|
Single-cylinder spark ignition engines on module plates for
fixation on a MPW 5 Modular engine test bed.
Both engines are equal except for their compression ratio
(CR).
1. CR = 8.5 is the original value.
2. CR = 10 is a modification.
Both engines are equipped with special features for the
following measurements:
Fuel
consumption metering:
- Quick-connection coupling (1),
which can be coupled to an external fuel tank on a balance.
Exhaust gas analysis:
- Flange (2) on the
original exhaust gas silencer for fixation of a flexible metal hose
which is equipped by one outlet and one inlet tube for exhaust gas
extraction and recirculation.
Pressures related to the engine's working cycle:
- Cylinder pressure:
- The original spark plug has been
replaced by a measuring spark plug which is connected to the charge
amplifier.
- The crankshaft position is detected
by a resolver disc (3)
and two pick-ups.
- Sensors for the absolute pressure
in the inlet duct after the throttle and in the exhaust
gas flow (4).
Temperatures:
- Thermocouples under the spark plug
(cylinder head temperature) and in the exhaust gas flow (5).
Adjusting devices for
- advance of ignition,
- air - fuel ratio (rich/lean mixture).
| 
