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Boost pressure is relative to absolute pressure - as one increases or decreases, so does the other. It is a one-to-one relationship with an offset of -100 kPa for boost pressure. Thus, a MAP sensor will always read 100 kPa more than a boost sensor measuring the same conditions. A MAP sensor will never display a negative reading because it is ...
Fuel pressure (gauge pressure) 0 765 kPa 0B: 11: 1 Intake manifold absolute pressure 0 255 kPa 0C: 12: 2 Engine speed 0 16,383.75 rpm + 0D: 13: 1 Vehicle speed 0 255 km/h 0E: 14: 1 Timing advance -64 63.5 ° before TDC: 0F: 15: 1
At to high basic charging pressure a negative adaptation occurs and maximum charging pressure cannot be achieved. In addition there is a substantial risk of engine damage since the charging pressure can’t be lowered enough when regulating with attention to pre ignition/pinging. Basic charging pressure shall be 0,40 ±0,03 bar (5,80 ±0,43 PSI).
The Trionic 5.2 and 5.5 systems utilized the manifold absolute pressure (MAP) sensor and the intake air charge temperature sensor to calculate the fuel injection curves, while the Trionic 7 and 8 systems are mass air flow type. Both systems have substantial differences that prevent utilization of components between the two.
Absolute pressure is zero-referenced against a perfect vacuum, using an absolute scale, so it is equal to gauge pressure plus atmospheric pressure. Absolute pressure sensors are used in applications where a constant reference is required, like for example, high-performance industrial applications such as monitoring vacuum pumps, liquid pressure ...
Fuel pressure gauge - Indicates the supply pressure of fuel to the carburetor (or in the case of a fuel-injected engine, to the fuel controller.) Fuel boost pump switch - Controls the operation of the auxiliary electric fuel pump to provide fuel to the engine before it starts or in case of failure of the engine-powered fuel pump.
It was designed for ignition control only and it can be considered as a light version of the SECU-3T unit. However, it contains built-in drivers for ignition coils, as well as manifold absolute pressure (MAP) sensor. Regarding the software, it is fully compatible with the SECU-3T unit. SECU-3 Micro. [4]
Air changes its density with temperature and pressure. In automotive applications, air density varies with the ambient temperature, altitude and the use of forced induction, which means that mass flow sensors are more appropriate than volumetric flow sensors for determining the quantity of intake air in each cylinder.