A sensor for a throttle control device. The throttle control device includes a throttle body. A throttle valve is disposed within an intake air channel defined within the throttle body. A speed or gear reduction mechanism is coupled between a motor and the throttle valve. A sensor detects the rotational position, i.e., the rotational angle, of the motor and has a movable section and a fixed sensing section. The movable section is attached to a rotary shaft of the motor, so that the movable secti...

A distributor for use with an electronic breakerless ignition system. The distributor has a triggering rotor and a triggering sensor which are connected by a bearing to form a single assembly so that the radial spacing between the rotor and sensor remains constant regardless of any variation in the axis of rotation of the rotor.

A pickup operatively coupled with an internal combustion engine develops a train of bi-polar pulses wherein each bi-polar pulse is generated at a predetermined engine crank angle and each bi-polar pulse comprises a leading pulse portion of one polarity and a trailing pulse portion of opposite polarity. A bi-stable circuit is switched to a set condition in response to a given magnitude of the trailing pulse portion of each bi-polar pulse and is switched to a reset condition in response to a given...

A signal source for use in a breakerless ignition system for an internal combustion engine provided outside a bowl-like flywheel of a flywheel type magneto generator, but cooperating with at least one of a plurality of permanent magnets in said magneto generator. The signal generator comprises timing pole means with one end thereof connected to a pole piece of the permanent magnet and with the other end radially extending through and exposed exterior of the cylindrical wall of the bowl-like flyw...

A method for manufacturing molded articles of polypivalolactone resin which have highly increased mechanical properties, especially in toughness, said cell comprising subjecting highly crystalline molded plastic articles of polypivalolactone resin having an intrinsic viscosity [.eta.] in the range of 1.5-4 to heat treatment under the treatment conditions consisting of temperature and duration which are both in ranges specified.

The minimal clearances between the pole teeth of the stator and rotor of the control generator in an ignition distributor for internal combustion engines are independent of eventual stray movements of the drive shaft by mounting the stator on the drive shaft so that the stator and the rotor of the control generator share all stray movements of the drive shaft but the rotor is free to rotate, without contact, relative to the stator. The stator is angularly adjustable with reference to the drive s...

A contactless ignition system for an internal combustion engine wherein the signal source comprises of a signal generator whose output signal voltage increases in proportion to an increase in the rotation speed of the engine, and the waveform of the output signal from said signal generator is changed by means of a level detector circuit such as a saturation amplifier and a Schmitt circuit for detecting signal levels, whereby any desired advance characteristics are easily attained.

A distributor for a contactless ignition apparatus of an internal combustion engine is disclosed. An ignition control circuit unit of contactless type is comprised of a case containing the ignition control IC circuit and a mold resin of the pick-up coil integrally formed with the case. The distributor contains closed magnetic circuit-forming means comprising a distributor shaft rotatable in synchronism with the engine, a reluctor or rotor fixed on the shaft and having claws in the number corresp...

In order to prevent ignition power losses at low engine speeds and further to provide for the use of ignition control signals of both unipolar and bipolar nature, the invention provides that a Schmitt trigger which generates the principal ignition control signal is actuated by the transducer. The switching thresholds of this Schmitt trigger are changeable by a secondary threshold recognition circuit which can shift at least the negative threshold of the principal threshold circuit to more positi...

The invention relates to a device for measuring the angular position of a gear in a digital ignition system of an internal combustion engine, wherein an origin sensor responsive to the passage by of a pre-set tooth of a gear, is connected to one of inputs of a pulse former having a second input to which an output of a rectifier and filter circuit is connected; and an input of the rectifier and filter circuit is coupled to the output of an angle pulse sensor.