摘要:
A contactless ignition system for an internal combustion engine comprises a signal generator generating an AC signal synchronously with the rotation of the engine, a resistor detecting primary current supplied to an ignition coil, a circuit detecting the rising time of the primary current until the primary current attains a predetermined level, and a circuit producing a signal proportional to the rotational speed of the engine. On the basis of the signal indicative of the rising time of the primary current supplied to the ignition coil and the signal proportional to the rotational speed of the engine, an off-time control signal for controlling the off-time of the ignition coil is generated in which the ratio between the duration of the primary current supplied to the ignition coil, being maintained at the predetermined level, and the ignition period is maintained constant. The off-time of the ignition coil is controlled only when the rotational period of the engine is shorter than a predetermined setting.
摘要:
Sensor equipment includes: a sensor device having a sensing portion; and an electric connection portion coated with an electric insulation member. The electric connection portion electrically connects an external circuit and the sensor device. The electric insulation member is a thin film disposed on the electric connection portion. In the sensor equipment, the insulation member is made of the deposition film, which is not deteriorated with time. Therefore, the insulation member does not flow out from the connection portion. Accordingly, detection sensitivity of the sensor equipment is prevented from reducing.
摘要:
A pressure sensor has a resin housing containing a pressure sensor positioned between a reference pressure chamber and a pressure to be measured. A terminal extends through the housing toward the sensor. A wire connects the terminal to the sensor. When a connector is connected to the terminal, it may compress air around the terminal. The compressed air may travel along the terminal and break the wire connected to the sensor. To prevent such breakage, a barrier wall is provided to block the compressed air from penetrating toward the wire. The reference pressure chamber is divided into a main chamber and a subchamber by the barrier wall. Since the barrier wall blocks the compressed air, the compressed air can not reach a silicon gel on the sensor and the wire in the main chamber. Therefore, the wire is protected.
摘要:
A sensor device is composed of a sensor element having a sensing portion, and a signal-outputting portion mounted on a substrate. The sensor element is also mounted on the substrate via a resilient material. The sensor element is electrically connected to the signal-outputting portion through a bonding wire. The work consisting of the sensor element, signal-outputting portion and the substrate is held in a molding die, and the work is molded with an insulating material, while keeping the sensing portion exposed outside of the insulating material. A depressed portion of the molding die, in which the sensor element is accommodated in the molding process, has substantially no clearance relative to the sensor element, and the sensor element is led to the depressed portion by resiliency of the material bonding the sensor element to the substrate. Therefore, no burs are formed on the sides of the sensor element in the molding process.
摘要:
A pressure sensor includes a sensor chip having a pressure receiving surface formed on one surface of the sensor chip, a first case having one end portion at which the sensor chip is provided, a second case attached to the one end portion of the first case to cover the sensor chip. The second case is provided with a pressure introducing passage for introducing the pressure to the sensor chip, and a wiring board is provided at the one end portion of the first case to have a surface facing toward the pressure introducing passage. In the pressure sensor, the sensor chip is electrically connected with the surface of the wiring board through bumps by a flip-chip bonding such that the pressure receiving surface faces the surface of the wiring board, and an insulating member is provided to seal a connection portion of the bumps.
摘要:
A sensor device is composed of a sensor element having a sensing portion, and a signal-outputting portion mounted on a substrate. The sensor element is also mounted on the substrate via a resilient material. The sensor element is electrically connected to the signal-outputting portion through a bonding wire. The work consisting of the sensor element, signal-outputting portion and the substrate is held in a molding die, and the work is molded with an insulating material, while keeping the sensing portion exposed outside of the insulating material. A depressed portion of the molding die, in which the sensor element is accommodated in the molding process, has substantially no clearance relative to the sensor element, and the sensor element is led to the depressed portion by resiliency of the material bonding the sensor element to the substrate. Therefore, no burs are formed on the sides of the sensor element in the molding process.
摘要:
When a compressed air is led into a reference pressure chamber along with a boundary between a resin housing and a terminal, such compressed air may cause a wire breaking. A barrier wall for blocking the compressed air from penetrating toward the wire is disposed. The reference pressure chamber is divided into a main chamber and a subchamber by the barrier wall. Since the barrier wall blocks the compressed air, the compressed air can not reach a silicon gel in the main chamber. Therefore, the wire breaking caused by the compressed air when connecting a connector therewith can be precluded.
摘要:
An off-time control circuit drives an output transistor connected in series with a primary winding of an ignition coil while controlling the off-time in each ignition period so that the ratio T.sub.i /T between the period of time T.sub.i, during which the level of primary current supplied to the primary winding of the ignition coil attains a predetermined setting, and the ignition period can be maintained constant. The output from a current detecting resistor connected to the primary winding is applied to a rising time detecting circuit which detects the rising time of the primary current from the current supply starting time to the time of attainment of the predetermined setting. The off-time control circuit controls the starting time of power supplied to the output transistor depending on the output from the rising time detecting circuit.
摘要翻译:断开时间控制电路驱动与点火线圈的初级绕组串联连接的输出晶体管,同时控制每个点火周期内的关闭时间,使得在时间段Ti之间的比率Ti / T 提供给点火线圈的初级绕组的初级电流达到预定的设定值,并且点火时间可以保持恒定。 连接到初级绕组的电流检测电阻器的输出被施加到上升时间检测电路,其检测从当前电源开始时间到达到预定设置的时间的初级电流的上升时间。 关断时间控制电路根据上升时间检测电路的输出来控制提供给输出晶体管的功率的开始时间。
摘要:
An improved apparatus for use in the turn-direction indicating system of a vehicle having directional lamps energized by a battery through a current detecting resistor, a relay and a direction selecting switch. The relay is energized to close periodically in response to periodic pulses produced by a semiconductor integrated control circuit so that the directional lamps flash periodically. A protection circuit which is connected in series with a resistor across the battery render the output transistor of the semiconductor integrated control circuit ON in response to an excessively large positive voltage so that the electric current which flows through the output transistor is limited by the inherent resistance of the relay coil connected in series with the output transistor. A diode which is connected in series with the relay coil render the output transistor ON reversely in response to an excessively large negative voltage so that the electric current is limited by the relay coil.
摘要:
An improved apparatus for use in the turn-direction indicating system of a vehicle having at least front and rear directional lamps. The directional lamps are connected in parallel with each other to be energized by a battery through a current detecting resistor, a relay and a direction selecting switch. The relay is energized to close periodically in response to periodic pulse so that the directional lamps flash periodically. Generation of the periodic pulses is controlled in response to the voltages appeared across the current detecting resistor and at the junction between the relay and the direction indicating switch. The relay is adapted to function as an alarm buzzer for informing the disconnection of both front and rear directional lamps.