Method and arrangement for controlling a ship propulsion system
In a method for controlling a ship propulsion system wherein, in a first operating mode, the position of a command signal generator within a guide range including a forward and a reverse section is interpreted by a system controller as a desired power output as well as a desired travel direction, a second operating mode is provided wherein the position of the command signal generator is ignored as power output command so that the position of the command signal generator forms only as directional control device and wherein in either mode of operation, the command signal generator is automatically returned to a neutral position when the command signal generator is released by an operator.
1. A method for controlling a ship propulsion system ( 1 ) having a first mode of operation (MOD 1 ) with a command signal generator ( 2 ) including a guide range (TB) with a neutral position (N), a forward position section (PB(VW)) and a reverse position section (PB(RW)) wherein the position of the command signal generator ( 2 ) in the forward or reverse position section of the guide range (TB) is interpreted by a system controller ( 3 ) as desired value (SL) for power output and for the travel direction for the ship propulsion system ( 1 ), said ship propulsion system ( 1 ) including a second mode of operation (MOD 2 ) wherein the position of the command signal generator ( 2 ) within the guide range (TB) as desired value SL for the ship propulsion system ( 1 ) is ignored (SL=0), that is, the signal generator is in any position thereof, in the forward or in the reverse section (PB(VW) or respectively PB (RW)) interpreted only as desired value (SL) for the travel direction of the ship propulsion system and wherein, in the first operating mode (MOD 1 ) as well as in the second operating mode (MOD 2 ), the command signal generator ( 2 ) is returned to the neutral position (N) when released by an operator while it is in the guide range (TB).
2. The method according to claim 1 , wherein the first mode of operation (MOD 1 ) as well as the second mode of operation (MOD 2 ) are manually set by the ships operator.
3. The method according to claim 1 , wherein the first mode of operation (MOD 1 ) is set when the speed (v) of the ship reaches at least a value (GW), v≧GW) or if the second mode of operation is set while the speed (v) of the ship is below the limit value (GW) v<GW.
4. The method according to claim 1 , wherein an actual position of the ship is determined via a GPS system and the first mode of operation (MOD 1 ) or the second mode of operation (MOD 2 ) is set based on the actual position of the ship, particularly if the actual position of the ship is in a harbor.
5. The method according to claim 1 , wherein, in a ship propulsion system with several consoles each including a command signal generator ( 2 ), the signal generators not actuated by the ship operator follow the command signal generator operated by the ship operator.
6. The method according to claim 1 , wherein the guide range (TB) is determined by a mechanical guide structure including a first detent (RVW) in the forward direction as well as second detent (RRW) in the reverse direction and a command signal transmitter ( 17 ) is provided which includes a v-shaped guide profile between the first and second detents (RVW, RRW) for returning the command signal generator to the neutral position (N) in the center of the v-shaped profile.
7. The method according to claim 1 , wherein the command signal generator ( 2 ) is provided with an electrical drive unit which imitates a mechanical detent in forward direction as well as a mechanical detent in the reverse direction and via which returns the command signal generator ( 2 ) to the neutral position N if the command signal generator ( 2 ) is released while in the guide range (TB).