TIAGO

1.05L REVOTORQ ENGINE 87 B. HP PUMP The High pressure pump delivers in each operating point the required fuel amount and controls the rail pressure according to the demand of the ECU. HP pumps draws fuel from the fuel tank through the water Sedimentor and the fuel filter. It supplies high pressure fuel (up to 1600 bar) to the injectors. It has got inlet metering valve and in- built feed pump, integrated pressure limiter and integrated fuel temperature sensor. This pump is driven by the engine timing belt and controlled by EMS ECU based on the various operating parameters. C. FUEL RAIL It is a fuel reservoir where the fuel is maintained at a pressure of about 1600 bar. The fuel is pumped into it from the HP pump and gets delivered to the injectors through the HP lines. It is also fitted with a high pressure sensor and the signal is used by EMS ECU to maintain the fuel pressure. NOTE Whenever fuel rail is removed from the engine, always cover the inlet and outlet openings of the rail with the protective caps. D. FULE PRE-FILTER (SEDIMENTER) The water Sedimenter is a part of the filtration system. It is fitted in the fuel feed system to filter the water present in the fuel. It can store water up to 120cc. The sensor fitted in the sedimentor gets triggered once the water level approaches its maximum limit. This trigger is displayed as a warning in the instrument panel. For more details on the sensor refer EMS Section in this group. E. MAIN FUEL-FILTER The Fuel filter is fitted as a second filtering step in the fuel feed system. It is mainly used to filter out particles that are present in the fuel.