Patent ID: 8406981
Filing Date: 2013-03-26
Classification: F02D

Abstract:
1. An engine throttle control system of a throttle-by-wire control system, the engine throttle control system configured to detect, as an electrical signal, an operation amount of a throttle operating device by use of a sensor and control a throttle opening degree of an engine in accordance with the detection signal, the engine throttle control system comprising: an operation amount detecting unit configured to detect the operation amount of the throttle operating device from the detection signal of the sensor; a basic throttle opening degree computing unit configured to compute a basic throttle opening degree corresponding to the operation amount; a throttle opening degree additional value computing unit configured to compute a throttle opening degree additional value corresponding to the operation amount of the throttle operating device, when the operation amount is within a predetermined small operation region; an adding unit configured to add the basic throttle opening degree and the throttle opening degree additional value; a throttle valve driving unit configured to control the throttle opening degree with an output of the adding unit being set as a target throttle opening degree when the operation amount is determined to be within the small operation region, and to control the throttle opening degree with the basic throttle opening degree being set as the target throttle opening degree when the operation amount is determined to exceed the small operation region; and a water-temperature sensor configured to detect a cooling water temperature representing a temperature of the engine, wherein the throttle opening degree additional value is set in advance in conjunction with the operation amount of the throttle operating device and the cooling water temperature.