Control apparatus of a throttle valve in an internal combustion engine

A control apparatus of a throttle valve in an internal combustion engine having a manually operable accelerator means, said control apparatus comprising:

• a spring means biasing said throttle valve in the direction in which said throttle valve is caused to open;
• a first operating means mechanically connected to said manually operable accelerator means and selectively engageable with said throttle valve against said spring means for restricting the opening position of said throttle valve, said first operating means comprising an accelerator link connected to said manually operable accelerator means through a cable;
• detecting means for detecting the operating condition of said engine;
• a second operating means selectively engageable with said throttle valve against said spring means independently of said first operating means and operable in accordance with a control signal obtained in response to an output from said detecting means for restricting the opening position of said throttle valve, said second operating means comprising an electric motor means having an output shaft and a motor lever secured to said output shaft;
• and,
• said throttle valve being secured to a throttle shaft having a throttle lever secured thereto, said accelerator link and said motor lever being independently engageable with said throttle lever;
• said first operating means and said second operating means being engageable with said throttle valve independently of and parallel to each other to determine a throttle opening of said throttle valve by one of said first and second operating means being engaged with said throttle valve, the other of said first and second operating means being disengaged from the throttle valve;
• said other disengaged operating means thereby defining an upper limit of a degree of opening of said throttle valve and said one engaged operating means defining the degree of opening of said throttle valve within said upper limit.