Diagnostic device for vehicle engine analysis

Details Diagnostic device for vehicle engine analysis Diagnostic device for vehicle engine analysis

1990-08-10

1992-07-14

Black, Thomas G.

Boots, shoes, and leggings

36442403, 731173, G06F 1520

Patent

active

051309300

ABSTRACT:
A vehicle engine diagnostic device equipped with a forcible load-controller for forcibly changing, during operation, the drive conditions of a desired one of a plurality of driven loads, such as fuel injectors. If that driven load is functioning normally, changing its drive conditions by the forcible load-controller causes the operating conditions of the associated control unit, i.e., of the main control section, to change accordingly; if that driven load or any of its associated devices are out of order, no change occurs in the operating conditions of the control unit. Thus, the diagnostic device makes it possible to diagnose even driven loads which are not equipped with sensors as well as the devices associated therewith.

REFERENCES:
patent: 4094274 (1978-06-01), Harada et al.
patent: 4338896 (1982-07-01), Papasideris
patent: 4534214 (1985-08-01), Takahashi
patent: 4788858 (1988-12-01), Liebermann
patent: 4839811 (1989-06-01), Kanegae et al.
patent: 4906970 (1990-03-01), Momura
patent: 4943924 (1990-07-01), Kanegae et al.
patent: 4975847 (1990-12-01), Abe et al.

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