Valve-arrangement for controlling gas in a piston-type internal-combustion engine

An apparatus for controlling gas exchange in a piston-type internal combustion engine having at least one cylinder defining a combustion chamber having a main fuel intake conduit and an exhaust conduit, comprising:

• a pre-combustion chamber communicated between said main intake conduit, said exhaust conduit and said combustion chamber;
• a valve arrangement including an intake valve between said main intake conduit and said pre-combustion chamber, an exhaust valve between said exhaust conduit and said pre-combustion chamber and a cylinder valve between said pre-combustion chamber and said combustion chamber, whereby said valve arrangement can be selectively operated to utilize said pre-combustion chamber for both fuel flow into said combustion chamber during an intake cycle and exhaust flow from said combustion chamber during an exhaust cycle;
• and
• a valve actuating member adapted for selectively operating said valve arrangement so as to open said intake valve and said cylinder valve and to close said exhaust valve during said intake cycle, and to close said intake valve and open said exhaust valve and said cylinder valve during said exhaust cycle.

An apparatus for controlling gas exchange in a piston-type internal combustion engine having at least one cylinder defining a combustion chamber having a main fuel intake conduit and an exhaust conduit, comprising:

• a pre-combustion chamber communicated between said main intake conduit, said exhaust conduit and said combustion chamber;
• a valve arrangement including an intake valve between said main intake conduit and said pre-combustion chamber, an exhaust valve between said exhaust conduit and said pre-combustion chamber and a cylinder valve between said pre-combustion chamber and said combustion chamber, whereby said valve arrangement can be selectively operated to utilize said pre-combustion chamber for both fuel flow into said combustion chamber during an intake cycle and exhaust flow from said combustion chamber during an exhaust cycle;
• and
• a valve actuating member adapted to close at least said cylinder valve during compression and power cycles whereby flow between said combustion chamber and said pre-combustion chamber is blocked by said cylinder valve when sail cylinder valve is in a closed position.