| 摘要 |
A system for controlling the flow of hydraulic fluid in lines leading to and from a solenoid injector which actuates a temperature control valve. The solenoid injector controls the actuation a temperature control valve between a first state for inhibiting flow of temperature control fluid and a second state for allowing flow of a temperature control fluid. The solenoid injector receives a flow of pressurized hydraulic fluid along the hydraulic line from a fluid reservoir. In order to drain the hydraulic fluid from the hydraulic line after engine shut-off, the hydraulic line is dithered in accordance with a predetermined schedule. An engine computer determines when the engine has been shut-off. After determining that the engine has been shut-off, the engine computer sends signals to the solenoid injector causing it to actuate between its open and closed positions in accordance with a predetermined schedule.
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