Abstract: A flow-type ice manufacturing machine includes substantially vertical ice making panels and equipped with a cooling pipe secured on the back of the ice making panels for cooling circulating water that flows on the ice making surfaces. The ice manufacturing machine comprises an ice storage chamber for storing ice, the chamber having a front door, a machinery room for accommodating a condensation unit, the machinery room mounted on the upper front end of the ice storage chamber, and an ice making portion mounted behind the machinery room, so that the ice produced drops into the ice storage chamber and heaps deeply in the chamber, thereby preventing the ice from spilling from the door when it is opened or forcing the door to open unexpectedly.

Abstract: In an air-fuel ratio control system for an internal combustion engine, an output from a first air-fuel ratio sensor arranged upstream of a three-way catalyst mounted across an exhaust passage of the engine is compared with a reference value during feedback control of the air-fuel ratio. The reference value is controlled based on an output from a second air-fuel ratio sensor arranged downstream of the three-way catalyst. The reference value is changed in dependence on the engine load detected.

Abstract: A mass flowmeter outputs an output value indicative of the flow rate of a gaseous mixture containing evaporative fuel and being purged into the intake system of an internal combustion engine. A calculated value of the flow rate of the mixture is obtained based on a plurality of operating parameters of the engine. The actual flow rate of the mixture and/or the actual flow rate of the evaporative fuel are/is calculated based on the output value from the mass flowmeter and the calculated value based on the engine operating parameters. The concentration of the evaporative fuel is calculated from the calculated actual flow rates of the evaporative fuel and the mixture. The calculated actual flow rate is compared with a desired flow rate value, and a purge control valve is controlled based on results of the comparison. A basic amount of fuel supplied to the engine is corrected based on the calculated actual flow rate of the evaporative fuel.

Abstract: A catalytic converter heater control system for an internal combustion engine comprising a catalytic converter installed in the engine exhaust gas passage and having a small capacity section on its upstream side and a large capacity section on its downstream side. The system has a pair of oxygen sensors installed one on the upstream side and one on the downstream side of the catalytic converter, a heater installed on the small capacity reaction section for heating incoming exhaust gas, and an electronic control unit for operating the heater when the difference between the outputs of the oxygen sensors is smaller than a prescribed value.

Abstract: A fuel injection control system for an internal combustion engine equipped with a heater for heating an air-fuel mixture in cold engine start. In the system, the timing to cease injection is first obtained by the coolant temperature and the engine load. The value is then deferred by an amount if the heater is turned on. The amount increases as the heater on-time increases. Then an injection period is added to the timing to cease injection and another timing to commence injection is determined. Thus, the injection timing is deferred if an air-fuel mixture is heated so as to minimize the residence time of the heated fuel. This ensures that the fuel will be quickly drawn to the cylinder to be burnt completely and the composition of the gas is thus improved.

Abstract: A method for controlling the air-fuel ratio in internal combustion engines, in which a low and/or decelerating engine speed is detected according to a change speed of engine operation parameters and the degree of opening of a flow regulating valve is controlled according to such change speed when deceleration is detected.

Abstract: A method for controlling the fuel supply of an internal combustion engine determines the fuel supply amount on the basis of sampled values of a pressure level within an intake pipe of the engine when the engine is operating outside of an idling range, and determines the fuel supply amount on the basis of sampled values of rotational speed of the engine when a predetermined time period has passed after the entrance of the engine operation into the idling range, and an idling speed of the engine is stabilized. Thus, a change in the engine rotational speed upon the start of idling which has been occurred in the prior art is eliminated.

Abstract: An exhaust gas recirculation system for an internal combustion engine employs a first control valve in an exhaust gas introduction passageway, a second control valve in an air conduit connecting the engine intake passage to atmosphere, and a regulating valve responsive to differential vacuum intensities for operating vacuum-responsive actuators for the control valves. A recirculation stop valve vents to atmosphere the actuator for the second control valve in response to an engine operating condition, to stop recirculation of exhaust gas.

Abstract: A copying machine equipped with a flash type fixing apparatus includes at least two light shielding shutters adapted to prevent a light resulting from flashing of the flash type fixing apparatus from reaching a photosensitive layer through a conveying path between the photosensitive layer and the flash type fixing apparatus.