Intake control apparatus

1. An intake control apparatus for use as a component of an internal combustion engine, and which is configured to control an intake air quantity of intake air routed into the internal combustion engine when installed thereon, the intake control apparatus comprising:

a plurality of intake pipes through which intake air for the internal combustion engine passes;

a valve body which is disposed in each of the intake pipes and which is operable to adjust the intake air quantity of air passing through the intake pipes;

a connection portion which connects at least a pair of adjacent intake pipes of the plurality of intake pipes to each other; and

a throttle body which integrally includes the plurality of intake pipes and the connection portion,

wherein the throttle body includes a first linear bypass passage which is disposed on a first side of the connection portion and passes inside of the connection portion, one end of the first linear bypass passage open to an inner wall surface, upstream of the valve body, of a first intake pipe of the pair of intake pipes, and the other end of which opens to an inner wall surface, downstream of the valve body, of a second intake pipe of the pair of intake pipes,

and wherein the throttle body includes a second linear bypass passage which is disposed on a second side of the connection portion and passes inside of the connection portion, one end of the second linear bypass passage open to an inner wall surface, upstream of the valve body, of the second intake pipe, and the other end of the second linear bypass passage opens to an inner wall surface, downstream of the valve body, of the first intake pipe.

2. The intake control apparatus according to claim 1 , further comprising

a linear branch passage, one end of which opens to an inner wall surface of the bypass passage and the other end of which opens to an inner wall surface downstream of the valve body of the one intake pipe.

3. The intake control apparatus according to claim 1 , wherein the connection portion has at least one reinforcing rib thereon.

4. The intake control apparatus according to claim 1 , wherein each of the intake pipes has an inlet, an outlet, and a longitudinal axis, wherein the inlets of the intake pipes are situated adjacent to one another, and wherein the longitudinal axes of the intake pipes are oriented substantially parallel to one another.

5. An intake control apparatus for use as a component of an internal combustion engine, and which is configured to control a quantity of intake air routed into the internal combustion engine when installed thereon, the intake control apparatus comprising:

a plurality of intake pipes through which intake air for the internal combustion engine passes;

a valve body which is disposed in each of the intake pipes and adjusts the intake air quantity of the intake pipes;

a connection portion which connects at least a pair of adjacent intake pipes of the plurality of intake pipes to each other; and

a throttle body which integrally includes the plurality of intake pipes and the connection portion, wherein:

the throttle body has a linear bypass passage formed therein which passes inside of the connection portion, one end of which opens to an inner wall surface upstream of the valve body of one intake pipe of the pair of intake pipes, and the other end of which opens to an inner wall surface downstream of the valve body of the other intake pipe,

the throttle body further has a linear branch passage formed therein, one end of which opens to an inner wall surface of the bypass passage and the other end of which opens to an inner wall surface downstream of the valve body of the one intake pipe,

and a cross-sectional area of a passage of the one intake pipe, on a plane passing through a point spaced by an arbitrary distance to an upstream side in an extending direction of the one intake pipe from the valve body of the one intake pipe, the plane being orthogonal to the extending direction, is greater than a cross-sectional area of a passage of the other intake pipe, on a plane passing through a point spaced by a same distance as the arbitrary distance to an upstream side in an extending direction of the other intake pipe from the valve body of the other intake pipe, the plane being orthogonal to the extending direction of the other intake pipe, on condition that the arbitrary distance is greater than a distance between an opening portion of the bypass passage of the one intake pipe and the valve body of the one intake pipe.

6. An intake control apparatus for use as a component of an internal combustion engine, and which is configured to control a quantity of intake air routed into the internal combustion engine when installed thereon, the intake control apparatus comprising:

a plurality of intake pipes through which intake air for the internal combustion engine passes;

a valve body which is disposed in each of the intake pipes and adjusts the intake air quantity of the intake pipes;

a connection portion which connects at least a pair of adjacent intake pipes of the plurality of intake pipes to each other; and

a throttle body which integrally includes the plurality of intake pipes and the connection portion, wherein:

the throttle body has a linear bypass passage formed therein which passes inside of the connection portion, one end of which opens to an inner wall surface upstream of the valve body of one intake pipe of the pair of intake pipes, and the other end of which opens to an inner wall surface downstream of the valve body of the other intake pipe,

the connection portion includes a plate-like connection base which extends in a direction from one of the pair of intake pipes to the other and in a direction where both of the intake pipes extend, and which connects the both intake pipes, and

the connection portion includes a projecting portion formed such that a part in a peripheral direction of a peripheral wall of the bypass passage projects in a thickness direction of the connection base.