Two-cycle engine
AssigneeRegie Nationale des Usiness Renault
InventorsAfif Ahmed, Bertrand Hauet
Life of this patent
Estimating the term…
Abstract
Two-cycle engine with fuel injection, of the type having at least one cylinder (3) in which a piston (5) is mounted to slide. A crankshaft is connected to this piston and housed in a housing (2), cylinder (3) further communicating with an intake circuit with pressurized combustion air (7) by at least one intake orifice (17) placed in the vicinity of the bottom dead center of the piston and with a circuit for exhaust of the combustion gases. The exhaust circuit comes out in cylinder (3) by at least two exhaust orifices: a first orifice (18) placed approximately at the level of the intake orifice (17) and a second orifice (19) placed above the first.
Claims12
A two stroke engine with fuel injection, comprising:
- at least one cylinder;
- a piston reciprocatingly sliding in said cylinder between a top dead center position and a bottom dead center position;
- an intake circuit terminating in the cylinder at an intake orifice adjacent the bottom dead center position for delivering compressed air to the cylinder;
- an exhaust circuit comprising a first exhaust orifice adjacent the bottom dead center position and a second orifice positioned closer to said top dead center position than said intake orifice and said first exhaust orifice, said exhaust circuit further comprising an exhaust line, a first exhaust duct connecting said first exhaust orifice with said exhaust line and a second exhaust duct connecting said second orifice with said exhaust line;
- and
- an oxygen sensor in said second exhaust duct.
A two stroke engine with fuel injection, comprising:
- at least one cylinder;
- a piston reciprocatably sliding in said cylinder between a top dead center position and a bottom dead center position;
- an intake circuit terminating in the cylinder at an intake orifice adjacent the bottom dead center position for delivering compressed air to the cylinder;
- an exhaust circuit comprising a first exhaust orifice adjacent the bottom dead center position and a second orifice positioned closer to said top dead center position than said intake orifice and said first exhaust orifice, said exhaust circuit further comprising an exhaust line, a first exhaust duct connecting said first exhaust orifice with said exhaust line and a second exhaust duct connecting said second exhaust orifice with said exhaust line;
- a choke device in said second exhaust line, said choke device being controlled by an actuator as a function of at least one engine parameter;
- and
- a three way catalytic converter in said second exhaust duct at a position downstream of said choke device.
Dependencies are inferred from the claim text.