Intake manifold

An intake manifold to be mounted on a vehicle together with a horizontally opposed engine and to be disposed on an upper portion of the horizontally opposed engine, the intake manifold comprising:

• a surge tank including an air inlet;
• and
• left and right intake pipes including one end sides each connected to the surge tank, respectively extending in a width direction of the vehicle, and including the other end sides respectively connected to intake ports of the horizontally opposed engine,
• wherein
• a pressure measurement portion to measure pressure in the surge tank is provided on a part of an outer periphery portion of the surge tank that faces a front direction or a rear direction of the vehicle,
• a pressure sensor is attached to the pressure measurement portion,
• a sensing space including one end side that is opened in the surge tank and the other end side in which a pressure sensing portion of the pressure sensor is disposed is formed on the pressure measurement portion,
• a bottom surface constituting the sensing space of the pressure measurement portion is inclined downwardly toward an opening portion of the sensing space to the surge tank,
• the sensing space includes a passage containing one end side that is opened in the surge tank, and a sensor arrangement space that is connected to the other end side of the passage, in which the pressure sensing portion of the pressure sensor is disposed, and whose width is larger than a width of the passage,
• a bottom surface constituting the passage of the pressure measurement portion is inclined downwardly toward an opening portion of the passage to the surge tank, and
• a bottom surface constituting the sensor arrangement space of the pressure measurement portion is formed into a figure of V shape in a vertical section along a width direction of the sensor arrangement space and is inclined downwardly toward a connection part of the sensor arrangement space to the passage.