Abstract: A leaky cable is provided with a linear insulator and a metal layer formed on an outer peripheral surface of the insulator. A slot for leaking electromagnetic waves is formed through the metal layer between an inner peripheral surface and an outer peripheral surface of the metal layer, and the outer peripheral surface of the insulator is formed with unevenness that inhibits misalignment of the slot with respect to the insulator. The method of manufacturing the leaky cable includes forming an insulator composed of thermoplastic resin in a cylindrical shape, roughening an outer peripheral surface of the insulator, forming a metal layer on the outer peripheral surface of the insulator, and forming a slot through the metal layer between an inner peripheral surface and an outer peripheral surface of the metal layer. The slot is configured to leak electromagnetic waves to outside of the metal layer.

Abstract: A lower limit EIEOF of a current for controlling the EGR valve employed to prevent the EGR valve from generating chattering is set in accordance with an engine revolution speed NE which indirectly indicates an amount of exhaust pressure acting on the EGR valve as the current value of the lower limit EIEOF is influenced by the exhaust pressure as a back pressure of the EGR valve. Therefore, it is possible to set a current value eiefin for EGR control in a range which has not been conventionally covered. The EGR control can be applied to a wider driving region, thus achieving an improved driving state of a diesel engine.