A control apparatus for a hybrid vehicle controls the hybrid vehicle including an engine and an electric motor. The engine includes a supercharger, and a blow-by gas treatment device including a ventilation line and a fresh air line and causing blow-by gas to be introduced into an intake system and combusted. The electric motor transmits torque to the engine. The control apparatus includes a control unit that controls driving of each of the engine and the electric motor. The control unit causes the electric motor to be in regenerative operation without decreasing an output torque of the engine in one or both of a case where a boost pressure decreases to a predetermined threshold or below and a case where an accelerator position decreases, in a situation where an outside air temperature is lower than or equal to a predetermined temperature and where the boost pressure is positive.

A control apparatus for a hybrid vehicle controls the hybrid vehicle including an engine and an electric motor. The engine includes a supercharger, and a blow-by gas treatment device including a ventilation line and a fresh air line and causing blow-by gas to be introduced into an intake system and combusted. The electric motor transmits torque to the engine. The control apparatus includes a control unit that controls driving of each of the engine and the electric motor. The control unit causes the electric motor to be in regenerative operation without decreasing an output torque of the engine in one or both of a case where a boost pressure decreases to a predetermined threshold or below and a case where an accelerator position decreases, in a situation where an outside air temperature is lower than or equal to a predetermined temperature and where the boost pressure is positive.

A ventilation apparatus of an internal combustion engine of the invention ventilates a chain chamber by recirculating blow-by gas to an intake passage through a blow-by gas recirculation pipe and introducing air into the chain chamber through an air introduction pipe. The air introduction pipe is secured to a head cover wall portion which corresponds to a portion of a head cover wall which defines the chain chamber.

In an internal combustion engine, an oil return passage extending from a breather chamber can be formed without increasing the number of component parts and without increasing the size of the internal combustion engine. The internal combustion engine (1) comprises an engine block (30) defining a cylinder (2); a case member (19) fastened to a lower part of the engine block to define a crank chamber jointly with the engine block; a bearing member (50) fastened to the engine block in the crank chamber to rotatably support a crankshaft; a breather chamber (113) defined in the engine block; an inlet passage (112) formed in the engine block to communicate the crank chamber with the breather chamber; a connection pipe (114) communicating the breather chamber with an intake device; and an oil return passage (150) formed at least in the bearing member, and extending from a bottom part of the breather chamber to an oil return port (147) opening at an outer surface of the bearing member. The oil return port may be provided in a lower part of the bearing member.

Systems are provided for a crankcase ventilation system. In one example, a crankcase ventilation (CCV) system for an engine configured to transmit crankcase gases into a clean side air duct, the clean side air duct comprising a sensor and a crankcase ventilation spigot, wherein the crankcase ventilation spigot is configured to be disposed downstream of the sensor, the crankcase ventilation spigot having an outlet configured to direct crankcase gases emerging from the crankcase ventilation spigot away from the sensor.

An abnormality assessment device includes an on-off valve that shuts an intake path on an upstream side of a connection portion of a breather line with respect to the intake path and an abnormality assessment element that assesses abnormality of the breather line. The abnormality assessment element assesses abnormality of the breather line based on a difference between an intake flow rate that is detected by an intake flow rate sensor and a target intake flow rate in a case where the on-off valve is closed.

An abnormality assessment device includes an on-off valve that shuts an intake path on an upstream side of a connection portion of a breather line with respect to the intake path and an abnormality assessment element that assesses abnormality of the breather line. The abnormality assessment element assesses abnormality of the breather line based on a difference between an intake flow rate that is detected by an intake flow rate sensor and a target intake flow rate in a case where the on-off valve is closed.

An air intake system includes an air cleaner for housing an air filter element therein above an off road vehicle engine, and a surge tank, which buffers the filtered air, at a location beside the engine. A descending tube from the air cleaner connects into a top cover of the surge tank, and an outlet tube of the air intake system extends horizontally from the top cover of the surge tank for connection into the throttle of the engine. A vapor recovery pipe connect the crankcase of the engine, lower than the outlet tube, back up to the air cleaner upstream of the filter element. The surge tank includes a tank bottom casing removably connected to a tank upper cover, with the descending tube and the outlet tube connecting into the tank upper cover.

An air intake system includes an air cleaner for housing an air filter element therein above an off road vehicle engine, and a surge tank, which buffers the filtered air, at a location beside the engine. A descending tube from the air cleaner connects into a top cover of the surge tank, and an outlet tube of the air intake system extends horizontally from the top cover of the surge tank for connection into the throttle of the engine. A vapor recovery pipe connect the crankcase of the engine, lower than the outlet tube, back up to the air cleaner upstream of the filter element. The surge tank includes a tank bottom casing removably connected to a tank upper cover, with the descending tube and the outlet tube connecting into the tank upper cover.

A vent insert is disclosed for use with an automotive turbocharger system. The vent has a substantially cylindrical hollow tube with a first end for seating the vent and a second open end. The first end has a rim around an opening. The second end of the vent has an angled opening that faces away from the direction of the gas flow when the vent insert is operating within the turbocharger system. There are a plurality of protrusions extending outward from the outside surface of the vent to assist in keeping the vent insert in place in the turbocharger system.