GAC ESD-5556 기술 정보 - 페이지 4

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GAIN and STABILITY adjustments may require minor changes after engine load is applied.

Normally, adjustments made at no load achieve satisfactory performance. A strip chart

recorder can be used to further optimize the adjustments.

If instability cannot be corrected or further performance improvements are required, refer below to

the SYSTEM TROUBLESHOOTING section.

Starting Fuel Adjustment

The engine's exhaust smoke at start-up can be minimized by completing the following

adjustments:

Place the engine in idle by connecting Terminals M & G.

Adjust the IDLE speed for as low a speed setting as the application allows.

Adjust the STARTING FUEL CCW until the engine speed begins to fall. Increase the

STARTING FUEL slightly so that the idle speed is returned to the desired level.

Stop the engine.

Method 1

Start the engine and accelerate directly to

the operating speed

(Gen Sets, etc.).

Remove the connection between Terminals

M & G.

Start the engine and adjust the SPEED

RAMPING for the least smoke on

acceleration from idle to rated speed. If the

starting smoke is excessive, the

STARTING FUEL may need to be adjusted

slightly CCW.

If the starting time is too long, the

STARTING FUEL may need to be adjusted

slightly CW.

Idle Speed Setting

If the IDLE speed setting was not adjusted as detailed in 'Starting Fuel Adjustment' section, then

place the optional external selector switch in the IDLE position. A CW adjustment to the IDLE

adjustment control will increase the idle speed set point. When the engine is at idle speed, the

speed control unit applies droop to the governor system to insure stable operation.

Technical Information

Method 2

Start the engine and control at an idle speed

for a period of time prior to accelerating to

the operating speed. This method separates

the starting process so that each may be

optimized for the lowest smoke emissions.

Replace the connection between Terminals

M & G with a switch, usually an oil pressure

switch.

Start the engine.

If the starting smoke is excessive, the

STARTING FUEL may need to be adjusted

slightly CCW.

If the starting time is too long, the

STARTING FUEL may need to be adjusted

slightly CW.

When the switch opens, adjust the SPEED

RAMPING for the least amount of smoke

when accelerating from idle speed to rated

speed.