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公开(公告)号：JPH04237855A
公开(公告)日：1992-08-26
申请号：JP600291
申请日：1991-01-22
Applicant: MAZDA MOTOR
Inventor： SAKATA YUJI , MATSUBARA TOSHIO , KAURA MITSUHARU
Abstract: PURPOSE:To prevent such a fact that an engine cancels an asynchronous injection at time of gear shifting from exerting an adverse effect on travelability at time of running requisition, in the engine performing the asynchronous injection at the specified driving. CONSTITUTION:An injector 4 is installed in an intake passage 3. At time of normal driving, fuel is sprayed by an injection pulse synchronized with a crank angle. When an intake air quantity variation (dVS) becomes more than a first threshold value (KGTAVM), an asynchronous injection unrelated to the crank angle is carried out in addition to the synchronous injection. In addition, when shift operation takes place, a cancel time (Cgrind) is set as shown in (a) at time when a shift signal is changed to OFF from ON, and during this cancel time, the asynchronous injection is not carried out woven if the intake air quantity variation (dVS) becomes more than the first threshold value (KGTAVM). Even if it is in the cancel time, however, the dVS has come to more than a second threshold value (KGTAVMH) larger than the KGTAVM, the cancel time (Cgrind) is reset, performing the asynchronous injection.
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公开(公告)号：JPH03286163A
公开(公告)日：1991-12-17
申请号：JP8715390
申请日：1990-03-30
Applicant: MAZDA MOTOR
Inventor： MOMII KATSUHIRO , YAMAMOTO YOSHIMI , KAURA MITSUHARU
Abstract: PURPOSE:To improve the trouble judgement precision without incurring the reduction of the idle revolution speed by maintaining the stable idle revolution speed by spreading the range of the feedback correction value when the trouble of an auxiliary fluid feed control system is judged in idling. CONSTITUTION:When the output of an idle detecting means 101 is supplied, and an idle state is detected, auxiliary fluid is supplied from an auxiliary fluid feeding means 102 into the intake system of an engine. Then, a feedback control means 104 sets the correction quantity within a previously set correction range, and feedback control is carried out so that the idle revolution speed converges to an aimed revolution speed Which is set by a setting means 103 on the basis of the set quantity. The trouble of the auxiliary fluid control device is judged according to the correction quantity of the feedback control means 104 by an auxiliary fluid control device trouble means 105. Further, during the judgement of the trouble of the auxiliary fluid controller, the above-described correction range is spread by a correcting means 106.
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公开(公告)号：JPH03199649A
公开(公告)日：1991-08-30
申请号：JP33983389
申请日：1989-12-26
Applicant: MAZDA MOTOR
Inventor： INOUE TAKASHI , KAURA MITSUHARU , HAYAKAWA MOTOO
IPC: F02D41/18 , F02B75/22 , F02D41/36 , F02M35/108
Abstract: PURPOSE:To perform adjustment of a flow quantity equally with respect to both intake systems by arranging a bypass passage for bypassing a throttle valve at the downstream of an air flow meter of two systems, and communicating both the intake systems to each other and a flow adjustment means. CONSTITUTION:In a control unit 20a, a control valve 15a or 15b is closely controlled in a low flow range. Intake air introduced to the other side under a condition where introduction of the intake air to one of intake system is inhibited is allowed to flow through a bypass passage 12 which bypasses throttle valves 8a, 8b, and distributed to a cylinder group (banks) 1a, 1b of the two system while the flow quantity is controlled by an ISC valve 13. Every one-half of intake air quantity measured by an air flow meter 7a or 7b is supplied to the cylinder group of the two systems. Control performance of engine output adjustment element based on output of the air flow meter is improved in this way.
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公开(公告)号：JPH04140463A
公开(公告)日：1992-05-14
申请号：JP26223590
申请日：1990-09-29
Applicant: MAZDA MOTOR
Inventor： YAMAMOTO YOSHIMI , MOMII KATSUHIRO , KAURA MITSUHARU
Abstract: PURPOSE:To promptly perform a trouble diagnosis by a change of intake pipe pressure according to a difference between EGR amounts without causing misdecision by using a map, in which an exhaust gas recirculation amount is set such as providing a fixed negative pressure difference, when intake pipe pressure values at EGR time and at non-EGR time are obtained. CONSTITUTION:In the case of diagnosing a trouble of EGR in a control unit 13, first whether the present EGR is actuated or not is decided, and in the case of YES, action map of EGR, stored in the control unit 13, is switched to a map for EGR trouble diagnostic time to actuate a negative pressure solenoid valve 20 and an atmospheric solenoid valve 21 so as to obtain a fixed amount of EGR supply, and to control a negative pressure in a diaphragm chamber 17a so as to obtain a fixed value. Next, by a pressure sensor 23, after an intake negative pressure PON at this time is measured, the EGR is off-operated to measure an intake negative pressure POFF at this time and to obtain a difference PON-POFF between these measured values, and in the case of this difference within a predetermined range, the EGR map is returned from the trouble diagnostic time map to the normal operation time map because the EGR is normal.
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公开(公告)号：JPH01193060A
公开(公告)日：1989-08-03
申请号：JP1731588
申请日：1988-01-29
Applicant: MAZDA MOTOR
Inventor： SHOJI MASATOSHI , KOZUKI MASASHI , KAURA MITSUHARU
Abstract: PURPOSE:To surely prevent disorder in engine speed in idling by gradually retarding or advancing an ignition advanced angle according to an active state or inactive state of an air-fuel ratio sensor. CONSTITUTION:In an engine 1, an ignitor 3 and throttle valve 4 are controlled by a control means 2a so as to control an idling engine speed. Respective detected signals from an air-fuel ratio sensor 6 and a water temperature sensor 8 arranged on a cylinder block 7 and the like are input to the control means 2a. In such a case, when the air-fuel ratio sensor 6 becomes inactive, in the control means 2a, an ignition advanced angle is gradually retarded while intake air quantity is increased. Besides, when the air-fuel ratio sensor 6 becomes active, the ignition advanced angle is gradually advanced and the intake air quantity is reduced.
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Patent Agency Ranking
公开(公告)号：JPH06108922A
公开(公告)日：1994-04-19
申请号：JP26180692
申请日：1992-09-30
Applicant: MAZDA MOTOR
Inventor： MATSUBARA TOSHIO , KAURA MITSUHARU , TAKAGI KAZUYA
Abstract: PURPOSE:To prevent any supplementary gas from being supplied to only one cylinder so as to dissolve fluctuation of an engine rotational speed by setting the cycle of a duty control valve for controlling the amount of supplementary gas supplied into the intake system of an engine lower than the cycle of an intake stroke. CONSTITUTION:An evaporated fuel (supplementary gas) supplying passage 11 for supplying fuel (supplementary gas) evaporated from a fuel tank 10 into an intake passage 2 is connected to the intake passage 2 of an engine 1. A canister 12 for reserving evaporated fuel and a duty control valve 13 for controlling the supply amount of evaporated fuel are respectively arranged in the evaporated fuel supply passage 11. The duty control valve 13 is controlled by a control unit 16 on the basis of each detecting signal from each of sensors 4, 5, 7, 9 for detecting operating condition of the engine 1. At this time, the duty control valve 13 is opened/closed by a prescribed control frequency, and also the control frequency is changed so as to be extended by a prescribed length longer than the intake stroke time intervals of one same cylinder.
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公开(公告)号：JPH04136482A
公开(公告)日：1992-05-11
申请号：JP26108290
申请日：1990-09-28
Applicant: MAZDA MOTOR
Inventor： MATSUBARA TOSHIO , KAURA MITSUHARU , YAMAMOTO YOSHIMI
Abstract: PURPOSE:To improve the detecting frequency and attempt execute the detection in an early stage by detecting the octane number in any operation region, and judging the octane number from the correction quantity of the ignition timing at the generation time point of knocking, not from the number of times of generation of knocking. CONSTITUTION:The fuel injection quantity supplied from a fuel injection valve 8 and the ignition timing of the mixed gas in a combustion chamber 2 by a spark plug 12 are adjustment-controlled by a controller 28, on the basis of the signal of each sensor for detecting the operation state of an engine 1 and switches 14-21, besides a knock sensor 20 for detecting the knock vibration of an engine 1. In this case, it is detected that the change of the operation state is small, and the ignition timing of the mixed gas is forcibly corrected to the advance angle side gradually in this detection, and it is judged if the knocking due to this correction is generated or not. When the advance angle quantity of the ignition timing is large in the state where the generation of knocking is judged, it is judged that the octane number is high, while if the advance angle is small, it is judged that the octane number is low.
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公开(公告)号：JPH06200849A
公开(公告)日：1994-07-19
申请号：JP1799893
申请日：1993-01-08
Applicant: MAZDA MOTOR
Inventor： KAURA MITSUHARU , MATSUBARA TOSHIO
Abstract: PURPOSE:To prevent a fuel pump from being scattered in responsiveness and the like at transient tame by correcting slip in the quantity of fuel injection caused by scatter in performance of the fuel pump, its degradation and the like. CONSTITUTION:A fuel pump drive input value (duty ratio) is measured (S-4) at the time of suspending fuel injection, a hourly increasing rate of fun pressure due to an increase in a duty ratio is operated (S-10), the increasing rate of fuel pressure is compared with a calibration value which is set for a fuel pump set as a standard one in advance, and the slipage of the increasing rate from the calibration value is then determined, so that a basic drive characteristic value (basic duty ratio) is calibrated (S-11) in response to the slipage. And when fuel injection is restoted while calibration is being performed, the pulse width of each injector drive pulse is so calibrated (S-16) as to be reduced by a correction pulse width set in advance for an increment in fuel pressure, so that the quantity of fuel injection can be obtained, which is identical to the quantity of fuel injection in a state that no fuel pressure is increased.
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公开(公告)号：JPH0331543A
公开(公告)日：1991-02-12
申请号：JP16386689
申请日：1989-06-28
Applicant: MAZDA MOTOR
Inventor： KOZUKI MASASHI , MAEDA KENJI , KAURA MITSUHARU
Abstract: PURPOSE:To perform deceleration increase with increase in response to change in a torque curve so as to prevent torque variation or torque shock at the time of the deceleration increase by setting the deceleration increase of fuel small as the lean rate from the theoretical air-fuel of detection air-fuel ratio becomes large. CONSTITUTION:In an engine 1, a fuel injection valve 6 which is set at an intake passage 2 is controlled by a control unit 7 which is composed of a microcomputer and the like, based on respective output signals from an air flow sensor 4, a throttle opening sensor 8, an engine speed sensor 9, O2 sensor 10, a clutch switch 11, a brake switch 12 and an water temperature sensor 13. In this case, at the time of deceleration of the engine 1 detected by the engine speed sensor 9, fuel supply from the fuel injection valve 6 is increased. The air-fuel ratio of mixed air detected by the O2 sensor 10 is controlled by the control unit 7 so as to decrease the increase of the fuel as the lean rate from the theoretical air-fuel becomes large.
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公开(公告)号：JPH01193071A
公开(公告)日：1989-08-03
申请号：JP1731688
申请日：1988-01-29
Applicant: MAZDA MOTOR
Inventor： SHOJI MASATOSHI , KOZUKI MASASHI , KAURA MITSUHARU
IPC: F02M25/08
Abstract: PURPOSE:To prevent misarrangement of an air-fuel ratio and overflow of fuel by providing a gasoline property detecting means for detecting variation in evaporating quantity of fuel in a fuel storing part and a control means fro controlling opening of a valve means for varying a flow rate of evaporative fuel. CONSTITUTION:By on-off switching of a three-way solenoid valve 24 arranged in the middle of a piping 23, negative pressure or atmospheric air in an intake pipe 3 is selectively introduced into a pressure chamber of an opening/closing valve 21 to open/close a piping 20. The three-way valve 24 is on-off controlled by an ECU 28 based on a detected result of a gasoline property detecting means 29. In using high octane fuel, the opening/closing valve 21 is closed thereby purging evaporative fuel absorbed in a canistor 4 into an intake pipe 3 through a piping 18. Besides, in using regular fuel, the opening/closing valve 21 is opened thereby purging evaporative fuel absorbed in the canistor 4 in the intake pipe 3 through the pipings 18, 20. Since the purging quantity is adjusted in such a way, it is possible to prevent misarrangement of an air-fuel ratio and overflow of the fuel.
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