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US 11,603,812 B1Granted
Variable valve device of vehicle air intake system
AssigneesHyundai Motor Company, Kia Corporation
InventorsHae Jun Jeong, Je Yeon Kim, Yoon Geun Cho, Seung Hyun Lee
Life of this patent
Estimating the term…
Abstract
An embodiment variable valve device of a vehicle intake system includes a variable valve housing fixed to a housing of an air cleaner and including a valve passage penetrating the air cleaner, a variable valve flap rotatably coupled to the variable valve housing and configured to perform opening and closing operations based on an intake negative pressure of an engine to open and close the valve passage, and a cam protrusion and a leaf spring provided on the variable valve flap and the variable valve housing, respectively, wherein the cam protrusion and the leaf spring are in contact with each other.
Claims20
A variable valve device of a vehicle intake system, the device comprising:
- a variable valve housing fixed to a housing of an air cleaner and comprising a valve passage penetrating the air cleaner;
- a variable valve flap rotatably coupled to the variable valve housing and configured to perform opening and closing operations based on an intake negative pressure of an engine to open and close the valve passage, wherein the variable valve flap is configured to perform the opening operation to open the valve passage when the variable valve flap is rotated upward within the air cleaner under the intake negative pressure of the engine and configured to perform the closing operation to close the valve passage when the variable valve flap is rotated downward by a weight thereof;
- and a cam protrusion and a leaf spring provided on the variable valve flap and the variable valve housing, respectively, wherein the cam protrusion and the leaf spring are in contact with each other, wherein the cam protrusion protrudes from a valve shaft provided on a top end of the variable valve flap toward the variable valve housing, and wherein the leaf spring is provided on the top end of the variable valve housing, wherein a protruding portion of the leaf spring is in contact with the cam protrusion.
A variable valve device of a vehicle intake system, the device comprising:
- a variable valve housing fixed to a housing of an air cleaner and comprising a valve passage penetrating the air cleaner;
- a variable valve flap rotatably coupled to the variable valve housing and configured to perform opening and closing operations based on an intake negative pressure of an engine to open and close the valve passage;
- a cam protrusion and a leaf spring provided on the variable valve flap and the variable valve housing, respectively, wherein the cam protrusion and the leaf spring are in contact with each other;
- and
- a spring recess provided inside a top end of the variable valve housing, wherein the spring recess is configured to accommodate the leaf spring, a bottom end of the spring recess and the valve passage are connected to each other through a bottom inlet, wherein a portion of the spring recess facing the cam protrusion has an open hole extending through the variable valve housing, and wherein a portion of the leaf spring protrudes through the open hole to be in contact with the cam protrusion.
2 more elements
A vehicle intake system comprising:
- an air cleaner comprising a housing, wherein the air cleaner is configured to remove impurities from air drawn in through an air duct and to reduce intake noise;
- an air hose configured to pass the air purified by the air cleaner to a combustion chamber of an engine;
- a variable valve housing fixed to the housing of the air cleaner and comprising a valve passage penetrating the air cleaner;
- a variable valve flap rotatably coupled to the variable valve housing and configured to perform opening and closing operations based on an intake negative pressure of the engine to open and close the valve passage;
- a cam protrusion and a leaf spring provided on the variable valve flap and the variable valve housing, respectively, wherein the cam protrusion and the leaf spring are in contact with each other;
- and a spring recess provided inside a top end of the variable valve housing, wherein the spring recess is configured to accommodate the leaf spring, a bottom end of the spring recess and the valve passage are connected to each other through a bottom inlet, wherein a portion of the spring recess facing the cam protrusion has an open hole extending through the variable valve housing, and wherein a portion of the leaf spring protrudes through the open hole to be in contact with the cam protrusion;
- wherein the leaf spring comprises valley portions formed on both ends of the leaf spring and a ridge portion formed on a middle portion of the leaf spring;
- wherein the valley portions are supported on a first surface of the spring recess;
- wherein the ridge portion protrudes through the open hole to be in contact with the cam protrusion;
- and wherein, in a closed state of the variable valve flap, the cam protrusion is in contact with a top slope surface of the ridge portion of the leaf spring, and the variable valve flap remains in the closed state in which the valve passage is closed due to an elasticity of the leaf spring acting on the cam protrusion.
7 more elements
Dependencies are inferred from the claim text.