A blowby gas treatment device includes a pressure control valve, a fresh air induction pipe, a first blowby gas pipe, a second blowby gas pipe, a shutoff valve, a one-way valve, and a PCV valve. A leak diagnosis includes a first-stage diagnosis to determine whether or not falling of a pressure in a crank case after closing of the shutoff valve under a non-supercharging condition is normal. A second-stage diagnosis is implemented by moving the pressure control valve from a fully opened state into a fully closed state, and determining whether an intake air quantity in each state is equal to each other. When the intake air quantity in each state is equal to each other, presence of an in-system leak is determined. When a fully closed state intake air quantity is different from a fully opened state intake air quantity, presence of an out-of-system leak is determined.

A dilution suppression device 1 consists of a container 11 that can hold lubricating oil O containing a fuel component of an engine, a lubricating oil injection section 12 that injects lubricating oil O into the container 11, an absorption section 13 that is provided inside the container 11 and can absorb lubricating oil O, an internal pressure reduction section 14 that reduces the internal pressure of the container, a heating section 15 that heats the lubricating oil O to separate the fuel component from the lubricating oil O, a gas introduction section 16 that introduces gas into the container 11, a fuel component discharge section 17 that discharges the fuel component from the container 11, and a lubricating oil discharge section 18 that discharges the lubricating oil O with the fuel component separated from the container 11.

An apparatus that improves the gas mileage of an internal combustion engine in a vehicle is disclosed that is comprised of an air inlet, a condensation chamber, and an air outlet that is connected to the vehicle's oil system through an oil filler port in the engine of the vehicle.

An outboard motor to be attached to a hull of a marine vessel that reduces an amount of oil in blow-by gas reaching a breather chamber includes an internal combustion engine including a cylinder block including at least one cylinder. The cylinder block includes two blow-by gas flow paths to guide blow-by gas from a crank chamber to a breather chamber, and the internal combustion engine is oriented such that a crankshaft extends along a direction perpendicular or substantially perpendicular to a bottom of the hull when the marine vessel is sailing.

An outboard motor to be attached to a hull of a marine vessel that reduces an amount of oil in blow-by gas reaching a breather chamber includes an internal combustion engine including a cylinder block including at least one cylinder. The cylinder block includes two blow-by gas flow paths to guide blow-by gas from a crank chamber to a breather chamber, and the internal combustion engine is oriented such that a crankshaft extends along a direction perpendicular or substantially perpendicular to a bottom of the hull when the marine vessel is sailing.

A cable holder for securing a plurality of vehicle engine cables while simulating a vehicle engine distributor comprises a shaft portion and a cap portion provided at a top of the shaft portion. The cap portion cooperates with the shaft portion to define a central passageway therethrough. At least one opening is provided proximate a bottom of the shaft portion and opening to the central passageway, and a plurality of upper apertures are provided proximate a top of the cap portion and opening to the central passageway. A hollow path is formed between the at least one lower aperture and plurality of upper apertures to channel a plurality of vehicle engine cables through the cable holder.

A cable holder for securing a plurality of vehicle engine cables while simulating a vehicle engine distributor comprises a shaft portion and a cap portion provided at a top of the shaft portion. The cap portion cooperates with the shaft portion to define a central passageway therethrough. At least one opening is provided proximate a bottom of the shaft portion and opening to the central passageway, and a plurality of upper apertures are provided proximate a top of the cap portion and opening to the central passageway. A hollow path is formed between the at least one lower aperture and plurality of upper apertures to channel a plurality of vehicle engine cables through the cable holder.

A cylinder block assembly may include a cylinder block, a cylinder body disposed in the cylinder block, with a plurality of cylinder bores formed in the cylinder body, a fluid jacket, which is formed between an inner circumferential surface of the cylinder block and an outer circumferential surface of the cylinder body, and through which coolant flows, and a block insert disposed in the water jacket and configured to guide a flow of coolant, wherein the cylinder block may include a second block coolant outlet, which is formed at a second side in a surface of an exhaust side of the cylinder block, and through which the coolant in the water jacket is discharged, and wherein the exhaust side may include a side at which combustion gas is exhausted out of the cylinder body.

An improved blow-by gas return structure minimizes the occurrence of a drawback caused by freezing at a low temperature by bringing a state where freezing minimally occurs in a blow-bay gas passage such as a pipe disposed outside an engine. The blow-by gas return structure is configured such that a blow-by gas is introduced into an intake manifold through an inner passage formed in a head cover. The blow-by gas return structure includes an outer pipe which connects a blow-by gas outlet of the head cover and a blow-by gas inlet of a main pipe of the intake manifold in a communicable manner, and a temperature elevating mechanism configured to elevate a temperature of the blow-by gas inlet. The temperature elevating mechanism is configured such that a cooling water transfer passage is formed in a portion of the blow-by gas inlet of the main pipe.

An improved blow-by gas return structure minimizes the occurrence of a drawback caused by freezing at a low temperature by bringing a state where freezing minimally occurs in a blow-bay gas passage such as a pipe disposed outside an engine. The blow-by gas return structure is configured such that a blow-by gas is introduced into an intake manifold through an inner passage formed in a head cover. The blow-by gas return structure includes an outer pipe which connects a blow-by gas outlet of the head cover and a blow-by gas inlet of a main pipe of the intake manifold in a communicable manner, and a temperature elevating mechanism configured to elevate a temperature of the blow-by gas inlet. The temperature elevating mechanism is configured such that a cooling water transfer passage is formed in a portion of the blow-by gas inlet of the main pipe.