Honda-The Power of Dreams
Honda Releases the iGX440 Next-Generation General Purpose Engine with Electronic Control Technology—a World’s First

TOKYO, Japan, April 20, 2005–Honda Motor Co., Ltd. announced the release of the iGX440 next-generation general purpose engine (max. output: 15hp; displacement: 438cm3), the world’s first single-cylinder general purpose engine to feature electronic engine speed control technology. The new engine will become available in Japan to power product manufacturers starting in July.


iGX440 next-generation general purpose engine


The iGX440 employs Honda’s newly developed world’s-first1 electronic governor2 (STR3 GOVERNOR) electronic engine speed control technology, which eliminates the need for a battery. The electronic governor system allows the ECU (Electronic Control Unit) to continuously monitor throttle opening and engine speed, electronically regulating throttle opening to maintain a constant engine speed even under changing engine load conditions. This intelligent control technology permits selection of the appropriate engine speed characteristics and the setting of optimum maximum and idling rpms for power products fitted with the iGX440. Also, the power product’s ECU can communicate with the engine’ ECU and control its speed, making the power product easier to operate.

In addition, an auto fuel valve4 and auto choke5 eliminate the need for the operator to open and close the fuel valve or adjust the choke, for a significant improvement in ease of operation.

The iGX440 also boasts environmental performance among the best in the world, achieving emissions levels approximately 30% less1 than those stipulated by the US Environmental Protection Agency’s Phase 2 emission standardsand the California Air Resources Board Tier II emissions standards—the most stringent in the world. Fuel economy has been improved over engines of the same class6 by approximately 15%7, and noise reduced by approximately 4dB(A)8.

In the future, Honda intends to expand its lineup of iGX-series engines employing this intelligent technology, to set a new standard in next-generation general purpose engines.

1 According to Honda survey
2 Governor: a device that regulates engine speed (maintains a constant engine speed, despite load fluctuations)
3 Self Tuning Regulator: self-adjusting device
4 Auto fuel valve: a device that automatically turns the fuel supply on and off in accordance with engine operation.
5 Auto choke: a device that automatically limits air intake during engine startup to enrich the air-fuel mixture.(equipped as standard to starter motor type)
6 15-horsepower class
7 When operating in EPA mode for one hour
8 EU noise regulations, operating in generator measurement mode


Main Features of the iGX440
World’s first1 electronic governor2 (STR3 GOVERNOR)
  The newly developed world’s-first1 electronic governor system features a power coil9 which generates electricity to start the ECU, making a battery unnecessary. This governor system allows the ECU to continuously monitor throttle opening and engine speed, electronically regulating throttle opening to maintain a constant, stable engine speed even under changing load conditions. Engine speed characteristics can be selected from among nine different settings, and maximum and idling rpm settings freely changed to suit power products fitted with the iGX440, making it readily adaptable to a variety of different applications.
 
· Maintenance of constant engine speed
The ECU precisely controls engine speed to ensure a minimum of variations from the set speed fluctuations due to ambient temperature, engine break-in, or load.

· DBW (Drive-By-Wire)
All control systems are electronically connected by wire. This makes operation easier and allows one-touch connection between the power products switch and the engine via a coupler connection for remote-controlled engine speed adjustment.

· Engine control communications
Communication between the engine’s ECU and the power product’s ECU allows the power product to control engine speeds for improved operability.

· Self-diagnostic function
A blinking LED provides error confirmation and facilitates easy troubleshooting diagnosis. Connecting the engine to a personal computer provides a more detailed diagnosis, allowing the operator to check the engine’s operating history (operating time, number of startups, warnings, faulty operation reports, etc.).
 
9 Power coil: an electrical coil installed on the engine to start the ECU.

Ease of use
  An automatic fuel valve4 that eliminates the need to open and close the valve manually when starting and stopping the engine, adjustment-free auto choke5, air cleaner made of new material for a longer maintenance interval, large-diameter filler mouth for easier gas fill-ups, and other features contribute to improved ease of operation
Environmental performance
  The iGX440 achieves emissions levels around 30% less1 than those stipulated by the US Environmental Protection Agency’s Phase 2 emission standards and the California Air Resources Board Tier II emissions standards—the most stringent in the world. Its environmental performance is among the highest in the world. Fuel economy has also been improved over engines of same class6 by approximately 15%7, and noise reduced by approximately 4dB(A)8

Specifications

 
Model iGX440
Type Air-cooled, 4-stroke, single-cylinder gasoline (OHC)
Displacement (cm3) 438
Length × Width × Height (mm) 407 × 505 × 454
Fitted weight (kg) 45
Dry weight (kg) 39
Cylinders / Bore × Stroke (mm) 1 / 88 × 72.1
Max. power (gross) [kW(PS) / rpm] 11.2(15) / 3,600
Direction of rotation Left (viewed from output shaft side)
Fuel Unleaded automobile gasoline
Fuel tank capacity (l) 6.5
Lubricating oil capacity (l) 1.1
Carburetor Butterfly
Ignition CDI
Governor system Electronic (STR GOVERNOR)
Starting system Recoil starter Starter motor
Choke Manual Automatic
Fuel valve Automatic Automatic