Air bypass valve failure detection device in supercharging device for engine
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02B-033/00
출원번호
UP-0878117
(2007-07-20)
등록번호
US-7578128
(2009-09-08)
우선권정보
JP-2006-197589(2006-07-20)
발명자
/ 주소
Miyauchi, Atsuhiro
Hara, Hirofumi
Imamura, Kazuhiko
Andou, Yoshinori
출원인 / 주소
Honda Motor Co., Ltd.
대리인 / 주소
Squire, Sanders & Dempsey L.L.P.
인용정보
피인용 횟수 :
18인용 특허 :
4
초록▼
An air bypass valve failure detecting device outputs an opening command to an air bypass valve when a throttle valve suddenly closes, thereby prevent surging from occurring in a second intake passage between a turbocharger and a throttle valve. When the opening command is outputted to the air bypass
An air bypass valve failure detecting device outputs an opening command to an air bypass valve when a throttle valve suddenly closes, thereby prevent surging from occurring in a second intake passage between a turbocharger and a throttle valve. When the opening command is outputted to the air bypass valve, failure detection for the air bypass valve is permitted only if an intake air quantity of an engine immediately before a closing command is changed to the opening command is equal to or larger than a predetermined value. Thus, it is possible to prevent the failure detecting device from erroneously determining that the air bypass valve is normal although valve closing failure of the air bypass valve has occurred. This is because, when the intake air quantity is smaller than the predetermined value, surging does not occur in the second intake passage even if the valve closing failure of the airy bypass valve has occurred.
대표청구항▼
What is claimed is: 1. An air bypass valve failure detection device in a supercharging device of an engine, the supercharging device comprising: a first intake passage, a supercharger, a second intake passage, a throttle valve, and a third intake passage which are sequentially arranged from an upst
What is claimed is: 1. An air bypass valve failure detection device in a supercharging device of an engine, the supercharging device comprising: a first intake passage, a supercharger, a second intake passage, a throttle valve, and a third intake passage which are sequentially arranged from an upstream side to a downstream side in a flowing direction of an intake air flowing to a cylinder of the engine; a bypass passage bypassing the supercharger and connecting the first and second intake passages to each other; an air bypass valve provided in the bypass passage; the supercharging device outputting an opening command to the air bypass valve when a rate of change in a throttle valve opening degree is equal to or larger than a predetermined value in a throttle valve closing direction; the air bypass valve failure detection device comprising: failure detection permitting means for permitting failure detection for the air bypass valve when a command to the air bypass valve is an opening command and an intake air quantity of the engine immediately before the command is changed from a closing command to the opening command is equal to or larger than a predetermined value; surging determining means for determining whether surging has occurred in the second intake passage when the failure detection permitting means permits the failure detection for the air bypass valve; and failure determining means for determining that valve closing failure of the air bypass valve has occurred when the surging determining means determines that surging has occurred, and determining that the air bypass valve is normal when the surging determining means determines that surging has not occurred. 2. The air bypass valve failure detection device in a supercharging device of an engine according to claim 1, wherein the surging determining means extracts a specific frequency component of fluctuation in an intake pressure or fluctuation in an intake air quantity in the second intake passage, and determines that surging has occurred when an integrated value of the extracted values exceeds a predetermined value. 3. The air bypass valve failure detection device in a supercharging device of an engine according to claim 2, wherein the failure detection permitting means does not permit the failure detection until a predetermined time elapses after the command to the air bypass valve is changed from the closing command to the opening command. 4. The air bypass valve failure detection device in a supercharging device of an engine according to claim 2, wherein the surging determining means calculates the integrated value until a predetermined time elapses after the failure detection permitting means permits the failure detection; and the failure determining means determines that surging has occurred when the integrated value upon lapse of the predetermined time exceeds the predetermined value. 5. The air bypass valve failure detection device in a supercharging device of an engine according to claim 4, wherein the failure detection permitting means cancels the failure detection when the predetermined time elapses after the failure detection is permitted; and the surging determining means reduces the integrated value to zero when the failure detection permitting means cancels the failure detection. 6. An air bypass valve failure detection device in a supercharging device of an engine, the supercharging device comprising: a first intake passage, a supercharger, a second intake passage, a throttle valve, and a third intake passage which are sequentially arranged from an upstream side to a downstream side in a flowing direction of an intake air flowing to a cylinder of the engine; a bypass passage bypassing the supercharger and connecting the first and second intake passages to each other; an air bypass valve provided in the bypass passage; the supercharging device outputting an opening command to the air bypass valve when a rate of change in a throttle valve opening degree is equal to or larger than a predetermined value in a throttle valve closing direction; the air bypass valve failure detection device comprising: a failure detection permitting device for permitting failure detection for the air bypass valve when a command to the air bypass valve is an opening command and an intake air quantity of the engine immediately before the command is changed from a closing command to the opening command is equal to or larger than a predetermined value; a surging determiner for determining whether surging has occurred in the second intake passage when the failure detection permitting device permits the failure detection for the air bypass valve; and a failure determiner for determining that valve closing failure of the air bypass valve has occurred when the surging determiner determines that surging has occurred, and determining that the air bypass valve is normal when the surging determiner determines that surging has not occurred. 7. The air bypass valve failure detection device in a supercharging device of an engine according to claim 6, wherein the surging determiner extracts a specific frequency component of fluctuation in an intake pressure or fluctuation in an intake air quantity in the second intake passage, and determines that surging has occurred when an integrated value of the extracted values exceeds a predetermined value. 8. The air bypass valve failure detection device in a supercharging device of an engine according to claim 7, wherein the failure detection permitting device does not permit the failure detection until a predetermined time elapses after the command to the air bypass valve is changed from the closing command to the opening command. 9. The air bypass valve failure detection device in a supercharging device of an engine according to claim 7, wherein the surging determiner calculates the integrated value until a predetermined time elapses after the failure detection permitting device permits the failure detection; and the failure determiner determines that surging has occurred when the integrated value upon lapse of the predetermined time exceeds the predetermined value. 10. The air bypass valve failure detection device in a supercharging device of an engine according to claim 9, wherein the failure detection permitting device cancels the failure detection when the predetermined time elapses after the failure detection is permitted; and the surging determiner reduces the integrated value to zero when the failure detection permitting device cancels the failure detection.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (4)
Chvatal Dieter (Jenbach ATX) Fahringer Albert (Kossen ATX) Gruber Friedrich (Hippach ATX) Lutz Bernd (Schwaz ATX) Plohberger Diethard (Jenbach ATX), Apparatus for regulating an engine parameter.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.