizes inputs from the Engine sensors to precisely meter fuel, control speed and remain emission compliant.

6 Kubota Engine AMERICAS ervice TrainingElectronic Control Unit, ECU: Kubota Engine AMERICAS ervice TrainingECU Wiring Diagram: Kubota Engine AMERICAS ervice TrainingECU Inputs and Outputs: Kubota Engine AMERICAS ervice TrainingIgnition 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 AMERICAS ervice TrainingIgnition Coil: Kubota Engine AMERICAS ervice training Fuel lines are bold black color. Electrical circuits are think black. Gasoline System: Kubota Engine AMERICAS ervice TrainingVariable controlled by ECU.

7 Electric Fuel Pump: Kubota Engine AMERICAS ervice TrainingElectric Fuel Pump: Kubota Engine AMERICAS ervice training Power to pump supplied by ECU controlled relay. Fuel pump is Pulse Width Modulated (PWM) through ECU. Electric Fuel Pump: Kubota Engine AMERICAS ervice TrainingPress/Temp SensorManifoldReturnInletOutletFuel Pressure Manifold, FPM: Kubota Engine AMERICAS ervice TrainingFuel Pressure Manifold, FPM: Kubota Engine AMERICAS ervice TrainingPropane / Butane ratio chart. Depending on energy content, spark timing is adjusted. LPG Fuel Content: Note: pressure at low temperatures.

8 Kubota Engine AMERICAS ervice Training1. Liquid Output2. Quick Fill Valve3. Safety Valve4. 80% Fill Valve5. Gauge6. Vapor Pickup Tube7. 80% Fill Valve Tube8. Gauge Float9. Liquid Pickup TubeLPG Tank and Filter: Kubota Engine AMERICAS ervice TrainingPilot Normally closed. Grounded provided by ECU. Pilot opens, allowing pressure to outlet side. Pressure begins to equalize and main valve opens fully. Lock Off Valve: Kubota Engine AMERICAS ervice training No electrical fault codes for Off Valve: Kubota Engine AMERICAS ervice TrainingFuel InletFuel OutletCoolantPrimarySecondary Regulator performs 2 functions: Vaporizes liquid fuel Regulates fuel pressure Only maintenance is periodic draining See maintenance scheduleDual Stage Regulator, DSR: Te s t P o r tKUBOTA Engine AMERICAS ervice TrainingDSR Exploded View: Kubota Engine AMERICAS ervice TrainingKUBOTA Engine AMERICAS ervice training Stand alone module Controlled via CAN from ECU Contains: Control Module Pressure/Temp.

9 Sensor Fast acting solenoid valveDEPR (Direct Electronic Pressure Regulator): Kubota Engine AMERICAS ervice TrainingCavityColorFunction1 WTCAN Termination2DB/PKCAN H3PK/DGPower Relay Output4 BKGround5DB/WTCAN L6RD/TNB+ from Fuse 2 DTC s are communicated to ECU via CAN Harness pin out shown below (terminal view of Engine harness) No user serviceable parts insideDEPR Electrical: Kubota Engine AMERICAS ervice TrainingKUBOTA Engine AMERICAS ervice training All mechanical unit No electrical/electronic controlsMixer: Kubota Engine AMERICAS ervice TrainingKUBOTA Engine AMERICAS ervice TrainingEngine Coolant Temperature: Kubota Engine AMERICAS ervice training Temperature Sensor Senses Engine temperature for running and shut-downEngine Coolant Temperature: Kubota Engine AMERICAS ervice TrainingOil Pressure Switch: If oil pressure falls below specification, the warning lamp will illuminate.

10 (ECU pin 35) Note: water ingress may also cause the contacts to corrode and cause false illumination, especially with LEDs. Kubota Engine AMERICAS ervice TrainingOil Pressure Switch: Standard Kubota Oil Pressure Switch: Closed: 0-7 psiOpen > 7psi Kubota Engine AMERICAS ervice TrainingElectronic Throttle Body, ETBECU controlled, electronic motor driven mechanical throttle body connected to the intake. Kubota Engine AMERICAS ervice training Electric motor connected to throttle. ECU controlled based on foot pedal Throttle Body, ETBKUBOTA Engine AMERICAS ervice TrainingElectronic Throttle Body, ETB Dual throttle position sensors, FPP1 and FPP2.