摘要:
An engine ECU executes a program including the steps of: setting a knock waveform model corresponding to engine speed sensed by a crank position sensor (S108); calculating knock intensity N based on the result of comparison between a detected waveform and the set knock waveform model; when the knock intensity N is larger than a predetermined reference value (YES in S114), determining that knocking has occurred (S116); and when the knock intensity N is not larger than the predetermined reference value (NO in S114), determining that knocking has not occurred (S120).
摘要:
An engine ECU 200 includes a bandpass filter (1) (410), a bandpass filter (2) (420), and a bandpass filter (3) (430). The bandpass filter (1) (410) extracts only vibrations at a first frequency band A from the vibrations detected by a knock sensor. The bandpass filter (2) (420) extracts only vibrations at a second frequency band B from the vibrations detected by the knock sensor. The bandpass filter (3) (430) extracts only vibrations at a third frequency band C from the vibrations detected by the knock sensor. The first to third frequency bands A-C are identical in bandwidth. The engine ECU (200) calculates a peak value in magnitude of vibrations in a synthesized waveform of these frequency bands, and determines whether knocking occurred or not based on the peak value.
摘要:
An engine ECU executes a program including the steps of: detecting a waveform of vibration of an engine at a predetermined knock detection gate (S100); determining whether a detected vibration's waveform and a knock waveform model stored in memory match within a predetermined range; if the model and the detected vibration's waveform match within the predetermined range (YES at S102), determining that the engine knocks (S104); and if the model and the detected vibration's waveform do not match within the predetermined range (NO at S102), then determining that the engine does not knock (S108).
摘要:
A target throttle opening degree computing device (43-46) of a control apparatus computes a target throttle opening degree (ϑg) of a throttle valve (16) and includes a phase lead compensator (56). A filter (49) filters the target throttle opening degree (ϑg) to provide an ultimate target throttle opening degree (ϑt), which is used to drive a drive motor (15) to adjust an opening degree of the throttle valve (16).
摘要:
A target throttle opening degree computing device (43-46) of a control apparatus computes a target throttle opening degree (ϑg) of a throttle valve (16) and includes a phase lead compensator (56). A filter (49) filters the target throttle opening degree (ϑg) to provide an ultimate target throttle opening degree (ϑt), which is used to drive a drive motor (15) to adjust an opening degree of the throttle valve (16).
摘要:
A target throttle opening degree computing device (43-46) of a control apparatus computes a target throttle opening degree (ϑg) of a throttle valve (16) and includes a phase lead compensator (56). A filter (49) filters the target throttle opening degree (ϑg) to provide an ultimate target throttle opening degree (ϑt), which is used to drive a drive motor (15) to adjust an opening degree of the throttle valve (16).
摘要:
An engine ECU executes a program including the steps of: detecting a vibration corresponding to a first radial resonance mode by using a band-pass filter, from vibrations sensed by an in-cylinder pressure sensor provided at an upper central portion of the cylinder (S100); calculating knock intensity N based on a result of comparison between the detected waveform and a knock waveform model prepared in advance as a vibration waveform when knocking occurs (S108); determining that knocking occurred (S112) when the knock intensity N is larger than a predetermined reference value (YES in S110); and determining that knocking has not occurred (S116) when the knock intensity N is not larger than the predetermined reference value (NO in S110).