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1. 发明专利

JPH06317195A THROTTLE VALVE CONTROLLER OF ENGINE 失效
公开(公告)号：JPH06317195A
公开(公告)日：1994-11-15
申请号：JP10327093
申请日：1993-04-28
申请人： MAZDA MOTOR
发明人： TAKEUCHI HIROYUKI , MINAMITANI KUNIKIMI , OIZUMI YUTAKA , YOSHIOKA HIROMI
IPC分类号： F02D29/02 , F02D9/02 , F02D41/04
摘要： PURPOSE:To provide throttle valve security controllers of an engine for altemping compatibility betweem security of pacceleration responsiveness and preventing of speed change shock even if acceleration transient condition occurs during speed change. CONSTITUTION:Throttle opening is kept at a specified opening regardless of engine rotational speed at the time of speed change, but keeping control of the throttle opening is released when a transient condition is detected during the speed change, in throttle valve controllers 300, 400 of an engine 100 for controlling openings of throttle valves 101, 103 in response to rotational speed of the engine 100.

2. 发明专利

JPH06137246A IDLING ROTATIONAL SPEED CONTROL METHOD FOR ENGINE 失效
公开(公告)号：JPH06137246A
公开(公告)日：1994-05-17
申请号：JP7750992
申请日：1992-03-31
申请人： MAZDA MOTOR
发明人： OIZUMI YUTAKA , ENDO KOJI
IPC分类号： F02D41/14 , F02D41/02 , F02D41/16 , F02D45/00 , F02P5/15
摘要： PURPOSE:To prevent rough idling at the time of cold operation due to retard for warming up a catalyst device by starting the feedback control by adjustment of ignition timing during the period of time when the retard for the ignition timing is executed. CONSTITUTION:First, data is input, and then an engine is started by turning on a starter switch. If the actual rotating speed Ne of the engine is smaller than 500rpm and during starting, the final ignition timing is set to a fixed advance value, and the rotating speed is raised rapidly near 500rpm. When the engine is started and the actual rotating speed Ne reaches 500rpm, a retard value TNTL is set and simultaneously the ignition timing feedback control is conducted, so that the feedback control is started at a lower rotating speed than conventional. Thus, the ignition timing is feedback controlled from a small advance value, and the engine rotating speed is raised slowly and smoothly to surely reach the target rotating speed No. Meanwhile, a catalyst device can be subjected to satisfactory warm-up.

3. 发明专利

JPH04314941A FUEL CONTROLLER FOR ENGINE 失效
公开(公告)号：JPH04314941A
公开(公告)日：1992-11-06
申请号：JP7966291
申请日：1991-04-12
申请人： MAZDA MOTOR
发明人： OIZUMI YUTAKA
IPC分类号： F02D41/02 , F02D41/14
摘要： PURPOSE:To improve the fuel consumption performance, securing the combustion stability, by controlling the air-fuel ratio to the lean side in comparison with the thoretical air-fuel ratio, in a prescribed operation region of the low or intermediate load.low and intermediate revolution of an engine, and by intermittently supplying fuel into each cylinder in every other cycle. CONSTITUTION:As for a control unit 21, each calculating means is provided for the light and left banks 2R and 2L, and the ordinary air-fuel ratio feedback control having a theoretical air-fuel ratio as aimed value is carried out for the left bank 2L. While, through the feedback control having the throretical air-fuel ratio as aimed air-fuel ratio is carried out for the right bank 2R, the lean control having the air-fuel ratio of 25 or so is carried out in a prescribed operation region where the demand output is relatively small, and at the same time, control is performed so that fuel is supplied intermittently in every other cycle, for each of the right bank cylinders 2R for carrying out the lean control.

4. 发明专利

JPH04292562A INTAKE DEVICE OF ENGINE 失效
公开(公告)号：JPH04292562A
公开(公告)日：1992-10-16
申请号：JP5473091
申请日：1991-03-19
申请人： MAZDA MOTOR
发明人： SHITANI YUJI , OIZUMI YUTAKA , SHIMAOKA SHINJI
IPC分类号： F02D9/02 , F02M25/07
摘要： PURPOSE:To prevent sticking of a second throttle valve by limiting reflux of the exhaust gas when open degree of the second throttle valve becomes smaller than the open degree of a first throttle valve by a predetermined value. CONSTITUTION:An electric throttle valve 12 is controlled with an open degree characteristic different from a mechanical throttle valve 11 in response to accelerator operation quantity, and an EGR valve 16 is controlled in response to the operation condition, but when open degree of the mechanical throttle valve 11 is more than a criterion open degree and open degree of the electric throttle valve is less than a criterion open degree, the EGR valve 16 is closed to prohibit reflux of the exhaust gas. When EGR is performed under the condition that open degree of the mechanical throttle valve 11 is relatively large and open degree of the electric throttle valve 12 is small, the reverse flow component to the upstream side of an intake passage arrives the electric throttle valve 12, passing through the mechanical throttle valve 11, but EGR is prohibited to prevent adherence of the EGR gas to the electric throttle valve 12, and sticking of the EGR gas is prevented.

5. 发明专利

JPH04140446A IDLE CONTROL DEVICE OF ENGINE 失效
公开(公告)号：JPH04140446A
公开(公告)日：1992-05-14
申请号：JP26185990
申请日：1990-09-30
申请人： MAZDA MOTOR
发明人： OIZUMI YUTAKA , KOJIMA MASATOSHI , SHIMAOKA SHINJI , SHITANI YUJI
IPC分类号： B60W10/04 , B60W10/06 , B60W10/10 , F02D9/10 , F02D41/08 , F02D41/16 , F02D45/00
摘要： PURPOSE:To improve controllability of a vehicle, when it is in reverse running, by providing a control amount correcting means which corrects a control amount of engine output control by an output control means in a direction of decreasing the control amount when a shift position of a transmission mechanism is placed in a reverse position. CONSTITUTION:In a control unit U during operation of an engine, signals from a sensor and switches 30 to 34 are input in addition to inputting an intake air amount signal from an air flow meter 11, to first discriminate whether a present operational condition is placed in an idle region or not, and next, when the discrimination is YES, to discriminate whether an air conditioner compressor 20 is placed in an action condition or not. Here, when the discrimination is YES, whether a shift position of an automatic transmission 35 is placed in a reverse position or not is discriminated, and when the position is discriminated NO, a target engine speed No of idle operation is set to a large value as compared with that when the compressor 20 is inoperative. On the other hand, when the shift position is decided YES(reverse), the idle speed No is set to a small value similar to when the compressor is inoperative.

6. 发明专利

JPH04136437A CONTROLLER OF ENGINE 失效
公开(公告)号：JPH04136437A
公开(公告)日：1992-05-11
申请号：JP26074090
申请日：1990-09-28
申请人： MAZDA MOTOR
发明人： MATSUMOTO HIROYUKI , OIZUMI YUTAKA
IPC分类号： F01L1/34 , F02D13/02 , F02D45/00 , F02P5/15
摘要： PURPOSE:To prevent the fluctuation of an engine control quantity so as to eliminate torque shock by detecting viscosity of operation oil in a hydraulic operational mechanism in a valve timing variable means, so as to set a delay time according to the viscosity, and varying the control logic of an engine control means after the lapse of the delay time. CONSTITUTION:It is judged by an ECU 36 whether the present situation is under the transient condition of valve timing switching and when it is under the transient condition, control of an engine ignition timing and a fuel injection quantity in compliance with the viscosity of engine oil is performed in a device in which a valve timing variation mechanism 27 for changing the close timing of an intake valve 4 is set on a cam shaft 11 for the intake side in relation to an intake valve 4, and a valve open/close timing is changed by switching action from the oil pressure supply to the mechanism 27 to return release by an oil pressure control means 26. The oil pressure P and oil temperature Th of operation oil in a valve timing variation mechanism are respectively calculated, and the responsing times of a valve timing switching mechanism is response to the calculated values P, Th are calculated, and the optimum ignition timing and fuel injection quantity are finally calculated after the lapse of responsing time.

7. 发明专利

JPH0315621A INTAKE DEVICE OF ENGINE 失效
公开(公告)号：JPH0315621A
公开(公告)日：1991-01-24
申请号：JP15131389
申请日：1989-06-13
申请人： MAZDA MOTOR
发明人： TOKUDA YOSHIHARU , ISOBE TOSHITAROU , ENDO KOJI , OIZUMI YUTAKA
IPC分类号： F02B27/02 , F02B75/22
摘要： PURPOSE:To obtain high output throughout the whole range of engine revolutions with a compact structure by connecting a second resonance chamber via an opening and closing valve, to a valley part between an intake passage and a resonance passage which is connected to a resonance chamber while being branched from the intake passage. CONSTITUTION:A resonance passage 30 is arranged above a connection part between a branch intake passage 9 extended from a surge tank 7 and right and left branch passages 9a, 9b which are connected to right and left cylinders 1. The resonance passage 30 is extended to an upper oblique part which is opposed to the branch intake passage 9 and connected to a resonance chamber 31. By this constitution, a second resonance chamber 34 is arranged at a V-shaped valley part 33 which is formed between the branch intake passage 9 and the resonance passage 30. The second resonance chamber 34 is connected to the resonance passage 30 through a port 35 to which an opening and closing valve 36 is set. Consequently, two resonance chambers 31, 34 are set in a compact style, and high output is obtained throughout the whole range of engine revolutions.

8. 发明专利

JPH01113556A INTAKE AIR CONTROL DEVICE FOR ENGINE 失效
公开(公告)号：JPH01113556A
公开(公告)日：1989-05-02
申请号：JP26875787
申请日：1987-10-24
申请人： MAZDA MOTOR
发明人： IWASHITA YOSHIKAZU , OIZUMI YUTAKA , HYODO KAZUAKI
IPC分类号： F02D41/16 , F02D41/00
摘要： PURPOSE:To reduce a decelerating shock by controlling an idling engine speed and supplying dash pot air during deceleration by intake air quantity adjusting means by-passing a throttle valve and varying a preset value during valve closing control of the adjusting means according to load. CONSTITUTION:Intake air quantity adjusting means A is disposed in a by-path by-passing a throttle valve in an intake passage. During idling state, the intake air quantity adjusting means is adapted to control using a deviation between the actual engine speed detected by the engine speed detecting means B and the target engine speed set by target engine speed setting means C as a parameter for controlling idling engine speed. When the decelerating operation is detected by detecting means D, the above adjusting means A is controlled to supply designated dash pot air, and when the engine speed is lowered less than a preset value, the adjusting means A is controlled in the valve opening direction in order to gradually decrease the dash pot air. In this case, the preset value can be varied according to load detected by load detecting means E by varying means F.

9. 发明专利

JPS63129146A AIR-FUEL RATIO CONTROL DEVICE FOR ENGINE 失效
公开(公告)号：JPS63129146A
公开(公告)日：1988-06-01
申请号：JP27428386
申请日：1986-11-18
申请人： MAZDA MOTOR
发明人： HYODO KAZUAKI , TAKAHASHI KOICHI , OIZUMI YUTAKA , IWASHITA YOSHIKAZU
IPC分类号： F02D41/14 , F02D41/00
摘要： PURPOSE:To continually improve control accuracy of air-fuel ratio, by equipping a control device with a heater ability detecting means, which detects heater ability of an exhaust sensor with heater, and a correcting means which receives an output from the heater ability detecting means correcting a feedback control signal in a control means. CONSTITUTION:If ability of a heater decreases due to its break or the like, the output characteristic of an exhaust sensor 18 changes in accordance with an exhaust temperature, but a feedback control signal of a control means 25 is corrected by a correcting means 26 so that the change of said output characteristic is compensated. Consequently, air-fuel ratio of a mixture is controlled in good accuracy to the target air-fuel ratio in accordance with an operative condition even when the heater causes its break or the like.

10. 发明专利

JPS6220943A SPEED SHIFT CONTROL DEVICE IN AUTOMATIC SPEED CHANGE GEAR 失效
公开(公告)号：JPS6220943A
公开(公告)日：1987-01-29
申请号：JP16049785
申请日：1985-07-20
申请人： MAZDA MOTOR
发明人： OIZUMI YUTAKA , SHIMIZU HIROSHI , OKAMOTO TOSHIHIRO , UEDA KANJI
IPC分类号： F16H61/00 , F16H59/74 , F16H61/02
摘要： PURPOSE:To prevent the economy of fuel consumption, etc. from deteriorating due to aging effect of an engine, by detecting always factors correlating to the operating time of the engine, and by shifting the speed shift point toward the high load side when it is judged that the operating time of the engine exceeds a predetermined time. CONSTITUTION:An operating time detecting means 203 for detecting a factor correlating to the operating time of an engine, such as, for example, a travel distance delivers signals to first and second shift change determining means 300, 301 so that second shift data are used if the operating time of the engine exceeds a set value while first shift data is used if the operating time is below the set value. Since the shift point of the second shift data is set to be nearer to the high load side than that of the first shift data, when the operating time of the engine becomes longer, the second data is automatically used to shift an automatic speed change gear.

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