Detection device and method for engine misfiring, and cross-ride vehicle

Abstract

The engine misfire detection device of the present invention restricts the vehicle operation based on the misfire detection when it is determined that the throttle operation is frequently performed during the misfire detection based on the change in the engine rotational speed. The misfire detection unit 42c of the ECU mounted on the straddle-type vehicle includes a rotational speed detection device that detects the rotational speed of the engine, and a misfire detection device that detects the misfire of the engine based on the engine rotational speed. The exhaust gas deterioration determination unit 42g includes an operation device for causing the saddle-ridden vehicle to perform a predetermined operation in accordance with the detection result of the misfire detection device. The load variation detection unit 42b includes a throttle opening interlocking data acquisition device that sequentially acquires throttle opening interlocking data that varies with a change in the throttle opening of the engine, and a throttle opening based on the sequentially acquired throttle opening. The degree of interlocking data is a motion limiting device that restricts the saddle-ridden vehicle to perform a predetermined motion by the motion device.

Description

technical field [0001] The present invention relates to an engine misfire detection device and method, and a saddle-ride vehicle, and particularly relates to optimization of vehicle behavior for engine misfire detection. Background technique [0002] Environmental measures are also urgently needed for motorcycles and other riding-type vehicles. In particular, misfire of the engine deteriorates the exhaust gas of the engine, or damages a catalyst included in the exhaust system of the engine, so accurate detection thereof is desired. In view of this point, in the following Patent Document 1, a change in the rotational speed of the engine (the rotational speed of the crankshaft) is monitored, and misfire of the engine is detected therefrom. That is, when the desired increase in the rotational speed of the engine does not occur during the power stroke, it is determined that misfire has occurred. According to this method, it is possible to detect engine misfire without signific...

AI Technical Summary

Problems solved by technology

Therefore, when driving on a bad road, the throttle valve is sometimes operated arbitrarily or unconsciously frequently

In addition, even when not traveling on a bad road, etc., the rider may arbitrarily and frequently operate the throttle valve during rapid operation, etc.

[0005] When the throttle operation is performed frequently in this way, in the method of monitoring changes in the rotation speed of the engine, the accuracy of misfire detection deteriorates

Especially in a saddle-riding vehicle equipped with an electronically controlled fuel injection device (fuel injection) that uses a computer to control the amount of gasoline injection, if the throttle valve is operated frequently, there will be a lag in the control system and the accuracy of fuel adjustment will be reduced. Aggravation, the case where combustion becomes unstable

At this time, the influence of the control hysteresis is also manifested in the change of the rotational speed of the engine, and as a result, the accuracy of misfire detection also deteriorates.

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