Patent ID: 7779809

Claim:
A throttle system comprising: a throttle device for controlling intake airflow of an intake pipe connected to an internal combustion engine; and a sensor unit mounted on the throttle device, and including: a casing mounted on the throttle device; and a pressure sensor chamber located in the casing and accommodating an intake pressure sensor for detecting an intake pressure through the intake pipe, wherein the pressure sensor chamber includes: a pressure receiving area that receives a pressure in the intake pipe through a pressure sampling passage of the throttle device; a pressure detecting area that detects the pressure via the intake pressure sensor; a water reservoir portion that collects moisture generated in the pressure receiving area; and a curved partition that divides the pressure receiving area and the pressure detecting area, wherein the pressure receiving area of the sensor unit mounted on the throttle device is positioned to face an external surface of the throttle device on which the sensor unit is mounted, wherein the water reservoir portion is formed to face the external surface of the throttle device on which the sensor unit is mounted and is formed in the pressure receiving area, and wherein the pressure receiving area is arranged to communicate with the pressure detecting area through a communication portion that is positioned to face the external surface of the throttle device on which the sensor unit is mounted.