Handheld tester for starting/charging systems

• US 6,570,385 B1
• Filed: 03/19/2001
• Issued: 05/27/2003
• Est. Priority Date: 03/19/2001
• Status: Expired due to Term

• Current Assignee: SPX Development Corporation
• Original Assignee: Actron Manufacturing Incorporated (SPX Corporation)
• Inventors: Namaky, Hamid, Roberts, Robert A., Koran, Matthew H.
• Primary Examiner(s): Le, N.
• Assistant Examiner(s): He, Amy
• Application Number:
  US09/813,104
• Time in Patent Office: 799 Days
• Field of Search: 324/378, 324/380, 324/381, 324/384, 324/391, 324/397, 324/399, 324/400, 324/402, 324/425-437, 324/500, 324/502, 324/503, 324/508, 324/511, 123/179.1, 320/104, 701/29, 74/6, 731/181
• US Class Current: 324/378
• CPC Class Codes: G01R 15/125 for digital multimeters
• CPC Class Codes: G01R 31/007 using microprocessors or computers
• CPC Class Codes: G01R 31/388 involving voltage measurements

Abstract

An improved hand held starting/charging system tester. According to one aspect of the present invention, the portable handheld tester includes a connector to which various test cables can be removably connected to the tester. Detection circuitry within the tester determines which of several types of test cable is connected to the tester before testing. According to another aspect of the present invention, the portable handheld tester includes an improved user interface that permits a user to review test data from previously performed tests and further permits a user to either skip a previously performed test (thereby retaining the previously collected data for that test) or re-do the test (thereby collecting new data for that test). According to yet another aspect of the present invention, the portable handheld tester that performs a more complete set of tests of the starting/charging system.

Claims

1. A hand-held, portable tester for testing a starter/charger system of an internal combustion engine, comprising:

(a) an electronic test circuit, said test circuit capable of performing at least one test on the starting/charging system;

(b) a hand-held, portable enclosure housing said electronic test circuit;

(c) a housing connector providing a first plurality of electrical connections, said housing connector being affixed to said housing and in circuit communication with said electronic test circuit, for placing said electronic test circuit in circuit communication with the starter/charger system via a test cable electrically connected to said housing connector via a removable cable connector providing a second plurality of electrical connections; and

(d) detection circuitry, said detection circuitry being in circuit communication with said electronic test circuit and at least one connection of said first plurality of connections of said housing connector, said housing connector accepting a plurality of different types of test cables, and wherein said detection circuitry is characterized by automatic identification of the type of test cable connected to said housing connector as being one of the plurality of types of test cables.

2. A hand-held, portable tester for testing a starter/charger system of an internal combustion engine according to claim 1, wherein said detection circuitry is further characterized by automatic identification of the type of test cable connected to said housing connector as being one of the plurality of types of test cables by detection of an electrical characteristic of the test cable connected to said housing connector at one or more of the plurality of electrical connections provided by said housing connector.

3. A hand-held, portable tester for testing a starter/charger system of an internal combustion engine according to claim 1, wherein said detection circuitry is further characterized by automatic identification of the type of test cable connected to said housing connector as being one of the plurality of types of test cables by detection of two or more of the first plurality of electrical connections provided by said housing connector being essentially shorted together by corresponding electrical connections provided by said cable connector.

4. A hand-held, portable tester for testing a starter/charger system of an internal combustion engine according to claim 1, wherein said detection circuitry is further characterized by automatic identification of the type of test cable connected to said housing connector as being one of the plurality of types of test cables by detection of at least one electrical resistance placed in circuit communication between two or more of the first plurality of electrical connections provided by said test cable.

5. A hand-held, portable tester for testing a starter/charger system of an internal combustion engine according to claim 1, wherein said detection circuitry is characterized by automatic alternative identification of a shorter test cable connected to said housing connector and an alternative longer test cable connected to said housing connector, and wherein said test circuit adjusts at least one parameter of said test circuit, responsive to said detection circuit detecting said longer test cable, to compensate for the additional length of said longer test cable relative to said shorter test cable.

6. A hand-held, portable tester for testing a starter/charger system of an internal combustion engine according to claim 5, wherein said test circuit further comprises a processor in circuit communication with said detection circuitry, said processor performing at least one calculation on at least one value while performing the a;

least one test on the starting/charging system, and wherein said test circuit adjusting at least one parameter of said test circuit comprises said processor adjusting the at least one value to compensate for the additional length of said longer test cable relative to said shorter test cable.

7. A hand-held, portable tester for testing a starter/charger system of an internal combustion engine according to claim 6, wherein said electronic test circuit is further characterized by performing at least one test on a starting unit of the starting/charging system, at least one test on a battery of the starting/charging system, and at least four tests on a charging unit of the starting/charging system, at least one of said tests on the charging unit of the starting/charging system being a diode ripple test.

8. A hand-held, portable tester for testing a starter/charger system of an internal combustion engine according to claim 5, wherein said longer test cable comprises an extender cable in circuit communication between a test cable and said housing connector, and wherein said test circuit adjusts at least one parameter of said test circuit, responsive to said detection circuit detecting said extender cable, to compensate for the additional length of said longer test cable relative to said shorter test cable.

9. A hand-held, portable tester for testing a starter/charger system of an internal combustion engine according to claim 8, wherein said test circuit further comprises a processor in circuit communication with said detection circuitry, said processor performing at least one calculation on at least one value while performing the at least one test on the starting/charging system, and wherein said test circuit adjusting at least one parameter of said test circuit comprises said processor adjusting the at least one value to compensate for the additional length of said longer test cable relative to said shorter test cable.

10. A hand-held, portable tester for testing a starter/charger system of an internal combustion engine according to claim 5, wherein said longer test cable comprises an extender cable in circuit communication between said shorter test cable and said housing connector, and wherein said test circuit adjusts at least one parameter of said test circuit, responsive to said detection circuit detecting said extender cable, to compensate for the additional length of said longer test cable relative to said shorter test cable.

11. A hand-held, portable tester for testing a starter/charger system of an internal combustion engine according to claim 10, wherein said test circuit further comprises a processor in circuit communication with said detection circuitry, said processor performing at least one calculation on at least one value while performing the at least one test on the starting/charging system, and wherein said test circuit adjusting at least one parameter of said test circuit comprises said processor adjusting the at least one value to compensate for the additional length of said longer test cable relative to said shorter test cable.

12. A hand-held, portable tester for testing a starter/charger system of an internal combustion engine according to claim 8, wherein said electronic test circuit is further characterized by performing at least one test on a starting unit of the starting/charging system, at least one test on a battery of the starting/charging system, and at least four tests on a charging unit of the starting/charging system, at least one of said tests on the charging unit of the starting/charging system being a diode ripple test.

13. A hand-held, portable tester for testing a starter/charger system of an internal combustion engine according to claim 5, wherein said electronic test circuit is further characterized by performing at least one test on a starting unit of the starting/charging system, at least one test on a battery of the starting/charging system, and at least four tests on a charging unit of the starting/charging system, at least one of said tests on the charging unit of the starting/charging system being a diode ripple test.

14. A hand-held, portable tester for testing a starter/charger system of an internal combustion engine according to claim 1, wherein said detection circuitry is characterized by automatic alternative identification of a shorter test cable connected to said housing connector and an alternative longer test cable connected to said housing connector, and wherein said test circuit adjusts at least one parameter of said test circuit, responsive to said detection circuit detecting said shorter test cable, to compensate for the shorter length of said shorter test cable relative to said longer test cable.

15. A hand-held, portable tester for testing a starter/charger system of an internal combustion engine according to claim 1, wherein said detection circuitry is characterized by automatic alternative identification of a shorter test cable connected to said housing connector and a longer test cable connected to said housing connector, and wherein said test circuit adjusts at least one parameter of said test circuit, responsive o said detection circuit detecting at least one of said longer test cable and said shorter test cable, to compensate for the difference in length between said longer test cable and said shorter test cable.

16. A hand-held, portable tester for testing a starter/charger system of an internal combustion engine according to claim 15, wherein said test circuit further comprises a processor in circuit communication with said detection circuitry, said processor performing at least one calculation on at least one value while performing the at least one test on the starting/charging system, and wherein said test circuit adjusting at least one parameter of said test circuit comprises said processor adjusting the at least one value to compensate for the difference in length between said longer test cable and said shorter test cable.

17. A hand-held, portable tester for testing a starter/charger system of an internal combustion engine according to claim 15, wherein said longer test cable comprises an extender cable in circuit communication between a test cable and said housing connector, and wherein said test circuit adjusts at least one parameter of said test circuit, responsive to said detection circuit detecting at least one of said extender cable and said shorter test cable, to compensate for the difference in length between said longer test cable and said shorter test cable.

18. A hand-held, portable tester for testing a starter/charger system of an internal combustion engine according to claim 17, wherein said test circuit further comprises a processor in circuit communication with said detection circuitry, said processor performing at least one calculation on at least one value while performing the at least one test on the starting/charging system, and wherein said test circuit adjusting at least one parameter of said test circuit comprises said processor adjusting the at least one value to compensate for the difference in length between said longer test cable and said shorter test cable.

19. A hand-held, portable tester for testing a starter/charger system of an internal combustion engine according to claim 15, wherein said longer test cable comprises an extender cable in circuit communication between said shorter test cable and said housing connector, and wherein said test circuit adjusts at least one parameter of said test circuit, responsive to said detection circuit detecting at least one of said extender cable and said shorter test cable, to compensate for the difference in length between said longer test cable and said shorter test cable.

20. A hand-held, portable tester for testing a starter/charger system of an internal combustion engine according to claim 19, wherein said test circuit further comprises a processor in circuit communication with said detection circuitry, said processor performing at least one calculation on at least one value while performing the at least one test on the starting/charging system, and wherein said test circuit adjusting at least one parameter of said test circuit comprises said processor adjusting the at least one value to compensate for the difference in length between said longer test cable and said shorter test cable.

21. A hand-held, portable tester for testing a starter/charger system of an internal combustion engine according to claim 1, wherein said detection circuitry comprises a voltage divider having at least first and second resistances separated by a central node, wherein said first resistance is in circuit communication between the central node and at least one connection of said first plurality of connections of said housing connector, and wherein automatic identification of the type of test cable connected to said housing connector is based at least in part on a voltage present at the central node with the test cable connected to said housing connector.

22. A hand-held, portable tester for testing a starter/charger system of an internal combustion engine according to claim 1, wherein said detection circuitry comprises a voltage divider having at least first and second resistances separated by a central node, wherein said first resistance is in circuit communication between the central node and at least one connection of said first plurality of connections of said housing connector, and wherein said detection circuitry further comprises a third resistance, said third resistance being in circuit communication between the central node and at least one other connection of said first plurality of connections of said housing connector, and wherein automatic identification of the type of test cable connected to said housing connector is based at least in part on a voltage present at the central node with the test cable connected to said housing connector.

23. A hand-held;

portable tester for testing a starter/charger system of an internal combustion engine according to claim 1, wherein said electronic test circuit is further characterized by performing at least one test on a starting unit of the starting/charging system, at least one test on a battery of the starting/charging system, and at least four tests on a charging unit of the starting/charging system, at least one of said tests on the charging unit of the starting/charging system being a diode ripple test.

24. A method of testing a starting system of an internal combustion engine, comprising the steps of:

(a) determining a base battery voltage corresponding to a measured voltage of a battery connected to the starting system;

(b) establishing a cranking start threshold voltage from the base battery voltage;

(c) establishing a cranking end threshold voltage from the base battery voltage;

(d) monitoring the battery voltage of the battery connected to the starting system;

(c) responsive to the battery voltage dropping to the cranking start threshold voltage, waiting a predetermined period of time and then determining N successive battery voltages corresponding to N successive voltages of the battery connected to the starting system;

(f) deetermining which M of the N successive battery voltages are to be used to analyze the starting system;

(g) determining a starter test voltage using the M battery voltage values;

(h) if the starter test voltage is greater than a predetermined voltage, displaying a first indication with respect to the starter system;

(i) if the starter test voltage is less than a predetermined voltage, displaying a second indication with respect to the starter system;

(j) if the starter test voltage is between first and second predetermined voltages;

i. determining, from at least the starter test voltage, a threshold temperature corresponding to a temperature of the battery connected to the starting system;

ii. prompting a user to input a temperature condition of the battery connected to the starting system;

iii. reading the temperature condition;

iv. determining, at least in part from the temperature condition relative to the determined threshold temperature, a condition of the starter system; and

v. displaying an indication corresponding to the determined condition of the starter system.

25. A method of testing a starting system of an internal combustion engine according to claim 24, wherein M equals N.

26. A method of testing a starting system of an internal combustion engine according to claim 24, wherein M equals one.

27. A method of testing a starting system of an internal combustion engine according to claim 24, wherein said step (g) comprises the step of determining a starter test voltage by taking an average value of the M battery voltage values.

28. A method of testing a starting system of an internal combustion engine according to claim 24, wherein said step (j)(ii) comprises the steps of displaying the determined threshold temperature to the user and prompting the user to input whether the battery connected to the starting system is greater than or less than the determined threshold temperature.

29. A method of testing a starting system of an internal combustion engine according to claim 24, wherein said step (j)(i) comprises the step of determining, from at least the starter test voltage, a threshold temperature range defined by first and second temperatures and corresponding to a temperature range of the battery connected to the starting system, wherein said step (j)(ii) comprises the steps of displaying the determined threshold temperature range to the user and prompting the user to input whether the battery connected to the starting system is between the first and second temperatures defining the determined threshold temperature range, and wherein said step (j)(iv) comprises the step of Determining, at least in part from the temperature condition relative to the determined threshold temperature range, a condition of the starter system.

30. A method of testing a starting system of an internal combustion engine according to claim 24, wherein said step (f) comprises the step of determining which M of the N successive battery voltages are to be used to analyze the starting system based on whether any of the N successive battery voltages are greater than the cranking end threshold voltage.

31. A method of testing a starting system of an internal combustion engine according to claim 24, wherein said step (f) comprises the step of determining which M of the N successive battery voltages are to be used to analyze the starting system by setting M equal to N if none of the N successive battery voltages are greater than the cranking end threshold voltage and by setting M equal to N minus 1 if the Nth of the N successive battery voltages is greater than the cranking end threshold voltage.

32. A user interface method for facilitating the performance and management of multiple, sequentially performed tests on an internal combustion engine system being performed in a portable, hand-held tester, comprising the steps of:

(a) providing a hand-held, portable tester capable of performing multiple, sequentially performed tests of one or more parameters of the internal combustion engine system;

(b) providing a user with a user interface via the tester to permit the user to cause the tester to provide a display corresponding to a previously performed test; and

(c) providing a user with a user interface via the tester to permit the user to either, in the alternative, re-perform the previously performed test, or skip the previously performed test thereby retaining the results from the previous performance of the previously performed test.

33. A user interface method for facilitating the performance and management of multiple, sequentially performed tests on an internal combustion engine being performed in a portable, hand-held tester according to claim 32 further comprising the step of, while providing a display corresponding to a previously performed test, providing to the User with an indication that the user may skip the previously performed test thereby retaining the results from the previous performance of the previously performed test.

34. A user interface method for facilitating the performance and management of multiple, sequentially performed tests on an internal combustion engine being performed in a portable, hand-held tester according to claim 32 further comprising the step of while providing a display corresponding to a previously performed test, providing to the user with a visual indication that the user may skip the previously performed test thereby retaining the results from the previous performance of the previously performed test.

35. A user interface method for facilitating the performance and management of multiple, sequentially performed tests on an internal combustion engine being performed in a portable, hand-held tester, according to claim 32 wherein said step (c) comprises the step of providing the user with a user interface with the tester permitting the user to either, in the alternative for each previously performed step, re-perform the previously performed test, or skip the previously performed test thereby retaining the results from the previous performance of the previously performed test.

36. A user interface method for facilitating the performance and management of multiple, sequentially performed tests on an internal combustion engine being performed in a portable, hand-held tester according to claim 35 further comprising the step of, while providing a display corresponding to a previously performed test, providing to the user with an indication that the user may skip the previously performed test thereby retaining the results from the previous performance of the previously performed test.

37. A user interface method for facilitating the performance and management of multiple, sequentially performed tests on an internal combustion engine being performed in a portable, hand-held tester according to claim 35 further comprising the step of, while providing a display corresponding to a previously performed test, providing to the user with a visual indication that the user may skip the previously performed test thereby retaining the results from the previous performance of the previously performed test.

38. A user interface method for facilitating the performance and management of multiple, sequentially performed tests on an internal combustion engine being performed in a portable, hand-held tester according to claim 32 wherein said step (a) comprises the step of providing a hand-held, portable tester capable of performing at least (i) a starter test, (ii) a no load, curb idle charger test, (iii) a no load, fast idle charger test, (iv) a high load, fast idle charger test, and (v) a diode ripple test of the internal combustion engine system.

39. A user interface method for facilitating the performance and management of multiple, sequentially performed tests on an internal combustion engine system being performed in a portable, hand-held tester, comprising the steps of:

(a) providing a hand-held, portable tester capable of performing multiple, sequentially performed tests of one or more parameters of the internal combustion engine system;

(b) entering a first test state in which a user is prompted to place the tester and internal combustion engine system into a first test state;

(c) while in the first test state, automatically collecting at least one datum with respect to the internal combustion engine system;

(d) while in the first test state, displaying a first test result to the user with respect to the at least one datum collected in the first test state;

(e) then entering a next test state in which the user is prompted to place the tester and internal combustion engine system into a next test state;

(f) while in the next test state, automatically collecting at least one datum with respect to the internal combustion engine system;

(g) while in the next test state, displaying a next test result to the user with respect to the at least one datum collected in the next test state;

(h) performing steps (e)-(g) for at least one other sequentially performed test;

(i) providing the user with a first input device;

(j) while in one of the plurality of next test states, responsive to the user actuating the first input device, entering the previous test state, if any, causing the tester to provide a display corresponding to the previously performed test of the previous test state;

(k) providing the user with a second input device;

(l) while in any of the plurality of test states corresponding to a test that has been previously performed, responsive to the user actuating the second input device, skipping the presently displayed test and advancing to the next test state, thereby retaining the results from the previous performance of that particular previously performed test.

40. A user interface method for facilitating the performance and management of multiple, sequentially performed tests on an internal combustion engine being performed in a portable, hand-held tester according to claim 39 further comprising the step of, while providing a display corresponding to a previously performed test, providing to the user with an indication that the user may skip the previously performed test thereby retaining the results from the previous performance of the previously performed test.

41. A user interface method for facilitating the performance and management of multiple, sequentially performed tests on an internal combustion engine being performed in a portable, hand-held tester according to claim 39 further comprising the step of, while providing a display corresponding to a previously performed test, providing to the user with a visual indication that the user may skip the previously performed test thereby retaining the results from the previous performance of the previously performed test.

42. A user interface method for facilitating the performance and management of multiple, sequentially performed tests on an internal combustion engine system being performed in a portable, hand-held tester, comprising the steps of:

(a) providing a hand-held, portable tester capable of performing multiple, sequentially performed tests of one or more parameters of the internal combustion engine system, the tester having a plurality of test states;

(b) providing a user with a user interface via the tester to permit the user to cause the tester to providing a display corresponding to a previous test state; and

(c) providing a user with a user interface via the tester to permit the user to either, in the alternative, re-perform actions associated with the previous test state, or skip the previous test state thereby retaining input, if any, inputted while previously in that previous test state.

43. A user interface method for facilitating the performance and management of multiple, sequentially performed tests on an internal combustion engine being performed in a portable, hand-held tester according to claim 42 further comprising the step of, while providing a display corresponding to a previous test state, providing to the user with an indication that the user may skip the previous test state thereby retaining input, if any, inputted while previously in that previous test state.

44. A user interface method for facilitating the performance and management of multiple, sequentially performed tests on an internal combustion engine being performed in a portable, hand-held tester according to claim 42 further comprising the step of, while providing a display corresponding to a previous test state, providing to the user with a visual indication that the user may skip the previous test state thereby retaining input, if any, inputted while previously in that previous test state.