Engine cylinder deactivation test apparatus and method for...

Details Engine cylinder deactivation test apparatus and method for... Engine cylinder deactivation test apparatus and method for...

2005-12-20

2005-12-20

McCall, Eric S. (Department: 2855)

Measuring and testing

Internal combustion engine or related engine system or...

Compression

C073S116070, C123S435000

Reexamination Certificate

active

06976390

ABSTRACT:
An apparatus is provided for testing functionality of an engine cylinder deactivation control and system having a plurality of solenoid-operated valves for controlling hydraulic actuation of switching valve lifters. The apparatus includes a portable test box enclosing an electrical circuit connectable to the deactivation control. Also included are a ground lead for connection to the control ground, a solenoid lead for each cylinder and connectable to the solenoids of their respective cylinders, and external taps on the exterior of the box and connected one with each of the ground lead and the solenoid leads. Exemplary methods are disclosed for using the box to test for grounds and circuit resistance as well as proper operation of the system in a running engine.

REFERENCES:
patent: 5188081 (1993-02-01), Birk et al.
patent: 5816220 (1998-10-01), Stumpp et al.
patent: 6818841 (2004-11-01), McDonald
patent: 2005/0055152 (2005-03-01), Wakashiro et al.

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