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公开(公告)号：DE4309627C2
公开(公告)日：1996-09-19
申请号：DE4309627
申请日：1993-03-24
Applicant: MAZDA MOTOR
Inventor： GOTO TSUYOSHI , HATAMURA KOUICHI , SHOJI MASATOSHI
IPC: F01L1/34 , F02B29/08 , F02B33/00 , F02B33/36 , F02B33/44 , F02D13/02 , F02D15/04 , F02D23/00 , F02B29/04
Abstract: The invention provides a supercharged engine including a supercharger and an intercooler disposed downstream of the supercharger. The engine has a geometric compression ratio equal to or higher than 8.5. The supercharger is an internal compression type mechanical supercharger having a pressure ratio higher than 1.8 wherein the pressure ratio is defined as a ratio of a pressure at an inlet opening to a pressure at an exit opening of the supercharger. Intake valve closing timing of the engine supercharger is in the range of 50 to 100 degrees in crank angle as measured from bottom dead center, and an overlapping period during which both intake and exhaust valves open is equal to or below 17 degrees in crank angle wherein the intake valve closing timing is defined as the timing when valve lift is equal to or less than 1 millimeter, and the overlapping period is to be measured on the basis of a valve lift of zero.
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公开(公告)号：DE4309627A1
公开(公告)日：1994-02-03
申请号：DE4309627
申请日：1993-03-24
Applicant: MAZDA MOTOR
Inventor： GOTO TSUYOSHI , HATAMURA KOUICHI , SHOJI MASATOSHI
IPC: F01L1/34 , F02B29/08 , F02B33/00 , F02B33/36 , F02B33/44 , F02D13/02 , F02D15/04 , F02D23/00 , F02B39/04 , F02B29/04
Abstract: The IC engine supercharger is of mechanical type with a compression and pressure ratio exceeding 1.8, with the pressure ratio defined as the pressure ratio at the inlet aperture to that at the outlet aperture of the supercharger. The closure time point of the supercharger inlet valve lies within the region of the chamber shaft angle of 50 to 100 deg., measured from BDT. The overlapping interval, in which both the inlet and outlet valves open, is max. identical to the crankshaft angle of 17 deg. The closure time point of the inlet valve is the time of valve stroke of max. 1 mm, while the overlapping interval relates to zero valve stroke. ADVANTAGE - High geometrical engine compression ratio, retarded inlet valve closure time point, and improved supercharging.
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公开(公告)号：JP2001073786A
公开(公告)日：2001-03-21
申请号：JP24371899
申请日：1999-08-30
Applicant: MAZDA MOTOR
Inventor： MATSUE KOTA , IMAI TAKESHI , EBINO HIROSHI , SHOJI MASATOSHI
IPC: F02B37/24
Abstract: PROBLEM TO BE SOLVED: To correct dispersion controlled negative pressure and supercharging efficiency derived from individual difference and secular change of electromagnetic valve which generates and supplies control negative pressure according to duty ratio to negative pressure operated actuator which controls supercharging efficiency by controlling nozzle opening of supercharger turbine. SOLUTION: This electromagnetic valve 37 generates negative pressure responding to duty ratio signal from control unit 100, and supplies it to negative pressure actuator 30 through negative pressure passage 36. Negative pressure actuator 30 drives mobile vane 24 of supercharger 20 and controls nozzle opening according to extent of negative pressure supplied. At idling when output change is little, control unit 100 inputs specified duty ratios into electromagnetic valve 37, and at that time, calculates deviation between standard negative pressure and that inside negative pressure passage 36 detected by negative pressure sensor 83, and sets the duty ratio after correcting error.
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公开(公告)号：JPH0749074A
公开(公告)日：1995-02-21
申请号：JP19641893
申请日：1993-08-06
Applicant: MAZDA MOTOR
Inventor： TANIGUCHI MASAAKI , SHOJI MASATOSHI , NIINAI SUSUMU
Abstract: PURPOSE:To secure stability of combustion and improve fuel consumption performance by regulating ignition timing delay angle correction according to an intake temperature by means of a correction means in the case that a detected operation condition of an engine is in an intercooler bypass area. CONSTITUTION:Operation condition detection signals are input to a control part 4 from an intake temperature detection means 27, an engine speed sensor 34, and an aerometer or the like. The control part 4 obtains a reference ignition timing based on the input signals, a control map 46 and a delay angle correction map 47. It is judged whether engine operation at that time is in an intercooler bypass area or not based on an intake charge efficiency and an engine speed. When it is judged to be in the intercooler bypass area, a correction regulation means 45 is operated for obtaining a retarding amount corresponding to the intake temperature based on the delay angle correction map 47, and regulating the delay angle correction according to the intake temperature. An ignition execution means 44 sets a final ignition timing by the signal of the correction regulation means 45. Deterioration of combustibility due to ignition delay angle is suppressed in the intercooler bypass area where combustibility is naturally deteriorated, and stability of combustion is secured.
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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：JPS62126241A
公开(公告)日：1987-06-08
申请号：JP26448485
申请日：1985-11-25
Applicant: MAZDA MOTOR
Inventor： SHOJI MASATOSHI , KADOTA TAKASHI , TOMII TATSUYA
Abstract: PURPOSE:To unify torque occurring in each cylinder and enable the stabilization of engine revolutions by advancing fuel injection timing for cylinders of low suction filling efficiency as compared with fuel injection timing for cylinders of high suction filling efficiency. CONSTITUTION:The firing order (suction order) of cylinders 1a-1d is arranged as 1-3-4-2, and the suction filling efficiency of Nos. 2 and 3 cylinders 1b and 1c wherein the direction of suction air running in branch passages 2a-2d with said suction stroke gives a substantial fluctuation, becomes lower than that of other cylinders Nos. 1 and 4 1a and 1d. At a low load wherein the opening of a throttle valve 5 as detected by a throttle opening sensor 9 is less than a predetermined value, a control means 8 operates to make correction for advancing the injection timing of fuel injection valves 6b and 6c for Nos. 2 and 3 cylinders 1b and 1c of low suction filling efficiency, from that of fuel injection valves 6a and 6d for other cylinders Nos. 1 and 4 1a and 1d.
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公开(公告)号：JP2001073788A
公开(公告)日：2001-03-21
申请号：JP24371999
申请日：1999-08-30
Applicant: MAZDA MOTOR
Inventor： MATSUE KOTA , IMAI TAKESHI , EBINO HIROSHI , SHOJI MASATOSHI
Abstract: PROBLEM TO BE SOLVED: To aim at achieving both control accuracy and stability according to state of engine operation at feedback control, for supercharging pressure control system of engine which performs feedback control of supercharging pressure by controlling supercharger with variable efficiency. SOLUTION: This control system is provided with control unit 100 which sets target value of supercharging pressure in intake air passage 7 as well as that of negative pressure in negative pressure passage 36, by detecting operation state of engine 1 with engine rotation sensor 86 and accelerator opening sensor 87. Unit 100 performs feedback control which has excellent accuracy based on actual supercharging pressure, for prevention of excessive rotation and emission measure of supercharger 20, when the state of operation of engine 1 is at high load, or in a state where reflux of exhaust gas takes place through reflux passage 50, and, otherwise, during normal operation, it performs negative pressure feedback control which has excellent control response based on actual pressure and control stability.
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公开(公告)号：JPH04358742A
公开(公告)日：1992-12-11
申请号：JP3308191
申请日：1991-02-27
Applicant: MAZDA MOTOR
Inventor： KIMURA OSAMU , SHOJI MASATOSHI , YAMAKAWA MASANAO , TANAKA KAZUAKI
Abstract: PURPOSE:To prevent the lowering of accuracy such as ignition timing control in sesponse to the variation of a crank angle signal according to the change of valve timing when a crank angle sensor is installed in a cam shaft on which a valve timing change mechanism is provided. CONSTITUTION:A correcting means 6 is provided which is correcting the output of a crank angle sensor 2 according to the phase change of a cam shaft 1 with a valve timing change mechanism 10. It is preferable that, this correction is made gradually in response to a valve timing change operating time and also the learning correction of an operation time is conducted, and moreover a correction according to battery voltage or an engine speed is carried out.
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公开(公告)号：JPH04224243A
公开(公告)日：1992-08-13
申请号：JP40509190
申请日：1990-12-21
Applicant: MAZDA MOTOR
Inventor： SHOJI MASATOSHI , KIMURA OSAMU , YAMAKAWA MASANAO , TANAKA KAZUAKI
Abstract: PURPOSE:To prevent running shock by improving fuel consumption during automatic cruise operation even in case of an operation in an output range, and slowing down speed for changing output control during automatic cruise operation in ON state. CONSTITUTION:An engine control unit 30, makes engine output control by judging operation condition of an engine so as to transmit a control signal to a variable valve timing mechanism 40, and makings great account of engine output in an output range, making great account of fuel consumption in the other ranges by delaying closing timings of intake valve 13, 14 in comparison with engine control for, and carrying out control for making great account of fuel consumption when automatic cruise operation appears during operation in the output range. The engine control unit 30 makes, transfer speed of engine output control from great account of output to great account of the fuel consumption more slowly in comparison with that in the case of automatic cruise off operation.
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公开(公告)号：JPH0367032A
公开(公告)日：1991-03-22
申请号：JP20319389
申请日：1989-08-05
Applicant: MAZDA MOTOR
Inventor： NAKAYAMA TSUTOMU , SHOJI MASATOSHI , TOKUSHIGE HIROSHI , SHIMADA MASARU
Abstract: PURPOSE:To surely prevent generation of torque shock at the time of switching valve timing by providing a means for changing an engine speed to be changed over largely varies the engine speed in response that an air-fuel ratio set by an air-fuel ratio control means is larger than a theoretical air-fuel ratio. CONSTITUTION:At the time of lean combustion at which air-fuel ratio is larger than a theoretical air-fuel ratio, influence of residual combusted gas is increased at a high speed time at which intake and exhaust gas overlapping time is large, and torque is decreased rather than the lower speed time at which the overlapping is small. At a means 50 for changing engine speed to be changed over the engine speed to be changed is varied in response that an air-fuel ratio is larger than a theoretical air-fuel ratio so as to prevent generation of torque shock at the time of switching a valve timing.
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