| 摘要 |
<p>PURPOSE:To obtain a stable power characteristic of an engine, by constituting a controller such that a variable throttle valve changing its opening with a current value is provided in the half way of a pressure conduction pipe communicating a compressor outlet to a pressure chamber of a diaphragm actuator and introducing pressure of the actuator is partly released to the atmosphere. CONSTITUTION:At starting of an engine 1, an electric current of a variable throttle valve 12 is set to 0 by a signal of an opening controller 14. In operation of the engine 1, an opening of a throttle valve 8 is detected by a throttle valve opening detector 9 and compared with a predetermined throttle valve opening thetaP, if a throttle valve opening theta at operation is increased larger than the opening thetaP, the electric current is conducted to flow from 0 to Imax in the valve 12 by a signal of the controller 14. Conduction pipes 12a and 12b are communicated to release outlet pressure of a compressor to the atmosphere and accelerate the engine 1, and the presence of knocking is detected by a knocking sensor 15 and decided by a comparator 16, in case of occurrence of knocking, a closing signal (current=O) is fed to the valve 12. The pipes 12a and 12b are disconnected to decrease supercharge pressure.</p> |
