Diesel Engine Troubleshooting

Rail Pressure Limiter

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The pressure limiter opens to release the pressure if abnormally high pressure is generated. If pressure within the rail becomes abnormally high, the pressure limiter operates (opens). It resumes operation (closes) after the pressure falls to a certain level. Fuel released by the pressure limiter returns to the fuel tank.

The operating pressures for the pressure limiter depend on the vehicle model and are approximately 140-230MPa for the valve opening pressure, and approximately 30-50MPa for the valve closing pressure.

pic1 64 Rail Pressure Limiter

Written by Jack

March 7th, 2019 at 12:53 am

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