A control system for controlling a shut-off valve of an aircraft. The shut-off valve is configured to open a bypass circuit that is initially closed. This circuit makes it possible to feed air to an aircraft engine without going via an air filter associated with an air intake. The control system comprises: a manual control member for controlling the shut-off valve, this member being actuatable manually so as to cause the bypass circuit to open; and a computer configured to compute a current value of a level of clogging TC of an air filter. The control system further comprises a comparator for comparing the current value of the level of clogging TC with a first threshold value TC1 and with a second threshold value TC2, and an alerter for generating a first sensory signal and a second sensory signal.

The presently disclosed subject matter is generally directed to a system and method of protecting vehicle engines by preventing water from entering the belt drive and/or air intake of the vehicle motor. The disclosed system includes a housing and one or more snorkels that extend in an upward direction from the housing. Each snorkel includes a water sensor that detects the level of water outside of the vehicle. When water reaches the snorkel maximum depth and triggers the sensor, valve within the housing closes to divert water away from the motor. Once the vehicle is back on dry land, the user can reset the valve to the open position.

A cooling device includes a surrounding member, an air inlet, an air outlet, and a flow-path-formation mechanism. The surrounding member is configured to surround an engine. The air inlet is formed in the surrounding member. The air outlet is formed in the surrounding member and is to be coupled to an intake pipe of the engine. The flow-path-formation mechanism is configured to form a flow path that allows outside air to circulate to the air outlet from the air inlet when a temperature of the engine or a temperature inside the surrounding member is greater than or equal to a predetermined temperature.

A throttle device 1 includes a throttle valve 2, and a throttle body 6 having a through hole 4 where the throttle valve 2 is arranged, the throttle body 6 including a connection part 28 to which a flow passage forming member 26 is finable, the flow passage forming member 26 communicating with the through hole 4 and forming an intake passage 3 with the through hole 4, and the connection part 28 having a contour 50 defined by a minor axis L1 along an axis direction of a rotatable shaft 12 of the throttle valve 2 and a major axis L2 which is longer than the minor axis L1.

The present invention discloses a control method of variable stroke engine for reforming high-octane fuel under the FCE mode, the ECU connected to the engine controls the amount of fuel injected from the flexible cylinder injector to the flexible cylinder and controls the switch state of inlet valve and exhaust valve of the flexible cylinder, so that the flexible cylinder can be switched between two-stroke mode and four-stroke mode according to the actual engine operating conditions; when the engine is at a small load and needs to promote combustion stability, the flexible cylinder injector injects a rich fuel with equivalence ratio greater than 1 into the flexible cylinder, the flexible cylinder is at two-stroke mode; when the engine is at a large load and needs sufficient power output, the flexible cylinder injector injects a conventional fuel into the flexible cylinder, said flexible cylinder is at four-stroke mode.

A temperature control throttle device is provided. The temperature control throttle device includes: at least one throttle; a first pipeline and a second pipeline, wherein, the first pipeline and the second pipeline are connected to the same side of the at least one throttle in an air flow direction in parallel, and wherein the second pipeline is provided with a heat exchanger that heats air flowing through the second pipeline with engine coolant, engine oil or engine exhaust gas as a heat source.

Systems and methods for operating an engine that includes two throttles that are arranged in parallel to deliver air into a single intake manifold are described. In one example, a first throttle and a second throttle are opened according to a value of a variable that changes as a function of a requested engine air flow.

A marine engine assembly for mounting to a watercraft is disclosed. The marine engine assembly has an engine unit, an exhaust system fluidly and a propulsion device. The engine unit includes an engine unit housing, an internal combustion engine and an air intake assembly. The air intake assembly, at least one combustion chamber, and the exhaust system together defining at least in part a gas flow pathway. A sealing valve is provided in the gas flow pathway. The sealing valve has an open position permitting flow of gas therethrough. The sealing valve has a closed position preventing flow of gas therethrough for sealing a portion of the gas flow pathway downstream of the sealing valve from a portion of the gas flow pathway upstream of the sealing valve. An air pump is configured for supplying air to the gas flow pathway downstream of the sealing valve.

An HHO gas second fuel is produced in a pressure-resistant container and distributed at a low volumetric rate at multiple locations about the internal combustion engine.

An air supply device for an internal combustion engine may include at least one air chamber and at least two intake pipes, which are connected to the at least one air chamber. The intake pipes may each be designed to supply air to respective cylinders of the internal combustion engine, and they each may have intake pipe end portion assigned to a corresponding inlet opening. Via the inlet openings, air can move from an air chamber interior of the at least one air chamber into respective intake pipe interiors of the at least two intake pipes and also via the intake pipe interiors to the cylinders. The intake pipe end portions may end in the air chamber interior and overlap in at least one direction, which is oriented perpendicularly to at least one center axis of at least one of the intake pipe end portions at a common overlapping region.