Device for controlling at least one throttle cross-section at a control opening

摘要

PCT No. PCT/DE88/00238 Sec. 371 Date Nov. 1, 1989 Sec. 102(e) Date Nov. 1, 1989 PCT Filed Apr. 20, 1988 PCT Pub. No. WO88/09435 PCT Pub. Date Dec. 1, 1988.A device for controlling a throttle cross-section of at least one control orifice in a bypass line extending around a throttle valve of an air intake pipe of an internal combustion engine, for regulating an idle speed of the internal combustion engine, and comprising a throttle member, a spring element for biasing the throttle member to an initial position thereof, and a positioning motor for moving the throttle member from its initial position against a bias force of the spring element, upon failure of the spring element and when the positioning motor is actuated, to establish a safety cross-section in the bypass line, a quantity of operating medium flowing through the safety cross-section being less than a quantity of operating medium flowing through a complete cross-section of the control orifice whereby idle operation of the internal combustion engine is insured.