Method and system for variable displacement engine diagnostics
An engine and actuation technology, applied in the direction of engine components, combustion engine, engine control, etc., can solve the problem that the fuel injection timing cannot be set correctly
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[0024] The following description relates to controls for engines (eg, figure 1 A system and method for a cylinder valve deactivation mechanism of an engine system). The cylinder valve deactivation mechanism may include an electrically latched rocker arm mechanism, such as in 2A to 2D Electric latch rocker mechanism depicted in . For example, by actuating a latch pin of the valve deactivation mechanism between an engaged position and a disengaged position via energizing an associated solenoid, the corresponding cylinder valve may be placed between an active state and a deactivated state switch, as in image 3 summarized in the table. For example, according to Figure 4 method and about Figure 11 To illustrate, the latch pin position, and thus the valve state, may be changed during engine start-up or shut-down, and, for example, according to Figure 5 method, the latch pin position and thus the valve state may be changed during transitions to and from a variable displace...
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