A combined engine system is disclosed which may help to meet electrical power demand of a common load that can vary in an unpredictable manner. The system comprises at least one primary engine and one or more secondary engines. An after-treatment system is connected to the engines to receive exhaust flow from each of the engines. A controller is configured to operate the system in a first operating mode when only the primary engine is running and a second operating mode when the secondary engines are run together with the primary engine. Exhaust flows from each of the engines are passed through the after-treatment system which allows the after-treatment system to be heated by the exhaust flow of the primary engine before receiving exhaust flows from the secondary engines.

An engine controller to control a plurality of engines is disclosed. The engine controller may determine that power to a load is to be increased, wherein the load is configured to be powered by one or more of the plurality of engines; determine that an engine, of the plurality of engines, is configured to provide supplemental power to the load after a temperature of the engine satisfies a threshold, wherein the threshold corresponds to a warm-up operation of the engine being completed; determine that the temperature of the engine does not satisfy the threshold; obtain, via an operator interface, an authorization to bypass the warm-up operation of the engine; and bypass, based on obtaining the authorization, the warm-up operation for the engine to permit the engine to provide instantaneous power to the load.

In a control system for an internal combustion engine, the internal combustion engine includes a first exhaust catalyst that is a three-way catalyst disposed in an exhaust path of the internal combustion engine, a second exhaust catalyst that is a three-way catalyst disposed in the exhaust path on a downstream side of the first exhaust catalyst, and a motor configured to drive the internal combustion engine. The control system includes an electronic control unit configured to, when operation of the internal combustion engine is stopped, stop fuel injection in the internal combustion engine and then, execute motoring in which the internal combustion engine is rotationally driven using drive power of the motor, and execute the motoring in a range in which an oxygen occlusion amount of the first exhaust catalyst becomes an oxygen occlusion amount smaller than an upper limit oxygen occlusion amount of the first exhaust catalyst.

In a control system for an internal combustion engine, the internal combustion engine includes a first exhaust catalyst that is a three-way catalyst disposed in an exhaust path of the internal combustion engine, a second exhaust catalyst that is a three-way catalyst disposed in the exhaust path on a downstream side of the first exhaust catalyst, and a motor configured to drive the internal combustion engine. The control system includes an electronic control unit configured to, when operation of the internal combustion engine is stopped, stop fuel injection in the internal combustion engine and then, execute motoring in which the internal combustion engine is rotationally driven using drive power of the motor, and execute the motoring in a range in which an oxygen occlusion amount of the first exhaust catalyst becomes an oxygen occlusion amount smaller than an upper limit oxygen occlusion amount of the first exhaust catalyst.

A method for automatically starting and stopping engine(s) of a vessel based on the position of a handle. Automatic starting occurs by activating an ignition circuit, receiving a signal indicating handle position, and providing a signal to start the engine when the handle is out of neutral position. A signal to shift the transmission into gear is sent when the handle is in an idle position. Automatic stopping of the engine includes receiving a signal the handle is in neutral, receiving status information of the engine, and providing a signal to stop the engine when the handle is in neutral and either the engine is not running or at least one of a number of conditions are met. A shutoff timer may delay auto stop of the engine, which may reset whenever any of the conditions ceases to be true.

A system and method monitor operation of a compressor, determine whether the operation of the compressor is outside of a designated range of values, and, responsive to determining that the operation of the compressor is outside of the designated range of values, one or more of (a) prevent communication of a signal to a system controller that controls operation of the compressor, (b) direct a gas from a reservoir to a pressure sensor used by the system controller to determine a gas pressure generated by the compressor, and/or (c) communicate the signal to the system controller that controls operation of the compressor.

A system for automatically starting and stopping engine(s) of a vessel based on the position of a handle. Movement of the handle out of neutral initiates the automatic starting of the engine(s) by an ECM. Movement of the handle into neutral initiates the automatic stopping of the engine(s), which may also require certain other prerequisite conditions. An ECM is in electrical communication with the engine(s), transmission, battery, initializer, starter, and various sensors providing information on the position of the handle and other conditions including engine speed, temperature, transmission speed, vessel speed and battery voltage. The ECM includes memory and processor(s), and is configured to receive information from the various sensors and operative components of the vessel and determine when to initiate automatic start and stop of the engine(s) based on thereon.

An acoustic damper includes a housing with an inlet aperture and an outlet aperture. The housing is configured to receive a gas flow that enters via the inlet aperture and that exits via the outlet aperture. The acoustic damper also includes a barrier member that is disposed within the housing. The barrier member is configured to be disposed within the gas flow and to dampen acoustic energy that propagates in an upstream direction generally from the outlet aperture toward the inlet aperture. The barrier member includes an outer structure that defines an interior volume of the barrier member. The interior volume is oriented toward the outlet aperture.

A hybrid vehicle HV is provided with an electric motor MT for generating vehicle drive force, an electrical generator GN for generating electric power to be supplied to the electric motor, a plurality of internal combustion engines EG1, EG2 for driving the generator, the plurality of internal combustion engines differing in output characteristics, and a controller CT configured to select one or more internal combustion engines from the plurality of internal combustion engines so that, when operating the selected one or more internal combustion engines in the respective high efficiency regions thereof, an engine output satisfies a required engine output and an engine operating efficiency is maximum, and to operate the selected one or more internal combustion engines in the respective high efficiency regions thereof.

A system for automatically starting and stopping engine(s) of a vessel based on the position of a handle. Movement of the handle out of neutral initiates the automatic starting of the engine(s) by an ECM. Movement of the handle into neutral initiates the automatic stopping of the engine(s), which may also require certain other prerequisite conditions. An ECM is in electrical communication with the engine(s), transmission, battery, initializer, starter, and various sensors providing information on the position of the handle and other conditions including engine speed, temperature, transmission speed, vessel speed and battery voltage. The ECM includes memory and processor(s), and is configured to receive information from the various sensors and operative components of the vessel and determine when to initiate automatic start and stop of the engine(s) based on thereon.