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Overview (Structure and Operating Principle)
FP-4135 On-Board Volumetric Flow Detector
1.
Overview (Structure and Operating Principle)
In this section, the product overview, the flow rate and the operating principle of rotation conversion part of the FP-4135
On-Board Volumetric Flow Detector is detailed.
1.1 Product overview
The FP-4135 On-Board Volumetric Flow Detector is the high-precision positive displacement flow detector to measure
the fuel flow rate of liquids such as gasoline, light oil and kerosene combined with the Ono Sokki DF-2200 On-Board
Flow Meter or the FM Series Digital Flowmeter.
Because the flow rate range is as wide as 0.1 to 200 L/h (measurement range ratio 2000:1), it can measure, for
example the fuel efficiency of an engine from very low flow rate in an idling state to a high-load state when a fuel with a
low heating value such as alcohol is used.
Also, because the flow detecting part is compact and its operating temperature range is -30 to +100°C, it can be
installed inside an engine to measure the actual driving fuel efficiency.
1.2 Structure and operating principle
4 pistons are installed in a radial fashion on the flow rate detecting part of the equipment where they repeat a back
and forth motion with the liquid flowing in and out of the inlet/outlet. The movement of pistons is converted to a rotating
motion by the crank shaft and transfered to the rotation detecting part.
Then, a pulse signal corresponding to movement amount of the pistons is generated by the rotary encoder of the
rotation detecting part and the instantaneous value or accumulated flow rate are displayed on the calculated display
section of the Ono Sokki DF-2200 On-Board Flow Meter or the FM Series Digital Flowmeter.
The output pulse signal consists a pair of pulses with different phases so that the rotation direction can be recognized.
Because of that, correct measurement is possible regardless of whether the flows are reversed or pulsed.
E4
P4
E3
P3
E2 P2
P1
E1
(a)
(b)
(c)
(d)
Connecting rod
Crank shaft
PST1
PST3
PST2
PST4
E1 to 4
: Port to connect to flowmeter outlet
PTS1 to 4 : Piston 1 to 4
P1 to 4
: Port to connect to head cylinder of pistons 1 to 4
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