An exhaust system for a marine outboard engine including an engine having an engine exhaust port. The exhaust system includes a first exhaust port, a second exhaust port vertically higher than the first exhaust port, a first passage for fluidly connecting to the engine exhaust port and fluidly connected to the first exhaust port, a second passage fluidly connected between the first passage and the second exhaust port, a catalytic converter defining at least in part the second passage, a valve operable to at least partially close the first passage to respectively reduce and increase flow of exhaust gas to the first exhaust port and the second exhaust port, a valve actuator operatively connected to the valve, and a controller operatively connected to the valve actuator for controlling a position of the valve based at least in part on a speed and a throttle request of the engine.
Exhaust system for a marine outboard engine
2020-12-29
Patent
Electronic Resource
English
Outboard marine propulsion devices and exhaust systems for outboard marine propulsion devices
European Patent Office | 2016
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