Abstract: An engine intake system including a main intake passage leading through an intake port to a combustion chamber, an auxiliary intake passage branched from the main intake passage and opened to the intake passage, and a control valve provided in the main intake passage and adapted to be opened under a heavy load engine operation and closed under a light load engine operation. A fuel injection valve is provided in the auxiliary intake passage close to the opening of the intake port to the combustion chamber to inject fuel toward the combustion chamber.

Abstract: An apparatus having a self-diagnosis mode of operation includes a memory for storing data identifying one or more other components which should be activated when a particular component is specified by the operator for testing.

Abstract: In a machine capable of self-diagnosis operation start and stop instruction signals can be applied from either the front control panel or from remote operating switches or switch receptacles, with one or the other instruction signals being selected to control a respective output terminal or machine component.

Abstract: A document conveying device having the capability of varying its recirculation path length in accordance with measured document size disables its recirculating path whenever a document exceeds a predetermined size.

Abstract: A drop jet apparatus has a nozzle head which defines a pressure chamber, a nozzle, and passages. Part of the pressure chamber is defined by a thin diaphragm which is made thick at the central and at a surrounding portion spaced from the central portion. A piezoelectric plate is adhered to the thick portions so as to bridge the thin portion between the projections.

Abstract: A pressure transducer is arranged to mount a semiconductor pressure sensor in a housing such that the pressure of a high-pressure fluid is applied to one side of the semiconductor pressure sensor through a high pressure seal diaphragm and a sealed liquid in the high pressure side, while the pressure of a low-pressure fluid is applied to the other side of the sensor through a low-pressure seal diaphragm and a sealed liquid in the low pressure side, and a protecting member is provided closer to the low-pressure seal diaphragm.