Fuel feed unit and two-stroke engine having a fuel feed unit

A fuel feed unit for feeding fuel to a two-stroke engine, the fuel feed unit comprising:

• a base body having an intake channel section formed therein;
• at least one fuel opening which opens into said intake channel section;
• a throttle flap configured to control a free flow cross section of said intake channel section;
• said throttle flap being mounted pivotably about a pivot axis;
• a partition wall section extending in said intake channel section at least upstream of said throttle flap;
• said partition wall section dividing said intake channel section into a mixture channel into which said fuel opening is configured to feed fuel and an air channel;
• said partition wall section having a recess;
• said throttle flap having an end position in which said throttle flap at least partially lies in said recess;
• said partition wall section having, upstream of said recess, a continuous mixture channel surface which faces said mixture channel and which has lateral sections adjacent to said intake channel wall and a middle section running between said lateral sections;
• said lateral sections having, upstream of the throttle flap, a separation edge for the flow in said mixture channel and, in the end position of said throttle flap, a side of said throttle flap which faces the mixture channel defining a reference plane which divides the fuel feed unit into a first region, in which said throttle flap is arranged, and a second region;
• and,
• said middle section, at least directly upstream of said recess, lying in said first region and said lateral sections lying in said reference plane or in said second region.

A two-stroke engine comprising:

• a fuel feed unit for feeding fuel to the two-stroke engine, the fuel feed unit including a base body, a throttle flap, and a partition wall section;
• said base body having an intake channel section formed therein;
• said fuel feed unit further having at least one fuel opening which opens into said intake channel section;
• said throttle flap configured to control a free flow cross section of said intake channel section;
• said throttle flap being mounted pivotably about a pivot axis;
• said partition wall section extending in said intake channel section at least upstream of said throttle flap;
• said partition wall section dividing said intake channel section into a mixture channel into which said fuel opening is configured to feed fuel and an air channel;
• said partition wall section having a recess;
• said throttle flap having an end position in which said throttle flap at least partially lies in said recess;
• said partition wall section having, upstream of said recess, a continuous mixture channel surface which faces said mixture channel and which has lateral sections adjacent to said intake channel wall and a middle section running between said lateral sections;
• said lateral sections having, upstream of the throttle flap, a separation edge for the flow in said mixture channel and, in the end position of said throttle flap, a side of said throttle flap which faces the mixture channel defining a reference plane which divides the fuel feed unit into a first region, in which said throttle flap is arranged, and a second region;
• and,
• said lateral sections extending, at least directly upstream of said recess, into said second region of the fuel feed unit.

A two-stroke engine comprising:

• a fuel feed unit for feeding fuel to a two-stroke engine, the fuel feed unit including a base body, a throttle flap, and a partition wall section;
• said base body having an intake channel section formed therein;
• said fuel feed unit further having at least one fuel opening which opens into said intake channel section;
• said throttle flap configured to control a free flow cross section of said intake channel section;
• said throttle flap being mounted pivotably about a pivot axis;
• said partition wall section extending in said intake channel section at least upstream of said throttle flap;
• said partition wall section dividing said intake channel section into a mixture channel into which said fuel opening is configured to feed fuel and an air channel;
• said partition wall section having a recess;
• said throttle flap having an end position in which said throttle flap at least partially lies in said recess;
• said partition wall section having, upstream of said recess, a continuous mixture channel surface which faces said mixture channel and which has lateral sections adjacent to said intake channel wall and a middle section running between said lateral sections;
• said lateral sections having, upstream of the throttle flap, a separation edge for the flow in said mixture channel and, in the end position of said throttle flap, a side of said throttle flap which faces the mixture channel defining a reference plane which divides the fuel feed unit into a first region, in which said throttle flap is arranged, and a second region;
• and,
• said middle section, at least directly upstream of said recess, lying in said first region and said lateral sections lying in said reference plane or in said second region.