Throttle body for internal combustion engine
AssigneeMitsubishi Electric Corporation
InventorsKazuhisa Kurita, Katsunari Takagi, Teruhiko Moriguchi, Hiromichi Tsugami
Life of this patent
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Abstract
An throttle body for rotating a valve shaft of an air-intake throttle valve through a decelerating mechanism by a motor and change the opening area of an air-intake passage by rotating the valve shaft is equipped with a lever portion that is disposed so as to be interlocked with the decelerating mechanism and regulates the opening degree of the air-intake throttle valve under the full-open state, and an adjusting screw that is threadably inserted from the outside of the body portion and abuts against the lever portion in the body portion to change the opening degree of the air-intake throttle valve under the full-open state.
Claims4
A method for internal combustion engines that have maximum air flow rates different from one another, and each includes a throttle body comprising an air-intake throttle valve comprising a body portion having an air-intake passage formed therein, the method comprising:
- determining, in advance, pre-specified amounts of an opening degree of throttle valves in a full-open state to correspond to the maximum air flow rates of respective internal combustion engines, so that each of the throttle valves assumes a variable position with respect to an air flow direction of the air-intake passage based on the pre-specified amounts of the opening degree that are determined in advance to correspond to the maximum air flow rates of each of the internal combustion engines;
- inserting an adjusting screw from an outside of the body portion of a corresponding throttle valve to abut against a lever portion in the body portion;
- adjusting, with the screw, the opening degree of the corresponding throttle valve in the full-open state to the pre-specified amount of the opening degree, determined in advance for the respective internal combustion engine which is to accommodate a corresponding throttle body comprising the corresponding throttle valve;
- and
- interlocking the lever portion with a decelerating mechanism which rotates a valve shaft attached to the corresponding throttle valve by a motor and varies an opening area of the air-intake passage.
Dependencies are inferred from the claim text.