Engine idle speed control device
AssigneeHyundai Motor Company
InventorsSeon-Yang Hwang, Sung-Nam Baek
Life of this patent
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Abstract
An engine idle speed control device enhances engine cold-start performance even in engines of large displacement. The device reduces noise created by intersecting air flows after bypassing the throttle valve. The device includes first and second passages, each mounted on a throttle body for enabling air flow bypassing the throttle valve, an ISA so mounted as to control the opening of the first passage, and temperature valve unit so mounted as to control the opening of the second passage in response to engine temperature.
Claims12
An engine idle speed control device, comprising:
- a body defining a main passage containing a throttle valve and first and second passages enabling flow of air bypassing the throttle valve;
- an ISA so mounted as to control openness of the first passage;
- temperature valve means so mounted as to control openness of the second passage in response to engine temperature;
- and
- wherein the main passage is formed with outlets of the first and second passage at surface thereof with a noise-proof groove connecting the outlet of the first passage and the outlet of the second passage.
An engine idle speed control device, comprising:
- a body defining a main passage containing a throttle valve and first and second passages enabling flow of air bypassing the throttle valve;
- an ISA so mounted as to control openness of the first passage wherein the first passage has an outlet area into the main passage with a sectional reduced-size opening, thus forming an outlet having a smaller sectional area than an average sectional area of the first passage;
- and
- temperature valve means so mounted as to control openness of the second passage in response to engine temperature.
An engine idle speed control device for a throttle including a throttle body with
- a throttle valve disposed in a main air passage way, the device comprising:
- first and second air passageways defined by the throttle body, each having an inlet and outlet to the main passageway to provide airflow bypasses around the throttle valve;
- a first valve mounted in the first passage way to control air flow therethrough based on engine idle speed;
- a second valve mounted in the second passageway to control air flow therethrough based in engine temperature;
- and
- a restriction at the outlet of the first passage way configured and dimensioned to provide the outlet with a cross-sectional area less than an average cross-sectional area of the first passage way.
Dependencies are inferred from the claim text.