Abstract: A fuel injection control system makes it possible to obtain an output of a lean combustion type engine through an easy operation, even in a throttle opening region of greater than a lean limit. A throttle valve is configured to be turnable up to an over-fully opened position, which is greater than a fully opened position that corresponds to a maximum air flow rate, where the air flow rate is not substantially varied from the maximum air flow rate. In a region where the throttle valve is operated to or above the fully opened position when under a high load, the fuel-air mixture is enriched and a high output is obtained by controlling the throttle opening through operating only a power lever.

Abstract: A fuel injection control system makes it possible to obtain an output of a lean combustion type engine through an easy operation, even in a throttle opening region of greater than a lean limit. A throttle valve is configured to be turnable up to an over-fully opened position, which is greater than a fully opened position that corresponds to a maximum air flow rate, where the air flow rate is not substantially varied from the maximum air flow rate. In a region where the throttle valve is operated to or above the fully opened position when under a high load, the fuel-air mixture is enriched and a high output is obtained by controlling the throttle opening through operating only a power lever.

Abstract: A supercharging pressure control system for an internal combustion engine with a turbocharger, for controlling supercharging pressure in dependence on operating conditions of the engine, includes a waste gate valve disposed to selectively close and open a bypass exhaust passage, an actuator for actuating the waste gate valve, a control valve for communicating the actuator with the atmosphere to substantially vary the valve opening pressure of the waste gate valve, a throttle valve opening sensor, a pressure sensor for detecting intake passage pressure downstream of the throttle valve, and an electronic control unit for controlling through feedback the intake passage pressure to reach a target value by actuating the control valve in dependence on the difference between the target value and the detected pressure value. The feedback control is carried out when the throttle valve opening exceeds a predetermined value.

Abstract: The invention relates to an intermittent stitching device for sewing machines which is composed of a mechanical stopping device for stopping the upper drive shaft of the sewing machine at a determined position and an electric circuit for controlling the operation of the stopping device, so as to enable the sewing machine to produce desired intermittent stitches, basting appropriately, in addition to the making of ordinary continuous stitches.

Abstract: The invention relates to an intermittent stitching device for sewing machines which is composed of a mechanical stopping device for stopping the upper drive shaft of the sewing machine at a determined position and an electric circuit for controlling the operation of the stopping device so as to enable the sewing machine to produce desired intermittent stitches, in addition to the making of continuous stitches.