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1. 发明专利

JPH109008A CONTROL DEVICE OF ENGINE 失效
公开(公告)号：JPH109008A
公开(公告)日：1998-01-13
申请号：JP16002296
申请日：1996-06-20
申请人： MAZDA MOTOR
发明人： KOBAYASHI HIDEKI , KUSUNOKI HIDEKI
IPC分类号： F02M25/08 , F02D41/02 , F02D41/04 , F02D41/08 , F02D41/14
摘要： PROBLEM TO BE SOLVED: To avoid an unnecessary purge while preventing an evaporative fuel from leaking to the air at the time of idling. SOLUTION: An air-fuel ratio feedback control is performed using O2 sensors 27L, 27R. An evaporative fuel from a fuel tank 31 is adsorbed by a canister 33, and the evaporative fuel from the canister 33 is supplied as a purge gas together with an air to a surge tank 3 by opening a purge valve. A fuel concentration in the purge gas is determined based on a feedback correction value. When the fuel concentration is equal to or less than a predetermined value at the time of idling, the canister 33 has an enough adsorptive force to thereby prevent the leakage of the evaporative fuel. Accordingly, a purge execution is inhibited or a purge amount is reduced.

2. 发明专利

JPH04194347A CONTROLLER OF ENGINE 失效
公开(公告)号：JPH04194347A
公开(公告)日：1992-07-14
申请号：JP32820090
申请日：1990-11-27
申请人： MAZDA MOTOR
发明人： SHIMADA TOMOICHIRO , SASAKI KAZUTOMO , KUSUNOKI HIDEKI
IPC分类号： F02D45/00 , F02D41/24
摘要： PURPOSE:To enlarge a possible range of full close angle learning to the low rotation side so as to increase learning frequency by inhibiting the learning of the full close angle of a throttle valve in the case when a non-connection condition between an engine and its drive system is detected. CONSTITUTION:Charging efficiency of an engine 1 is detected by a control unit 20 based on an intake air quantity from an air flow sensor 4 and the engine speed from a crank sensor 10. In the case when a detected charging efficiency is lower than a set value preliminary set ber engine speed, an opening signal outputted from a throttle opening sensor 11 is learned in order as the full close angle of a throttle valve 5. When the clutch switch 8 is set ON, and a neutral judging switch 9 detects the neutral position, the full close angle learning is inhibited. Consequently, since the full close angle learning is performed only in a loaded operation condition, erroneous learning in the no-load operation condition is not performed at all, so as to enlarge a possible range of the full close learning.

3. 发明专利

JPH03249358A THROTTLE VALVE OPENING DETECTOR FOR ENGINE 失效
公开(公告)号：JPH03249358A
公开(公告)日：1991-11-07
申请号：JP4814690
申请日：1990-02-27
申请人： MAZDA MOTOR
发明人： SHIMADA TOMOICHIRO , KUSUNOKI HIDEKI , SASAKI KAZUTOMO
IPC分类号： F02D45/00
摘要： PURPOSE:To expand a learning in the full-close position of a throttle valve to the extent of outside of idling time by judging a full-close state of the throttle valve in a driving state other than the idling time, and storing the throttle valve opening as the full-close position at time of this full-close judgment for renewal. CONSTITUTION:When the fully-closed state of a throttle valve is judged by a full-close judging means 42 on the basis of output of a driving state detecting means 41, the throttle opening detected by a throttle opening detecting means is stored and renewed as a full-close position at a memory means 43. In brief, since a learning area of the throttle valve full-close position is expanded up to outside of idling time, for example, even in the case where the throttle valve is opened at once after engine starting and it shifts to a running state, the full-close position of the throttle valve is accurately specifiable, and fuel-cut control or the like at time of deceleration is properly performed, by way of example.

4. 发明专利

JPH10274084A CONTROL DEVICE FOR ENGINE 失效
公开(公告)号：JPH10274084A
公开(公告)日：1998-10-13
申请号：JP8042697
申请日：1997-03-31
申请人： MAZDA MOTOR
发明人： TSUKUDA ATSUNORI , KUSUNOKI HIDEKI , NAKAGI KAZUYOSHI , MATSUKADO MASAAKI , SASAKI KAZUNARI
IPC分类号： F02D41/12 , F02D41/32
摘要： PROBLEM TO BE SOLVED: To prevent torque shock by inhibiting stop of fuel regardless of decelerating operation during operating an intake compensating means by providing with the intake compensating means for compensating intake delay of a suction intake rate correcting rate on the basis of an engine load change, and a fuel stopping means for stopping feed of fuel temporarily. SOLUTION: While an engine 1 is operated, in an ECU 40, it is judged whether it is in a fuel stop control performance region or not. In the case of 'YES', it is judged whether a fuel stop control performance flag is 0 or not. In the case where the possibility of fuel stop is judged, a process is returned to an initial step without performing an order for fuel injection operation thereafter. In the case where it is judged that it is not in the fuel stop control region, and in the case where the fuel stop control performing flag is not 0, fuel injection is performed. Namely, a throttle is fully closed by a decelerating operation, and a target correcting rate is increased on the basis of load fluctuation, and thereby, the performance of fuel cut is inhibited in a condition in which an intake air rate is increased so as to prevent torque shock.

5. 发明专利

JPH109068A ENGINE CONTROL DEVICE 失效
公开(公告)号：JPH109068A
公开(公告)日：1998-01-13
申请号：JP16002596
申请日：1996-06-20
申请人： MAZDA MOTOR
发明人： KOBAYASHI HIDEKI , KUSUNOKI HIDEKI
IPC分类号： F02M25/08 , F02D41/02 , F02D41/08 , F02D41/16 , F02D43/00
摘要： PROBLEM TO BE SOLVED: To execute both feedback control and learning control in such a way that the revolving speed is turned into a target idling revolving speed at the time of idling, and concurrently prevent idle revolving speeds from being unstable when vaporized fuel is purged. SOLUTION: The opening of a bypass passage 8 bypassing a throttle valve 7, is adjusted by an ISC valve 9. The ISC valve 9 is controlled by means of feedback and means of learning in such a way that the revolving speed of an engine is turned out a target idle revolving speed at the time of idling. At the time of idling, a purge valve 36 is opened, and vaporized fuel is thereby purged to an intake passage 2 from a fuel tank 31. The amount of purging is so limited that the opening of the ISC valve 9 will not be small to the extent of a specified lower limit.

6. 发明专利

JPH109067A ENGINE CONTROL DEVICE 失效
公开(公告)号：JPH109067A
公开(公告)日：1998-01-13
申请号：JP16002496
申请日：1996-06-20
申请人： MAZDA MOTOR
发明人： KUSUNOKI HIDEKI , KOBAYASHI HIDEKI
IPC分类号： F02M25/08 , F02D31/00 , F02D41/00
摘要： PROBLEM TO BE SOLVED: To execute both feedback control and learning control in such a way that the revolving speed will be a target idle revolving speed at the time of idling, and determine a learning value while the period of purging is being sufficiently maintained when vaporized fuel is purged. SOLUTION: The opening of a bypass passage 8 bypassing a throttle valve 7, is adjusted by an ISC valve 9. The ISC valve 9 is controlled by means of feedback and means of learning in such a way that the revolving speed of an engine is turned out a target idle revolving speed at the time of idling. A feedback control valve is determined based on the amount of feedback correction. For the period of time since idle judgement has been made, a purging valve 36 is opened, vaporized fuel from a fuel tank 31 is purged to an intake passage 2, and no decision of a leaning value is made at this time. When the aforesaid specified period of time has elapsed, the leaning value is then decided, however, no purging of vaporized fuel is made at this time. When the learning value is thereby determined, for example, for the period of time until an automatic transmission is turned out to be at a D range position, vaporized fuel is thereby purged again.

7. 发明专利

JPH06129279A CONTROL DEVICE OF ENGINE 失效
公开(公告)号：JPH06129279A
公开(公告)日：1994-05-10
申请号：JP30474692
申请日：1992-10-15
申请人： MAZDA MOTOR
发明人： KUSUNOKI HIDEKI
IPC分类号： F02D41/04 , F02D41/08
摘要： PURPOSE:To certainly prevent rotational drop of an engine by delaying lowering of rotation of the engine in correspondence with delay of responsibility of an engine auxiliary machine delayinglowering of engine load against the lowering of rotation of the engine. CONSTITUTION:This is an engine control device furnished with an engine auxiliary machine P1 driven by an engine P2 and to delay lowering of engine load against lowering of rotation of the engine P2 as the engine load rises in correspondence with engine speed. Additionally, it is furnished with an actuation detection means P3 to detect actuation of the engine auxiliary machine P1, a lowering detection means P4 to detect lowering of the engine speed and a delay means P5 to delay the lowering of rotation of the engine P2 at the time when the engine auxiliary machine P1 is actuated in accordance with output of each of the detection means P3, P4 and at the time when the engine speed is lowered.

8. 发明专利

JPH04109043A FUEL CONTROL DEVICE FOR ENGINE 失效
公开(公告)号：JPH04109043A
公开(公告)日：1992-04-10
申请号：JP22864190
申请日：1990-08-29
申请人： MAZDA MOTOR
发明人： KUSUNOKI HIDEKI , SASAKI KAZUTOMO , SHIMADA TOMOICHIRO
IPC分类号： F02D41/04 , F02D41/12
摘要： PURPOSE:To suppress the fluctuation of an air-fuel ratio by constructing a device for increasing the intake air quantity at the time of detecting either one of engine deceleration and external load operation in such a way as to increase the fuel quantity in relation to the intake air increased time by engine deceleration when the intake air quantity is increased by external load operation. CONSTITUTION:A throttle chamber 3 is provided with a first to a third by-pass intake passages 7a-7c of respectively different diameters by-passing a throttle valve 6, and these intake passages 7a-7c are provided with a first to a third air by-pass valves V1-V3 serving as intake air quantity increasing means at the engine decelerating time and at the engine external load 'on' time so that the intake air supply quantity to be increased is regulated by the opened/closed state of these valves V1-V3. An air-fuel ratio is maintained to the set air-fuel ratio by correcting the basic fuel injection quantity by an ECU 9 according to the deviation between the actual air-fuel ratio detected by an O2 sensor 16 and the target air-fuel ratio. When the intake air quantity is increased by external load operation, it is so controlled as to increase the fuel quantity in relation to the intake air increased time by engine deceleration.

9. 发明专利

JPH0458032A FUEL CONTROL DEVICE FOR ENGINE 失效
公开(公告)号：JPH0458032A
公开(公告)日：1992-02-25
申请号：JP16809490
申请日：1990-06-25
申请人： MAZDA MOTOR
发明人： SUGA TOSHIYA , HANDA TOSHIHIRO , KUSUNOKI HIDEKI , SHIMADA TOMOICHIRO
IPC分类号： F02D41/04 , F02D41/06 , F02D45/00
摘要： PURPOSE:To improve startability by providing a first starting pulse supplying means for the first term of start, a second starting pulse supplying means, an engine-stop detecting means for the latter term of start, and a control means for prohibiting the supply of first starting pulse at the time of restart. CONSTITUTION:A CPU30 is provided with a first starting pulse supplying means for ensuring the injection quantity required for an engine 10 for the first term of start and the injection quantity for depositing fuel to an intake manifold, a second starting pulse supplying means for supplying second starting pulse set to the injection quantity required for the engine 10 for the latter term of start, an engine-stop detecting means for detecting the engine-stop, and a control means for prohibiting the supply of the above first starting pulse at the time of restart based on the detection of engine-stop by the engine-stop detecting means. Besides, a first starting pulse width P1 and a second starting pulse width P2 are respectively set so as to increase the starting pulse width P2 at the time of low water temperature with respect to the time of high water temperature. Further, the damping quantity K is set to increase the damping quantity K at the time of low water temperature relative to the time of high water temperature.

10. 发明专利

JPH0441949A DECELERATION CONTROLLER OF ENGINE 失效
公开(公告)号：JPH0441949A
公开(公告)日：1992-02-12
申请号：JP14661890
申请日：1990-06-05
申请人： MAZDA MOTOR
发明人： SASAKI KAZUTOMO , KUSUNOKI HIDEKI , HANDA TOSHIHIRO , SUGA TOSHIYA
IPC分类号： F02D41/12 , F02D33/00 , F02M23/04 , F02M69/32
摘要： PURPOSE:To effectively prevent overlean of intake gas by forbidding a deceleration increase quantity of the intake gas for a specified time when a bypass valve is closed in a device which opens a bypass valve for the specified time at the time of detecting the deceleration so as to perform the deceleration and quantity increase of the intake gas. CONSTITUTION:A second bypass intake passage 17 which bypasses a throttle valve 13 is provided, and an idle up bypass valve 18 is interposed on the way thereof. A third bypass intake passage 21 is provided for communicating substantially the upstream side from the upstream side opening part of a first bypass intake passage 15 in which an air flow sensor 16 is interposed with substantially downstream side from the downstream side opening part, and a deceleration and increase quantity bypass valve 22 is interposed on the way thereof. In this case, in a control unit 20, existence of deceleration in an engine E is judged, a deceleration and quantity increase bypass valve 22 is opened at the time of deceleration. Overrich of intake gas by the deceleration is prevented, and also the opening of sard valve 22 is forbidden for a specified time, when mistaken judgment of the deceleration is apt to take plate.

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