초록 ▼

An improved throttle body includes an offset axis drum valve and shaped throat. The offset axis and shaped throat provide gradual initial opening for better throttle control and the drum valve includes a lower face matching the profile of the air path through the throttle body when rotated to a full

An improved throttle body includes an offset axis drum valve and shaped throat. The offset axis and shaped throat provide gradual initial opening for better throttle control and the drum valve includes a lower face matching the profile of the air path through the throttle body when rotated to a fully open throttle position, providing an optimal flow at full throttle. The offset axis drum further includes a slightly decreasing radius. As the drum opens, the surface of the drum retreats from the throttle body wall providing clearance for dusty environments and reducing tolerances for reduced manufacturing cost. A fuel injector pocket position provides a spray pattern aligned with an initial air flow as the throttle body opens providing better mixing at part throttle. The throttle body further creates a cavity under the drum in the closed position providing an increased volume in the intake tract which improves throttle response.

대표청구항 ▼

1. A throttle body comprising: a throttle body throat for passing a flow of air to an engine;a drum valve rotating about a drum valve axis defined by drum valve axles offset to a side of the throttle body throat and intersecting the throttle body throat and having a range of positions between a full

1. A throttle body comprising: a throttle body throat for passing a flow of air to an engine;a drum valve rotating about a drum valve axis defined by drum valve axles offset to a side of the throttle body throat and intersecting the throttle body throat and having a range of positions between a fully closed position and a fully open position;a centerline CL of the drum valve perpendicular to the drum valve axis;a face of the drum valve facing outward towards the flow of air into the throttle body throat;a leading edge of the drum valve face;a trailing edge of the drum valve face opposite to the leading edge, the face defined between the leading edge and the trailing edge;a drum valve cavity formed in the throttle body throat, the drum valve rotating open rotating the leading edge first into the drum valve cavity, the leading edge moving during opening in a same general direction as the air flow through the throttle body throat;the throttle body throat having narrowed walls on opposite sides of the drum valve centerline CL cooperating with the drum valve at initial opening of the drum valve to provide narrowed and reduced air flow through the throttle body throat at initial opening of the throttle; anda fuel injector pocket below the area of initially opening of the throttle and centered below the narrowed walls,wherein the drum valve face defines a curved generally rectangular surface having wings on opposite sides, the wings define parallel spaced apart arcs, and the throttle body throat includes opposing curved slots configured to receive the wings. 2. The throttle body of claim 1, wherein: the drum valve face defines a decreasing drum valve radius, decreasing from the leading edge of the face to the trailing edge of the face; andthe drum valve face retreating from a cavity lip of the drum valve cavity as the drum valve is rotated into the drum valve cavity, providing clearance for dusty environments and reducing tolerances for reduced manufacturing cost. 3. The throttle body of claim 1, wherein the drum valve includes a curved concave lower face matching the profile of the throat when the drum valve is rotated to a fully open throttle position for providing an optimal flow at full throttle. 4. The throttle body of claim 3, wherein the drum valve axles comprises two spaced apart axle portions offset to a side of the throttle body throat and separated by the curved concave lower face. 5. The throttle body of claim 4, wherein the drum valve axles defines an axle centerline CL2 passing through the throttle body throat. 6. The throttle body of claim 4, wherein a horizontal projection of the drum valve axles passes thorough the throttle body throat, and a center portion of the horizontal projection of the drum valve axles is completely surrounded by the throttle body throat. 7. The throttle body of claim 3, wherein: the drum valve axles comprises two spaced apart axle portions offset to a side of the throttle body throat and separated by a gap; anda horizontal projection of the drum valve axles passes thorough the throttle body throat, and a center portion of the horizontal projection of the drum valve axles is completely surrounded by the throttle body throat. 8. The throttle body of claim 3, wherein: the drum valve axles comprises two spaced apart axle portions separated by a gap; anda horizontal projection of the drum valve axles passes thorough the throttle body throat, and a center portion of the horizontal projection of the drum valve axles resides completely in the throttle body throat. 9. The throttle body of claim 1, wherein the trailing edge of the drum valve face includes a recessed center portion aligned with the narrowed walls of the throttle body throat.