Throttle valve

Abstract

Provided a throttle body for improving the assembling accuracy of a throttle member while applying to a plurality of types having different requirements for the amount of intake air. The throttle body 1 comprises a body part 3 forming an intake passage 4, and a throttle valve 20 for opening / closing the intake passage 4. In the body part 3, selective one of a plurality of types of throttle members 50 is incorporated for restricting the amount of intake air flowing in the intake passage 4, as predetermined. The throttle member 50 is pressed and incorporated in the body 3. A fitting recessed portion 45 of the body part 3 into which the throttle member 50 is pressed is set at a high-rigidity site of the body part 3. The throttle member 50 has a ring-shaped funnel portion 56 whose bore is gradually smaller as tending from the intake upstream side to the downstream side.

Description

technical field [0001] The invention relates to a throttle valve body. Background technique [0002] A typical throttle body has a valve body body forming an intake passage, and a throttle valve that opens and closes the intake passage (see JP 2000-45799 ). [0003] In addition, there is a structure (refer to Japanese Patent Application Laid-Open No. 9-268953): a throttle member for limiting the amount of air intake to the throttle body is provided in the air cleaner outlet hose, and when the air cleaner outlet hose is When connected to the throttle body, a part of the throttle member overlaps with the throttle body. In addition, the throttle member restricts the intake air amount of the throttle body to a predetermined amount when the throttle valve is fully opened, thereby suppressing the engine output to a predetermined value or less. [0004] In the aforementioned Japanese Patent Laid-Open No. 2000-45799, since the intake air volume is constant when the throttle valve ...

AI Technical Summary

Problems solved by technology

[0004] In the above-mentioned Japanese Patent Laid-Open No. 2000-45799, since the intake air volume is constant when the throttle valve is fully opened, there is a problem that it cannot cope with multiple models with different air intake volume requirements.

[0005] In addition, in the above-mentioned Japanese Patent Laid-Open No. 9-268953, since the throttle member is provided in a member with low rigidity such as the air cleaner outlet hose, and the air cleaner outlet hose is connected to the throttle valve body, and the throttle Part of the member overlaps with the throttle body, so there is a problem that the mounting accuracy of the throttle member to the throttle body is low

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