Abstract: A DPF system for an engine generator that performing a recovery process on a filter (DPF) provided to remove particulate matter generated by combustion of fuel when an amount of the particulate matter in the DPF exceeds a predetermined value, the engine generator performing the recovery process by carrying out an automatic recovery operation to raise a temperature of exhaust gas to combust the particulate matter, the system comprising: a dummy load connected to the engine generator when necessary; and control device for allowing the engine to perform a recovery preparation operation in such a manner that, once the amount of the particulate matter exceeds the predetermined value, the recovery operation is performed when the temperature of exhaust gas reaches a reference temperature, and the dummy load is connected to the generator to raise the temperature of exhaust gas when the temperature thereof fails to reach the reference temperature.

Abstract: A DPF system for an engine generator that performing a recovery process on a filter (DPF) provided to remove particulate matter generated by combustion of fuel when an amount of the particulate matter in the DPF exceeds a predetermined value, the engine generator performing the recovery process by carrying out an automatic recovery operation to raise a temperature of exhaust gas to combust the particulate matter, the system comprising: a dummy load connected to the engine generator when necessary; and control device for allowing the engine to perform a recovery preparation operation in such a manner that, once the amount of the particulate matter exceeds the predetermined value, the recovery operation is performed when the temperature of exhaust gas reaches a reference temperature, and the dummy load is connected to the generator to raise the temperature of exhaust gas when the temperature thereof fails to reach the reference temperature.

Abstract: An automatic voltage regulator of a generator with a function for suppressing an overshoot which regulator keeps an output voltage at a predetermined voltage by controlling exciting currents of the generator with turning a switching device on and off, and comprises a voltage detection means for detecting the output voltage of the generator; a deviation calculation means for calculating a deviation for a target with respect to a detected detection voltage; an integral-value calculation means for calculating an integral value of the deviation; and a pulse signal calculation means for calculating the pulse width based on an integral coefficient, a proportional coefficient, the deviation, and its integral value, and for outputting said pulse width as a pulse signal, wherein when before voltage establishment the detection voltage is not less than the first reference voltage, the target voltage is replaced with the set voltage; and wherein the switching device inputs the pulse signal calculated by the pulse signal

Abstract: An apparatus for calculating an effective voltage is provided, which includes a voltage reducer, an analogue to digital converter, a first detector, a second detector and a calculator. The voltage reducer steps down instantaneous output voltages of a generator. The analogue to digital converter converts each analogue signal of the instantaneous output voltages into a digital signal. The first detector detects a first signal of digitized instantaneous output voltage. The second detector detects a second signal, which differs in terms of phase by 120 deg. from the first signal. The calculator calculates an effective voltage according to the first and second signals, by executing a calculation with an expression: E={2(Va2+VaVb+Vb2)/3}1/2, where E represents the effective voltage, Va the first signal of instantaneous output voltage and Vb the second signal, respectively.

Abstract: The soundproof casing is divided to an engine room (1), a muffler room (2) and a radiator room (3). The engine room (1) includes the engine E and a work machine unit (generator unit G). The muffler room (2) includes mufflers M1, M2. The radiator room includes a radiator R. An electric fan D is provided between an air intake aperture (22a) and the radiator. The radiator room and the muffler room are communicated. An air flow duct (4) to communicate the engine room and the muffler room is provided. An engine fan F is provided just opposite to an entrance of the air flow duct. An inter-cooler I is provided in the air flow duct. The soundproof type engine driven work machine including aforementioned apparatuses is offered to improve the cooling efficiency as well as reducing unfavorable noise.