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CONTROL SYSTEM
TNV Application Manual
2-3
This chapter describes a Yanmar second-generation electronic governor (herein referred to as the "Gen2
Eco-governor") that conforms to the third EPA regulation by controlling Exhaust Gas Recirculation (EGR).
The Gen2 Eco-governor is standard equipped on NV3 and supercharged engines. It is also available as an
option for other engines. Contact Yanmar for details.
The engine electronic control unit (E-ECU) controls the speed and power of the engine by adjusting the rack
position of the fuel injection pump depending on the signal from the accelerator sensor.
The opening of the EGR valve is adjusted depending on the engine speed and load factor so as to ensure
conformance to exhaust emission standards.
The Gen2 Eco-governor provides control to the engine depending on the throttle position, coolant
temperature, external-switch positions, signals through CAN or other parameters and is superior to a
mechanical governor in versatility.
This manual provides overall description of the Gen2 Eco-governor. Optional setting of the E-ECU must be
done by Yanmar. Contact Yanmar for details.
PRECAUTIONS ON THE USE OF ELECTRONIC CONTROL
COMPONENTS
Engine control unit
Read
carefully before designing a engine control system comprising the engine
electronic control unit (E-ECU) and other control components in order to ensure correct application of the
components.
Observe precautions in
when designing wire harnesses.
Be sure to perform installation assessment as specified by Yanmar to ensure applicability of the E-ECU and
other control components to the intended machine.
At the first power-up, the E-ECU is initialized and cannot be used to start the engine. See
initialization of the E-ECU (P.14)
for details.
Be sure to use the E-ECU in conjunction with engines, the type and serial number of which are specified by
Yanmar. Failure to do so will result in no assurance that the engine develops the intended performance.
Never use the E-ECU if the failure lamp is flashing. Doing so will result in no assurance that the engine
develops the intended performance and may cause serious damage to the engine.
Place the failure lamp and other indictors so that they are readily visible to personnel.
When replacing the E-ECU, be sure to contact Yanmar in advance. The fuel injection quantity data must be
transferred from the old E-ECU to the new unit. See
for details. If the fuel injection
quantity data is not transferred to the new E-ECU, the engine is not assured to develop the intended
performance.
Updating the fuel injection quantity data in the E-ECU requires a Yanmar genuine service tool. See the
manual for the service tool for the maintenance procedure.
The customer must not perform tasks that are specified to be done by Yanmar, including replacement of the
E-ECU, rewriting or modification of data in the E-ECU and removal of sensors or actuators. Such tasks done
by the customer may be deemed an infringement of exhaust emission control laws and regulations. Yanmar
assumes no responsibility for any loss or damage caused by incompliance with instructions or suggestions
in this chapter.
00_Electronic_Control_System.book 3 ページ 2006年5月29日 月曜日 午後2時12分
Summary of Contents for Yanmar 3TNV82A-B
Page 95: ...CONTROL SYSTEM 2 76 TNV Application Manual 00_Electronic_Control_System book 76...
Page 96: ...Appendix Standard harness 1 00_ _E fm 1...
Page 97: ...Appendix Standard harness 2 00_ _E fm 2...
Page 98: ...TNV Series service tool Operation Manual...
Page 132: ...32 7 Main Menu Figure 7 15 Data Logging Data Monitor Screen...
Page 145: ...7 Main Menu 45 Figure 7 27 System Installation Configuration Screen...