Automatic temperature control system analyzer

• US 3,890,836 A
• Filed: 10/15/1973
• Issued: 06/24/1975
• Est. Priority Date: 10/15/1973
• Status: Expired due to Term

• Current Assignee: James M. McKenzie, Jeffrey L. Sachs
• Original Assignee: James M. McKenzie, Jeffrey L. Sachs
• Inventors: McKenzie, James M., Sachs, Jeffrey L.
• Primary Examiner(s): Queisser, Richard C.
• Assistant Examiner(s): Shoon, Frederick
• Application Number:
  US05/406,448
• Time in Patent Office: 617 Days
• Field of Search: 73/1F,168 324/73R 339/28,29R
• US Class Current: 73/168
• CPC Class Codes: B60H 1/00978 Control systems or circuits characterised by failure of detection or safety means; Diagnostic methods
• CPC Class Codes: F24F 11/30 for purposes related to the operation of the system, e.g. for safety or monitoring
• CPC Class Codes: F24F 11/38 Failure diagnosis
• CPC Class Codes: F24F 11/49 ensuring correct operation, e.g. by trial operation or configuration checks
• CPC Class Codes: F24F 11/88 Electrical aspects, e.g. circuits
• CPC Class Codes: G01R 31/006 on road vehicles, e.g. automobiles or trucks testing of ignition installations peculiar to internal combustion engines F02P17/00
• CPC Class Codes: G01R 31/28 Testing of electronic circuits, e.g. by signal tracer EMC, EMP or similar testing of electronic circuits G01R31/002; testing for short-circuits, discontinuities, leakage or incorrect line connection G01R31/50; checking computers or computer components G06F11/00; checking static stores for correct operation G11C29/00 ; testing receivers or transmitters of transmission systems H04B17/00

Abstract

An automatic temperature control system analyzer especially suitable as an analyzer to accurately analyze the component parts of a plurality of different automatic air conditioner systems in an automobile. The analyzer is interposed into the harness system of an automobile automatic temperature control system and switches set the analyzer into a mode corresponding to the particular type of automobile. Direct voltage readings are then made across the various components of the air conditioning system, known resistances being substituted by the analyzer to simulate certain components in certain tests. Deviations from recommended readings thereby enable malfunctioning components to be spotted and thereafter replaced.

Claims

1. An analyzer for testing a plurality of automatic temperature control systems comprising in combination:

meter means for measurement of a voltage applied thereto;

harness interposition means adapted to interpose said analyzer into the electric harness system of an automobile'"'"''"'"'s automatic temperature control system at a plurality of connection points;

model selector switching means electrically coupled to the connection points of said harness interposition means for selecting an operative mode of said analyzer corresponding to the type of automatic temperature control system to be tested by providing connection to the active connection points associated with said type of system;

meter adapter means including said meter and a plurality of terminals for selectively coupling said meter means to selected terminals dependent upon the type of system to be tested;

test selector and adapter means electrically coupled to said mode selector means and meter adapter means for interconnecting selected connection points through said mode selector switching means and meter adapter means terminals for selectively modifying or channeling the signals therebetween for the performance of at least two tests on each type of system, and a rectifier having input terminals coupled to said mode selector means and output terminals coupled to said test selector and adapter means.

2. An analyzer as claimed in claim 1, wherein said mode selector switching means and said meter adapter means are coupled for time coincident manual operation.

3. An analyzer for testing systems including sensor means and control means as claimed in claim 1, wherein said test selector and adapter means includes a first switching means which couple selected connection points selected by said mode selector means to selected terminals of said test selector and adapter means to provide an impedance means connected between selected ones of said terminals for connection between Said connection points to simulate the operable conditions of at least one of said system sensor means and control means.

4. An analyzer as claimed in claim 3, wherein said impedance means is a potentiometer means.

5. An analyzer as claimed in claim 3, wherein separate potentiometer means is provided for different systems to be tested, said potentiometer means being ganged together for coordinate manual operation.

6. An analyzer as claimed in claim 1, wherein said meter means is adapted to measure resistance, said meter adapter means including an external jack, circuit means coupling said jack and said meter means for measurement of a resistance connected across said jack.

7. An analyzer as claimed in claim 1, wherein said mode selector means and said meter adapter means each includes a plurality of rotary switches mechanically coupled to a single rotor.

8. An analyzer as claimed in claim 1, including vacuum gauge means for coupling a vacuum gauge to said system for the measurement of pressure on said line time coincident with said other tests on said system.