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1. 发明专利

JPH02108859A IDLING SPEED CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH02108859A
公开(公告)日：1990-04-20
申请号：JP26358988
申请日：1988-10-19
申请人： MAZDA MOTOR
发明人： NAKAGI KAZUYOSHI
IPC分类号： F02D41/16 , F02P5/145 , F02P5/15
摘要： PURPOSE:To prevent an engine stop and improve convergence to a target speed by setting the larger spark advance amount when a difference between an engine speed and the target speed is the larger in a speed range equal to or above the predetermined setting level, and setting the smaller spark advance amount when the difference is the larger in a speed range under the predetermined setting level. CONSTITUTION:When an internal combustion engine 1 is judged to be in the predetermined idling mode, the average Na of actual idling speeds during the past predetermined period is first obtained in a control unit 16. Then, a reference speed Nt is obtained from a difference between the deviation of a reference idling speed Nb and the aforesaid average Na, and an actual engine speed Ne. Furthermore, map retrieval is made on the basis of the reference speed Nt, thereby obtaining correction ignition timing. When the average Na is larger than the reference speed Nb, the ignition timing is corrected toward a delayed side. On the contrary, when the average Na is smaller than the reference speed Nb, the ignition timing is corrected toward an advance side.

2. 发明专利

JPS63223349A IDLING SPEED CONTROL DEVICE OF ENGINE 失效
公开(公告)号：JPS63223349A
公开(公告)日：1988-09-16
申请号：JP5862987
申请日：1987-03-13
申请人： MAZDA MOTOR
发明人： NAKAGI KAZUYOSHI , YAMADA TOSHIHIRO
IPC分类号： F02D41/16 , F02D29/02 , F02D41/00
摘要： PURPOSE:To have convergence into a target value for a short period of time by judging whether any external load is applied, and by adopting as feedback control initial value the feedback correction amount in the condition with no external load when any change occurs in the external load condition. CONSTITUTION:An external load sensing means A is furnished to judge whether any external load is applied and what the type is, and the open loop control valve is computed using a map by a calculating means according to the output signal therefrom. The target revolving speed is calculated at another calculating means D from external load judging signal and a coolant temp. sensor C, and difference from actual revolving speed is determined by a comparator means E. According to the difference in revolving speed thus obtained, the feedback correction amount of aux. air amount is calculated at a feedback control value calculating means F. At a control valve calculating means G, the open loop correction value is added to the feedback correction valve, and on the basis of the added result, the degree of opening of a control valve 10 is controlled.

3. 发明专利

JPS63223342A FUEL SUPPLY DEVICE OF ENGINE 失效
公开(公告)号：JPS63223342A
公开(公告)日：1988-09-16
申请号：JP5863187
申请日：1987-03-13
申请人： MAZDA MOTOR
发明人： NAKAGI KAZUYOSHI , YAMADA TOSHIHIRO
IPC分类号： F02D41/04 , F02D29/00 , F02D41/00
摘要： PURPOSE:To prevent drop of the revolving speed of engine by performing fuel increase control when transition is made from a specific operating condition to idling condition in case, e.g., the engine load is under a certain level and the gearing of speed change device is not in the running position. CONSTITUTION:In case the speed change device consists of an automatic speed changer when the car is running, a control unit 18 judges, from output of shift sensor 17, whether the shift range is neutral or parking range, and if yes, it is considered that the condition for fuel increase control is met when the engine revolving speed is under a certain level and the degree of throttle opening is below a certain specific valve. If no in shift range judgement, on the other hand, it is also judged that the condition for fuel increase control is met when the car speed is under a certain level (approx. 3km/h) and the degree of throttle opening is below specific value. At this time of judgement, injector 11 is controlled so that fuel increase is made gradually for a specific period of time.

4. 发明专利

JPS63223340A INTAKE AIR QUANTITY CONTROL DEVICE FOR ENGINE 失效
公开(公告)号：JPS63223340A
公开(公告)日：1988-09-16
申请号：JP5862887
申请日：1987-03-13
申请人： MAZDA MOTOR
发明人： NAKAGI KAZUYOSHI , YAMADA TOSHIHIRO
IPC分类号： F02D41/04
摘要： PURPOSE:To enable a required intake air quantity to be secured at the time of deceleration, in an engine in which dashpot control is carried out by supplying auxiliary air, by providing a means by which the reduction in the initial valve of dashpot control up to the starting time of dashpot control is lessened after the full-closing of a throttle valve. CONSTITUTION:On the basis of the output signals from an airflow sensor 6 and a crank angle sensor 11, a control unit 9 calculates the charging efficiency representing an engine load by means of a calculating means A, and on the basis of this charging efficiency and the engine speed the basic initial value of dashpot control is calculated by means of a calculating means B. Next, when the full-closing of a throttle valve 7 is judged by means of a calculating means C from the output of an airflow sensor 6, a correction is added to the basic initial value; when it is not so, the basic initial value is outputted to a calculating means D as it is as the initial value of dashpot control. And, after the throttle valve 7 has been fully closed, when a soft switch SW is turned ON after the lapse of a prescribed time, a dashpot control starting signal is outputted to operate a control valve 10 inside an auxiliary air passage 8 which bypasses the throttle valve 7.

5. 发明专利

JPS6480753A CONTROL DEVICE FOR ENGINE 失效
公开(公告)号：JPS6480753A
公开(公告)日：1989-03-27
申请号：JP23763087
申请日：1987-09-22
申请人： MAZDA MOTOR
发明人： NAKAGI KAZUYOSHI , OGAWA SEIZO , UENO TOSHINORI , TANAKA YUKIYA
IPC分类号： F02D41/06 , F02D41/00 , F02D45/00
摘要： PURPOSE:To make it possible to control the deterioration of an engine characteristics caused by increase in resistance loss by increasingly correcting an engine control quantity for a fixed period in starting an engine under its warm state. CONSTITUTION:An ISC valve 5 is driven by the output of a control unit 6 to control an intake air quantity for controlling an idling speed. In this case, when an engine is judged to be at the time of restarting under a half cooled state from an engine water temperature detected by a water temperature sensor 7, the number of engine revolutions detected by a crank angle sensor 9 and an issued starter signal, an incremental intake air quantity is added to ordinary intake air quantities at and after engine starting to increase a fundamentally set intake air quantity for an increase in the intake air quantity, which is controlled to be gradually decreased according to the magnitude of resistance loss of an engine 1 with the elapse of time. Thus, even when temperature differences occur on sliding contact parts of the engine 1 at the time of its starting under its warm state to cause increase in the resistance loss, the deterioration of an engine characteristics such as the number of engine revolutions can be prevented.

6. 发明专利

JPS63223355A ENGINE CONTROL DEVICE 失效
公开(公告)号：JPS63223355A
公开(公告)日：1988-09-16
申请号：JP5863087
申请日：1987-03-13
申请人： MAZDA MOTOR
发明人： NAKAGI KAZUYOSHI , YAMADA TOSHIHIRO
IPC分类号： F02D41/14 , F02D29/02 , F02D41/00 , F02D45/00
摘要： PURPOSE:To store proper study value at all times by controlling so that study is prohibited in case air from a force double device is introduced to the engine suction line with release of a brake device and, also, in case study control is under ill influence. CONSTITUTION:When conditions for to perform feedback control of air-to-fuel ratio are met in a control unit at the time of a car in operation, the feedback correction factor is calculated through adding or subtraction of a certain specific control amount to/from the current value in accordance with the output of an O2 sensor 21, followed by updating of the value. The fundamental injection pulse width is corrected with this correction factor to provide final injection pulse width, and thereby the injector 11 is controlled. If at this time the degree of opening of a throttle vale 10 is under a certain value and if the brake device is in operating condition, study is made to update the study value on the basis of the study correction factor obtained by averaging this correction factor, while the study is prohibited in case operation of the brake device is released to allow the air in a master bag 18 to be introduced.

7. 发明专利

JP2547561B2 失效
公开(公告)号：JP2547561B2
公开(公告)日：1996-10-23
申请号：JP5863087
申请日：1987-03-13
申请人： MAZDA MOTOR
发明人： NAKAGI KAZUYOSHI , YAMADA TOSHIHIRO
IPC分类号： F02D41/14 , F02D29/02 , F02D41/00 , F02D45/00

8. 发明专利

JPH07103046A CONTROL DEVICE FOR ENGINE WITH SUPERCHARGER 失效
公开(公告)号：JPH07103046A
公开(公告)日：1995-04-18
申请号：JP24676593
申请日：1993-10-01
申请人： MAZDA MOTOR
发明人： SUZUKI TAKASHI , KONDO JIRO , NAKAGI KAZUYOSHI
IPC分类号： F02D45/00 , F02D23/02 , F02D41/22 , F02D41/32
摘要： PURPOSE:To provide a control device for an engine with a supercharger in which an engine stop can be prevented from being generated even when torque is reduced by a fuel cut when a supercharge pressure is abnormally increased. CONSTITUTION:In an engine VE, when a supercharge pressure is abnormally increased, only when it is a preset value (300mmHg) or more further when an engine speed is a preset value (1500rpm) or more, fuel infection from a fuel injection valve 9 is stopped by a control unit C to perform a fuel cut. Consequently, even when the fuel cut is performed at the time of abnormally increasing the supercharge pressure, since the engine speed is not decreased to the preset value or less, an engine stop is prevented from being generated. Accordingly, while preventing generation of the engine stop, abnormally increasing the supercharge pressure can be effectively suppressed.

9. 发明专利

JPH06159118A FUEL CONTROL DEVICE FOR ENGINE 失效
公开(公告)号：JPH06159118A
公开(公告)日：1994-06-07
申请号：JP33232292
申请日：1992-11-17
申请人： MAZDA MOTOR
发明人： NAKAGI KAZUYOSHI
IPC分类号： F02D41/12
摘要： PURPOSE:To avoid excessive fuel injection during a delay period to prevent malfunction such as worsening fuel consumption performance in this period, by releasing regulation for minimum injection quantity to a fuel injecting means during the delay period for fuel cutting in a translation time to a deceleration condition. CONSTITUTION:In a control unit 20, the minimum injection quantity for allowing injection is set for preventing the unstableness of injection quantity because the injection quantity from a fuel injection valve 10 is reduced. However the regulation for the minimum injection quantity of a fuel injection valve 10 is released by confirmation when an engine rotational frequency is equal to a given rotational frequency or more and a throttle valve is fully closed by signals from a rotational frequency sensor 22 and an idle switch 21, in the control unit 20 at the time of translation to a deceleration condition; in the case where fuel supply is not to be immediately stopped but to be delayed for a given period, even a running condition is translated to a condition where a running condition is to be fuel-cut. Consequently, it is avoided that fuel is injected much quantity than needs in this delay period.

10. 发明专利

JPS63239337A INTAKE AIR QUANTITY CONTROLLER FOR ENGINE 失效
公开(公告)号：JPS63239337A
公开(公告)日：1988-10-05
申请号：JP7106387
申请日：1987-03-25
申请人： MAZDA MOTOR
发明人： YAMADA TOSHIHIRO , NAKAGI KAZUYOSHI
IPC分类号： F02D41/16 , F02D41/00
摘要： PURPOSE:To control an engine speed variation, by making the initial value of a feedback compensation value at the time of a start of feedback control over the idling speed, possible to be set so as to take the larger in value, the larger in external load on an engine. CONSTITUTION:When an engine is in a state of satisfying the specified driving condition, a feedback compensation value DF is set by a compensation value setting device A on the basis of a difference between actual speed and desired idling speed of the engine, and with this compensation value DF, a suction air quantity is controlled for feedback by a suction air quantity control device B. And, size of external load on the engine is detected by an external load detecting device C, whereby such compensation as making the compensation value DF larger is performed by an initial value compensating device D according to the size of the detected external load. And, when the engine is shifted from the state that it fails to satisfy the specified driving condition to that it satisfies it, such feedback control that uses the compensation value DF after compensation as the initial value is made so as to be performed.

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