Abstract: Provided is a fuel injection control device capable of improving detection accuracy of a singular point with respect to a characteristic of the fuel injection valve to be equal to or higher than an original time resolution of the A/D conversion, and capable of accurately detecting the singular point. A variable control part 24 variably controls a conversion timing of the A/D conversion part 221 such that the conversion timing of A/D conversion for physical quantity data related to driving of the fuel injection valve 10 is relatively changed, the A/D conversion part 221 acquires a plurality of time series data by performing A/D conversion on the physical quantity data at a conversion timing before change and at a conversion timing after change by the variable control part 24, and a detection part 223 detects a singular point with respect to the characteristic of the fuel injection valve 10 based on the plurality of time series data.

Abstract: A compressor includes: an upper half casing having upper half casing parting planes; upper half diaphragms configured to be disposed on an inner circumferential side of the upper half casing and having upper half diaphragm parting planes; and upper half position regulating parts that regulate positions of the upper half casing and the upper half diaphragms. The upper half position regulating parts are fixed to at least one of the upper half casing and one of the upper half diaphragms, and have upper half abutting members at which upper half abutting surfaces, each of which comes into contact with an upper half casing recessed surface of the upper half casing and an upper half diaphragm recessed surface of the upper half diaphragm, are formed.

Abstract: When the internal combustion engine is stopped, a pressure reduction pump performs a pressure reduction while a first open/close valve and a second open/close valve are closed. After that, a control unit determines whether a fault occurs in a second purge pipe between the second open/close valve and an intake pipe based on a measured value obtained by an obtaining portion immediately after the second open/close valve is opened.

Abstract: A system and method for operating an engine using gaseous fuel is described. In one example, engine operation is adjusted responsive to a temperature of air entering an engine and a resultant temperature of a gaseous fuel injected to the engine. The system and method may improve engine air-fuel control.