Engine control device and engine control method for straddle type vehicle
AssigneesYamaha Hatsudoki Kabushiki Kaisha, Yamaha Motor Co., Ltd.
InventorsTakeshi Matsuda, Hidenori Akatsuka, Daichi Noborio
Life of this patent
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Abstract
An engine control device capable of decreasing engine output while giving less uncomfortable feeling to the rider in the event of a failure, with a simple configuration. Engine output is decreased when a failure has been detected in a throttle valve. When engine speed after the occurrence of the failure is larger than preset target rotational speed at the time of the occurrence of the failure, an ignition of the engine is cut off. The engine speed thereby can be decreased according to the preset target rotational speed. Thus, engine output can be decreased uniquely.
Claims12
An engine control device for a straddle type vehicle, having engine output decreasing means for decreasing engine output when a failure has been detected in a throttle valve control system, the engine output decreasing means comprising:
- target rotational speed setting means for setting an engine speed, after the occurrence of the failure, to a target rotational speed required to decrease engine output;
- and
- rotational speed detection means for detecting the engine speed after the occurrence of the failure,
- wherein when the engine speed detected by the rotational speed detection means is larger than the target rotational speed, an ignition of the engine is cut off.
An engine control method for a straddle type vehicle, having engine output decreasing means for decreasing engine output when a failure is detected in a throttle valve control system, wherein the engine output decreasing means has an output decreasing mode in which engine output is decreased when a failure has been detected in a throttle valve control system,
- in the output decreasing mode, when engine speed after the occurrence of the failure is larger than preset target rotational speed at the time of the occurrence of the failure, an ignition of the engine is cut off.
Dependencies are inferred from the claim text.