Ignition spark vacuum advance system

Claim 2

An ignition spark vacuum advance system for use with motor vehicle internal combustion engines comprising in combination with a carburetor having a spark advance port, an ignition distributor having an ignition spark advance mechanism operated bY a spark advance vacuum unit having a vacuum port and a source of direct current potential, a vacuum line extending between said carburetor spark advance port and said spark advance vacuum unit vacuum port, a two-way valve having an operating coil included in said vacuum line which is normally in a first condition to establish a vacuum connection between said carburetor spark advance port and said spark advance vacuum unit vacuum port and operable, upon the energization of said operating coil, to a second condition to vent said vacuum advance unit vacuum port to atmosphere, means for producing a direct current reference potential signal of a magnitude proportional to vehicle speed, means responsive to said reference potential signal for producing a control signal during vehicle acceleration until said vehicle has accelerated to a speed of a selected magnitude and during vehicle deceleration after said vehicle has decelerated to a speed less than the selected magnitude, an electrical switching device having normally open current carrying elements operable to an electrical circuit closed condition in response to an electrical signal, means for connecting said current carrying elements of said electrical switching device and said operating coil of said two-way valve in series across said source of direct current potential, means responsive to said control signal for operating said electrical switching device to the electrical circuit closed condition, and means responsive to engine temperatures less than and greater than a selected engine temperature range for diverting said control signal from said electrical switching device.

Claim 3

An ignition spark vacuum advance system for use with motor vehicle internal combustion engines comprising in combination with a carburetor having a spark advance port, an ignition distributor having an ignition spark advance mechanism operated by a spark advance vacuum unit having a vacuum port and a source of direct current potential, a vacuum line extending between said carburetor spark advance port and said spark advance vacuum unit vacuum port, a two-way valve having an operating coil included in said vacuum line which is normally in a first condition to establish a vacuum connection between said carburetor spark advance port and said spark advance vacuum unit vacuum port and operable, upon the energization of said operating coil, to a second condition to vent said vacuum advance unit vacuum port to atmosphere, means for producing a direct current reference potential signal of a magnitude proportional to vehicle speed, means responsive to said reference potential signal for producing a control signal during vehicle acceleration until said vehicle has accelerated to a speed of a selected magnitude and during vehicle deceleration after said vehicle has decelerated to a speed less than the selected magnitude, a normally not conducting transistor having a base electrode and two currents carrying electrodes, means for connecting said current carrying electrodes of said transistor and said operating coil of said two-way valve in series across said source of direct current potential, means responsive to said control signal for supplying base drive current to said base electrode of said transistor, and means responsive to engine temperatures less than and greater than a selected engine atmosphere range for diverting said base drive current from said transistor.

Claim 4

An ignition spark vacuum advance system for use with motor vehicle internal combustion engines comprising in combination with a carburetor having a spark advance port, an ignition distributor having an ignition spark advance mechanism operated by a spark advance vacuum unit having a vacuum port and a source of direct current potential, a vacuum line extending between said carburetor spark advance port and said spark advance vacuum unit vacuum port, a two-way valve having an operating coil included in said vacuum line which is normally in a first condition to establish a vacuum connection between said carburetor spark advance port and said spark advance vacuum unit vacuum port and operable, upon the energization of said operating coil, to a second condition to vent said vacuum advance unit vacuum port to atmosphere, means for producing a direct current reference potential signal of a magnitude proportional to vehicle speed, means responsive to said reference potential signal for producing a control signal during vehicle acceleration until said vehicle has accelerated to a speed of a selected magnitude and during vehicle deceleration after said vehicle has decelerated to a speed less than the selected magnitude, a normally not conducting transistor having a base electrode and two currents carrying electrodes, means for connecting said current carrying electrodes of said transistor and said operating coil of said two-way valve in series across said source of direct current potential, means responsive to said control signal for supplying base drive current to said base electrode of said transistor, and means responsive to engine temperatures less than and greater than a selected engine atmosphere range for diverting said base drive current from said transistor.

Claim 5

An ignition spark vacuum advance system for use with motor vehicle internal combustion engines comprising in combination with a carburetor having a spark advance port, an ignition distributor having an ignition spark advance mechanism operated by a spark advance vacuum unit having a vacuum port and a source of direct current potential, a vacuum line extending between said carburetor spark advance port and said spark advance vacuum unit vacuum port, a two-way valve having an operating coil included in said vAcuum line which is normally in a first condition to establish a vacuum connection between said carburetor spark advance port and said spark advance vacuum unit vacuum port and operable, upon the energization of said operating coil, to a second condition to vent said vacuum advance unit vacuum port to atmosphere, means for producing a direct current reference potential signal of a magnitude proportional to vehicle speed, means responsive to said reference potential signal for producing a control signal during vehicle acceleration until said vehicle has accelerated to a speed of a selected magnitude and during vehicle deceleration after said vehicle has decelerated to a speed less than the selected magnitude, a normally not conducting transistor having a base electrode and two currents carrying electrodes, means for connecting said current carrying electrodes of said transistor and said operating coil of said two-way valve in series across said source of direct current potential, means responsive to said control signal for supplying base drive current to said base electrode of said transistor, a temperature sensitive switch having current carrying elements operable to an electrical circuit closed condition in response to engine temperatures less than and greater than a selected engine temperature range, and means for connecting said current carrying elements of said temperature sensitive switch across said base electrode of said transistor and a point of reference potential for diverting said base drive current from said base electrode of said transistor.

Claim 6

An ignition spark vacuum advance system for use with motor vehicle internal combustion engines comprising in combination with a carburetor having a spark advance port, an ignition distributor having an ignition spark advance mechanism operated by a spark advance vacuum unit having a vacuum port and a source of direct current potential, a vacuum line extending between said carburetor spark advance port and said spark advance vacuum unit vacuum port, a two-way valve having an operating coil included in said vAcuum line which is normally in a first condition to establish a vacuum connection between said carburetor spark advance port and said spark advance vacuum unit vacuum port and operable, upon the energization of said operating coil, to a second condition to vent said vacuum advance unit vacuum port to atmosphere, means for producing a direct current reference potential signal of a magnitude proportional to vehicle speed, means responsive to said reference potential signal for producing a control signal during vehicle acceleration until said vehicle has accelerated to a speed of a selected magnitude and during vehicle deceleration after said vehicle has decelerated to a speed less than the selected magnitude, a normally not conducting transistor having a base electrode and two currents carrying electrodes, means for connecting said current carrying electrodes of said transistor and said operating coil of said two-way valve in series across said source of direct current potential, means responsive to said control signal for supplying base drive current to said base electrode of said transistor, a temperature sensitive switch having current carrying elements operable to an electrical circuit closed condition in response to engine temperatures less than and greater than a selected engine temperature range, and means for connecting said current carrying elements of said temperature sensitive switch across said base electrode of said transistor and a point of reference potential for diverting said base drive current from said base electrode of said transistor.

Claim 7

An ignition spark vacuum advance system for use with motor vehicle internal combustion engines comprising in combination with a carburetor having a spark advance port, an ignition distributor having an ignition spark advance mechanism operated by a spark advance vacuum unit having a vacuum port and a source of direct current potential, a vacuum line extending between said carburetor spark advance port and said spark advance vacuum unit vacuum port, a two-way valve having an operating coil included in said vacuum line which is normally in a first condition to establish a vacuum connection between said carburetor spark advance port and said spark advance vacuum unit vacuum port and operable, upon the energization of said operating coil, to a second condition to vent said vacuum advance unit vacuum port to atmosphere, means for producing a direct current reference potential signal of a magnitude proportional to vehicle speed, a trigger circuit responsive to said reference potential signal for producing a control signal during vehicle acceleration until said vehicle has accelerated to a speed of a selected magnitude and during vehicle deceleration after said vehicle has decelerated to a speed less than the selected magnitude, a normally not conducting switching transistor having a base electrode and two currents carrying electrodes, means for connecting said current carrying electrodes of said transistor and said operating coil of said two-way valve in series across said source of direct current potential, a driver transistor having two current carrying electrodes connected across a selected polarity terminal of said source of direct current potential and said base electrode of said switching transistor responsive to said control signal for completing a circuit through which base drive current is supplied to said base electrode of said switching transistor, and means responsive to engine temperatures less than and greater than a selected engine temperature range for diverting said base drive current from said switching transistor.

Claim 8

An ignition spark vacuum advance system for use with motor vehicle internal combustion engines comprising in combination with a carburetor having a spark advance port, an ignition distributor having an ignition spark advance mechanism operated by a spark advance vacuum unit having a vacuum port and a source of direct current potential, a vacuum line extending between said carburetor spark advance port and said spark advance vacuum unit vacuum port, a two-way valve having an operating coil included in said vacuum line which is normally in a first condition to establish a vacuum connection between said carburetor spark advance port and said spark advance vacuum unit vacuum port and operable, upon the energization of said operating coil, to a second condition to vent said vacuum advance unit vacuum port to atmosphere, means for producing a direct current reference potential signal of a magnitude proportional to vehicle speed, a trigger circuit responsive to said reference potential signal for producing a control signal during vehicle acceleration until said vehicle has accelerated to a speed of a selected magnitude and during vehicle deceleration after said vehicle has decelerated to a speed less than the selected magnitude, a normally not conducting switching transistor having a base electrode and two currents carrying electrodes, means for connecting said current carrying electrodes of said transistor and said operating coil of said two-way valve in series across said source of direct current potential, a driver transistor having two current carrying electrodes connected across a selected polarity terminal of said source of direct current potential and said base electrode of said switching transistor responsive to said control signal for completing a circuit through which base drive current is supplied to said base electrode of said switching transistor, and means responsive to engine temperatures less than and greater than a selected engine temperature range for diverting said base drive current from said switching transistor.

Claim 9

An ignition spark vacuum advance system for use with motor vehicle internal combustion engines comprising in combination with a carburetor having a spark advance port, an ignition distributor having an ignition spark advance mechanism operated by a spark advance vacuum unit having a vacuum port and a source of direct currenT potential, a vacuum line extending between said carburetor spark advance port and said spark advance vacuum unit vacuum port, a two-way valve having an operating coil included in said vacuum line which is normally in a first condition to establish a vacuum connection between said carburetor advance port and said spark advance vacuum unit vacuum port and operable, upon the energization of said operating coil, to a second condition to vent said vacuum advance unit vacuum port to atmosphere, means for producing a direct current reference potential signal of a magnitude proportional to vehicle speed, a trigger circuit responsive to said reference potential signal for producing a control signal during vehicle acceleration until said vehicle has accelerated to a speed of a selected magnitude and during vehicle deceleration after said vehicle has decelerated to a speed less than the selected magnitude, a normally not conducting switching transistor having base, emitter and collector electrodes, means for connecting said collector-emitter electrodes of said switching transistor and said operating coil of said two-way valve in series across said source of direct current potential, a driver transistor having base, collector and emitter electrodes, means for applying said control signal to said base electrode of said driver transistor, means for connecting said emitter-collector electrodes of said driver transistor and said base-emitter of said switching transistor across said source of direct current potential, a temperature sensitive switch having current carrying elements operable to an electrical current closed condition in response to engine temperature less than and greater than a selected engine temperature range, and means for connecting said current carrying elements of said temperature sensitive switch across said base-emitter electrodes of said switching transistor.

Claim 10

An ignition spark vacuum advance system for use with motor vehicle internal combustion engines comprising in combination with a carburetor having a spark advance port, an ignition distributor having an ignition spark advance mechanism operated by a spark advance vacuum unit having a vacuum port and a source of direct currenT potential, a vacuum line extending between said carburetor spark advance port and said spark advance vacuum unit vacuum port, a two-way valve having an operating coil included in said vacuum line which is normally in a first condition to establish a vacuum connection between said carburetor advance port and said spark advance vacuum unit vacuum port and operable, upon the energization of said operating coil, to a second condition to vent said vacuum advance unit vacuum port to atmosphere, means for producing a direct current reference potential signal of a magnitude proportional to vehicle speed, a trigger circuit responsive to said reference potential signal for producing a control signal during vehicle acceleration until said vehicle has accelerated to a speed of a selected magnitude and during vehicle deceleration after said vehicle has decelerated to a speed less than the selected magnitude, a normally not conducting switching transistor having base, emitter and collector electrodes, means for connecting said collector-emitter electrodes of said switching transistor and said operating coil of said two-way valve in series across said source of direct current potential, a driver transistor having base, collector and emitter electrodes, means for applying said control signal to said base electrode of said driver transistor, means for connecting said emitter-collector electrodes of said driver transistor and said base-emitter of said switching transistor across said source of direct current potential, a temperature sensitive switch having current carrying elements operable to an electrical current closed condition in response to engine temperature less than and greater than a selected engine temperature range, and means for connecting said current carrying elements of said temperature sensitive switch across said base-emitter electrodes of said switching transistor.