Combined shut-off valve and cover for an engine breather system

A closed circuit breather apparatus for an engine breather system comprising:

• a cylinder head cover;
• a shut oft valve provided beneath the cylinder head cover, the shut off valve including an aperture in communication with a ventilation Inlet passage and a valve float restrained to move between a first position in which the aperture is open and a second position in which the aperture Is closed;
• and
• a pressure regulation valve In communication with the ventilation inlet passage.

A closed circuit breather apparatus for an engine breather system comprising:

• a cylinder head cover adapted to define an engine valve chamber;
• and
• a shut off valve provided within the engine valve chamber, the shut off valve including an aperture in communication with a ventilation inlet passage and a valve float restrained to move between a first position in which the aperture is open and a second position in which the aperture is closed;
• wherein the shut off valve includes a guide cage that restrains the valve float for movement between the first and second positions.

A closed circuit breather apparatus for an engine breather system comprising:

• a cylinder head cover adapted to define an engine valve chamber;
• a shut off valve provided within the engine valve chamber, the shut off valve including an aperture in communication with a ventilation inlet passage and a valve float restrained to move between a first position in which the aperture is open and a second position in which the aperture is closed;
• and
• a pressure regulation valve in communication with the ventilation inlet passage.

A cylinder head cover arrangement for an internal combustion engine, comprising:

• a cylinder head cover;
• a ventilation inlet passage integral with said cylinder head cover;
• a breather shut off valve integral with said cylinder head cover and in communication with said ventilation inlet passage;
• a ventilation outlet passage integral with said cylinder head cover;
• and
• a pressure regulation valve in communication with said ventilation inlet passage and said ventilation outlet passage.