Engine control system and method
AssigneeCummins Intellectual Properties, Inc.
InventorsConor A. Leehaug, Joseph H. Scott, Andrew H. Bazan, Jiuzhu Yi
Life of this patent
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Abstract
An engine control strategy for a marine vessel propulsion system receives a request for a gear from among plural transmission gears, determines an engine speed for the requested transmission gear shift, adjusts the engine to the determined speed for a predetermined amount of time, and prevents the requested transmission gear shift from occurring for the predetermined amount of time while maintaining the engine at the predetermined speed. After the predetermined amount of time elapses, the requested shift is allowed to occur.
Claims15
An engine control system of a marine vessel propulsion system, comprising:
- a shifter and throttle control including movable element that generates a signal indicating a requested gear from among plural transmission gears and an engine throttle level corresponding to a position of the movable element;
- a controller connected to the shifter and throttle control and to an engine of the marine vessel propulsion system to monitor and control the speed of the engine, said controller adapted to receive the shift and throttle request signal and to maintain the engine at a predetermined speed for a predetermined amount of time in response to the received request;
- and
- a shift actuator moveably coupled to a clutch member operable to engage and disengage the requested transmission gear with a propulsion element,
- wherein the controller prevents the actuator from performing the requested shift for the predetermined amount of time while the engine is maintained at the predetermined speed, and allows the requested shift to occur after the predetermined amount of time elapses.
A method of controlling an engine of a marine vessel propulsion system, comprising:
- receiving a signal indicating a requested transmission gear shift and an engine throttle level;
- determining an engine speed for the requested transmission gear shift and adjusting the engine to the determined speed for a predetermined amount of time;
- preventing the requested transmission gear shift from occurring for the predetermined amount of time while maintaining the engine at the predetermined speed;
- and
- allowing the requested shift to occur after the predetermined amount of time elapses.
Dependencies are inferred from the claim text.