| Patent Number |
Title Of Patent |
Date Issued |
| D313947 |
Combined engine analyzer and cart |
January 22, 1991 |
|
| D313764 |
Diagnostic analyzer |
January 15, 1991 |
|
| D310789 |
Engine analyzer |
September 25, 1990 |
|
| D310494 |
Computer analyzer |
September 11, 1990 |
|
| D275185 |
Exhaust analyzer |
August 21, 1984 |
|
| D268174 |
Electronic engine analyzer |
March 8, 1983 |
|
| D257331 |
Engine exhaust emission analyzer |
October 14, 1980 |
|
| D257013 |
Engine exhaust emission analyzer |
September 23, 1980 |
|
| D249938 |
Tachometer |
October 17, 1978 |
|
| D249876 |
Inductive clamp |
October 10, 1978 |
|
| D248630 |
Timing light |
July 25, 1978 |
|
| D246972 |
Remote starter switch |
January 17, 1978 |
|
| 5218302 |
Interface for coupling an analyzer to a distributorless ignition system |
June 8, 1993 |
| An interface for coupling an engine analyzer to an engine having a distributorless ignition system includes a pair of pickup clamps for coupling signals from respective groups of spark plug wires. A logic cell array is supplied with spark plug secondary voltage polarity and pattern i |
| 5175501 |
Method of deriving a primary clock from secondary signals in a distributorless ignition system |
December 29, 1992 |
| An interface for coupling an engine analyzer to an engine having a distributorless ignition system includes a pair of pickup clamps for coupling signals from respective groups of spark plug wires. A logic cell array is supplied with spark plug secondary voltage polarity and pattern i |
| 5150461 |
Fixed point method of video display scaling |
September 22, 1992 |
| A method of scaling data between memories of different horizontal sizes by calculating an increment expressed as an integer and a fraction relating the horizontal memory sizes, multiplying the fraction by the dynamic range of a fraction portion counter, and successively adding the intege |
| 5068613 |
Method and apparatus for generating display waveforms im wasted spark ignition systems |
November 26, 1991 |
| A method and apparatus of developing a stabilized power firing event signal for a cylinder in a wasted spark ignition system having pairs of complementarily connected cylinders, each with a spark plug connected to an opposite end of an independent ignition coil. The first and second |
| 4907176 |
Flag generation system |
March 6, 1990 |
| An engine analyzer includes an A/D converter for sampling analog data from an engine under test and developing digital data consisting of 11 magnitude bits and a sign bit. Four flag bits are added to make a digital word of sixteen bits with the four added bits being equal to the sign bit |
| 4903220 |
Dual ported speed up memory in ROM location for engine analyzer |
February 20, 1990 |
| An IBM-compatible computer based engine analyzer includes a RAM memory in a ROM cartridge location. A data acquisition system operates substantially independently of the system microprocessor to acquire engine test signals, convert them to digital form and store them via a register in th |
| 4881183 |
Method and apparatus for emission testing |
November 14, 1989 |
| A computerized emissions tester determines concentrations of HC, CO, and CO2 in exhaust emissions. An IR test bench assembly develops an analog voltage representative of the concentration of a particular gas in a sample gas of known concentration. Data related to calibration pressure, |
| 4872004 |
Plural source arbitration system |
October 3, 1989 |
| The plural source arbitration system relates generally to communications systems for linking peripheral devices to a computer. Specifically, the arbitration system allows an external keyboard and a remote control device to be intercoupled to the keyboard slot of a computer and carry out |
| 4795979 |
Method and apparatus for determining cylinder #1 power firing event in wasted spark ignition sys |
January 3, 1989 |
| A method of determining the cylinder #1 power firing event in a wasted spark ignition system comprises developing a first signal comprising the integration of all power firing event signals, a second signal comprises the integration of all wasted firing event signals and comparing the |
| 4518268 |
Diesel engine diagnostic system |
May 21, 1985 |
| A system for analyzing a diesel engine and transmitting data regarding faults within the diesel engine. Many diesel engines include glow plugs. The electrical characteristics of glow plugs are related to temperatures within the diesel engine which, in turn, are related to the operational |
| 4480191 |
Automatic gain control for an infrared source of an automotive emissions analyzer |
October 30, 1984 |
| An automatic gain control circuit for driving a low mass infrared source used in an automotive exhaust gas emissions analyzer. A reference spectrum of radiant energy is monitored, demodulated and converted to an error signal to maintain the source at a constant energy output. |
| 4479057 |
Automatic biasing control circuit for emissions detector |
October 23, 1984 |
| A pair of operational amplifiers, one of which having a photoresistor feedback connecting the output of the amplifier to its inverting input. The non-inverting input of the last named amplifier being provided with a voltage developed by the second operational amplifier. The second am |
| 4428224 |
Apparatus and method for testing of a rotary movement-electrical signal transducer system |
January 31, 1984 |
| An apparatus and method for dynamic testing of a rotary movement-electrical signal transducer system, such as found in an automotive anti-blocking system. |
| 4424848 |
Positioning pin assembly for a tire changing machine |
January 10, 1984 |
| An improved positioning pin assembly for a tire changing machine is disclosed, including a positioning pin operable in an adjustable latched state and an extended, adjustable biased state. |
| 4423761 |
Lower bead loosener stroke adjustment |
January 3, 1984 |
| An improved means for adjustably securing a bead-loosening shoe to its drive cylinder is disclosed. The securing means includes a channel shaped tube, secured to the cylinder, and a mating connector, secured to the shoe. A pair of locking apertures in the connector are selectively aligne |
| 4423379 |
Battery testing techniques |
December 27, 1983 |
| A system and method for testing a battery having an internal impedance by generating digital battery parameter values corresponding to the battery parameters at different points in time by means of current, voltage and temperature measurement circuits and an analog-to-digital converter. |
| 4418566 |
Gas analyzing techniques |
December 6, 1983 |
| Gas analyzing techniques for monitoring the amount of oxygen in the exhaust of motor vehicles. An oxygen sensor produces a sensor signal having a sensor value proportional to the partial pressure of the oxygen produced by the motor vehicle. Processing circuitry generates a resulting sign |
| 4412444 |
Method for detection of hydrocarbonaceous fuel in a fuel injection engine |
November 1, 1983 |
| A method and apparatus for detecting the presence and quantity of fuel in a fuel/air mixture to the cylinders of a fuel injection engine is disclosed. A portion of the fuel/air mixture injected to the engine is diverted through a solid state sensor which, when included in a detection cir |
| 4395680 |
Automobile timing light |
July 26, 1983 |
| An automobile timing light for use with an internal combustion engine. The timing light includes a skip circuitry for regulating the time between flashes of a flash circuitry for permitting a sufficient charge to develop across a flash powering capacitor between successive flashes. The t |
| 4393694 |
Vehicle steering and front-end alignment defect detector |
July 19, 1983 |
| An apparatus and corresponding method for detecting steering or front-end alignment defects in a vehicle, such as an automobile, having a steering wheel steerably connected to dirigible front wheels. Each side of the vehicle being tested is restrained from sideward motion by a retaining |
| 4348732 |
Method and apparatus for engine exhaust analyzer |
September 7, 1982 |
| A processing unit for normalizing the output data of a gas analyzer in view of zero adjustment data and gain adjustment data formulated by the processing unit controlling air input and span reference simulation of a reference gas. A voltage reference generator is manually variable for |
| 4337515 |
Automotive engine analyzer for indicating a no-connection condition of engine test leads |
June 29, 1982 |
| A voltage divider network comprising three series connected resistors serve to reference a test signal lead connectable to an internal combustion engine, with respect to ground for providing a voltage test signal on an output conductor representative of test data to be retrieved from the |
| 4333337 |
Method for determining the gasoline mileage for a vehicle |
June 8, 1982 |
| An improved method for determining the gasoline mileage of a vehicle is disclosed, wherein various test horsepower values, related to the vehicle and the specific test speeds, are determined and the vehicle is operated so as to deliver a horsepower substantially equal to the determined |
| 4328546 |
Apparatus for evaluating the performance of an internal combustion engine using exhaust gas emis |
May 4, 1982 |
| An improved automated engine diagnosing device employing a digital data processor and a cathode ray tube monitor for displaying individual engine cylinder numbers in separate association with correlated values of exhaust gas emissions pollutants. Engine timing data associated with the ti |
| 4320506 |
Apparatus and method for simulation testing of an anti-block system |
March 16, 1982 |
| An apparatus and method for simulation testing of an anti-block system, as utilized in automobiles. |
| 4312043 |
Apparatus and method for determining the integrity of a distributor for an engine |
January 19, 1982 |
| An apparatus and method for detecting a defective distributor is shown. The apparatus includes an input system providing the time of each cylinder firing after an initial firing of cylinder #1. A processor then determines the deviation between the actual time of firing and an optimum tim |
| 4309900 |
Apparatus for measurement and display of relative compression by cylinder |
January 12, 1982 |
| An engine tester for determining relative compression by cylinder is disclosed. The tester includes a processor which samples starter current in response to input signals based upon engine cylinder firings. The processor correlates the starter current data and the input signals to id |
| 4285233 |
System for hot testing engines |
August 25, 1981 |
| A preferred embodiment of the system for hot testing automobile engines includes a hot test station and an indexing mechanism, or conveyor, for advancing engines to the hot test station. The engines are operated during advancement such that normalization is achieved prior to reaching the |
| 4270174 |
Remote site engine test techniques |
May 26, 1981 |
| Digital condition data corresponding to a plurality of engine operating conditions of an internal combustion engine are generated and stored in a memory system for visual display to an operator mechanic. Particular data from the memory are converted from a parallel digital format to a se |
| 4270080 |
Automatic battery charge apparatus and method |
May 26, 1981 |
| An automatic apparatus and method for charging a storage battery from a source of electrical current. The charger includes a current control circuit for conducting regulated charging current through the battery in steps. A voltage monitoring circuit determines when the steps occur by |
| 4266189 |
Current measuring apparatus and method |
May 5, 1981 |
| The disclosure describes an improved apparatus for measuring the flow of current through a conductor by means of a Hall generator. The Hall generator is biased by a constant current source employing feedback. In order to increase the accuracy of the current measurement, operational a |
| 4249171 |
Vector display scope |
February 3, 1981 |
| A cathode-ray oscilloscope controlled by a circuitry receiving four (4) voltage inputs representative of the Cartesian coordinates of endpoints of two (2) vectors, for visually displaying the vectors in the form of a dashed line segment and a solid line segment. The circuity responds to |
| 4249130 |
Dwell measuring apparatus |
February 3, 1981 |
| A circuit for measuring the dwell angle of an engine ignition system having contact points which close to conduct current through a coil, i.e., dwell, and which open to generate an ignition signal. The primary ignition signal is monitored and shaped to form an output voltage level for co |
| 4181016 |
Process and apparatus for testing hydraulic control systems |
January 1, 1980 |
| A method and apparatus for simultaneous testing of one or more hydraulic control systems, each system having a hydraulic pressure pump whose high-pressure end is connected to a first tank in which a first piston element having a relatively small surface is movable and whose low-press |
| 4179649 |
Voltage supply apparatus powered from a vehicular electrical system |
December 18, 1979 |
| A series regulating transistor supplying voltage to a supply bus from a vehicular battery in which circuitry samples voltage from the supply bus for generating a correction signal for controlling operation of the regulating transistor. A first switching transistor of a starting circuit |
| 4174627 |
Test stand for an internal combustion engine testing system |
November 20, 1979 |
| A test stand for an internal combustion engine testing system is disclosed. The test stand permits the engine to substantially freely vibrate such that engine imbalance can be measured. The test stand includes a cradle and a support assembly, having a housing and an inflatable bladder me |
| 4170140 |
Amplitude detection circuit |
October 9, 1979 |
| An amplitude detection circuit utilizing a pair of polarity reversing amplifiers is disclosed. |
| 4145746 |
Engine tester display and printing techniques |
March 20, 1979 |
| The disclosure describes an improved apparatus and method for displaying and printing the results of an analysis of an internal combustion engine. The results simultaneously are displayed on a cathode ray tube (CRT) face and are written into a buffer memory of a printer. An operator can |
