| 摘要 |
<p>A controller and control method of a reducing agent injector capable of accurately providing a required amount of ammonia to a reduction catalyst is provided. A reducing agent injector controller for controlling a reducing agent injector by controlling ON/OFF of a switching device to control energization of an electromagnetic solenoid, including: a target injection amount calculator for calculating a target injection amount of the reducing agent; a first current output signal calculator for calculating the duration of providing a first current output signal for generating a first current to be provided to the electromagnetic solenoid at the start of injection and calculating the DUTY ratio of the first current output signal; a second current output signal calculator for calculating the DUTY ratio representing the duration of providing a second current output signal for generating a second current to be provided after the first current is provided; a temperature calculator for estimating a given type of temperature within the reducing agent injector; and an output signal corrector for correcting at least one of the first current output signal and the second current output signal based on the given type of temperature estimated.</p> |
