L23/30H
Safety System
As standard the engine is equipped with a pneumatically/mechanically overspeed device, which starts to operate if the maximum permissible RPM is exceeded. This device is fitted to the end cover of the engine driven lubricating pump and is driven from the pump through a resilient coupling.
Press down |
Emergency |
ß |
start valve |
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Fig 2 Emergency start valve.
When the maximum permissible RPM is exceeded, the overspeed device will activate a pneumatically controlled lambda controller, which will bring the fuel index to zero and stop the engine.
Emergency Starting Valve
The emergency starting valve is activated by means of a screw-driver or similar as illustrated in fig 2.
Pneumatic Start Sequence
When the starting valve is opened, air will be supplied to the drive shaft housing of the air starter.
The air supply will - by activating a piston - bring the drive pinion into engagement with the gear rim on the engine fly wheel.
When the pinion is fully engaged, the pilot air will flow to, and open the main starting valve, whereby air will be led to the air starter, which will start to turn the engine.
When the RPM exceeds approx. 140, at which firing has taken place, the starting valve is closed whereby the air starter is disengaged.
