| 摘要 |
PURPOSE:To dispense with a conventional shutter valve in an engine supercharger provided with two pairs turbo chargers by making control of throttle valves disposed respectively on a primary and a secondary intake passage different in an operating region where only the supercharger on the primary side is driven in an operating region where both supercharger are driven. CONSTITUTION:In a rotary engine provided with primary and secondary turbochargers 4, 6 throttle valves 16a, 16b are disposed on the way of two intake passages 9a, 9b bisected downstream of an air cleaner of an intake passage 9, respectively, and are connected to an electrically-driven actuator 60 via link rods LRa, LRb, respectively. An ECU 46 determines whether or not present operating condition is in a region to drive the supercharger 4, 6. If the result affirmative, the electrically driven actuator 60 is lockingly operated so that the link positions LRa, LRb are connected to each other, for mutual connection of the throttle valves 16a, 16b. Thereafter, each degree of the throttle valves 16a 16b is controlled in a connected state. Meanwhile, if the result is negative, the connected state is released, and the operating degree of only the throttle valve 16a is controlled. |
