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1. 发明专利

JPH09269057A CONTROL DEVICE OF AUTOMATIC TRANSMISSION 失效
公开(公告)号：JPH09269057A
公开(公告)日：1997-10-14
申请号：JP10387496
申请日：1996-03-31
申请人： MAZDA MOTOR
发明人： KAMATA SHINYA , NAGAYAMA SHIGERU , NAKANO SHIN , SAWA KENJI
IPC分类号： F16H59/14 , F16H59/38 , F16H61/00 , F16H61/02 , F16H61/06 , F16H61/08 , F16H61/686
摘要： PROBLEM TO BE SOLVED: To prevent racing of an engine at the time of designated speed change in which a first friction element is released and a second friction element is put in the connecting state in the case of controlling the working pressure in a connecting chamber of the first friction element to control the working pressure supplied to the second friction element at the above designated speed change time in an automatic transmission comprising a first friction element having a connecting chamber and a release chamber and a second friction element having an oil pressure chamber communicated with the release chamber. SOLUTION: In the case where 3rd-4th clutch pressure is indirectly controlled through a servo release pressure by controlling the servo apply pressure at the time of speed change 2nd-3rd at the time of lowering the servo apply pressure to control 3rd-4th clutch pressure when a speed change command is output, the servo apply pressure is checked from being lowered to a designated value or less, so that it is possible to prevent racing of an engine caused by sliding of 2nd-4th brake before the connecting operation of 3rd-4th clutch is started.

2. 发明专利

JPH07103325A HYDRAULIC CONTROL DEVICE FOR AUTOMATIC TRANSMISSION 失效
公开(公告)号：JPH07103325A
公开(公告)日：1995-04-18
申请号：JP25202393
申请日：1993-10-08
申请人： MAZDA MOTOR
发明人： KAMATA SHINYA , YOKOTA HIROAKI , NAGAYAMA SHIGERU , NAKAHARA YUJI , NAKANO SHIN , MARUSUE TOSHIHISA , ABE MITSUTOSHI , MATSUMOTO HIROYUKI
IPC分类号： F16H61/04
摘要： PURPOSE:To set an optimal initial value in spite of a change in an engine load, and reduce a speed change shock by setting a correction value corrected so as to reduce centrifugal oil pressure corresponding to rotating speed of a friction element from an initial value of shelf pressure according to the engine load, as an initial value of shelf pressure. CONSTITUTION:A shelf pressure initial value setting means 200A is arranged to set an initial value of speed change time shelf pressure according to throttle opening at speed change time by receiving output of a throttle opening sensor 202. A centrifugal oil pressure detecting means 200B is arranged to detect centrifugal oil pressure according to output of a turbine rotating speed sensor 205 of a torque converter. A correction value corrected so as to reduce the centrifugal oil pressure detected from the initial value of the preset shelf pressure is set as an initial value of shelf pressure by a first shelf pressure initial value correcting means 200C. When this correction value becomes lower than an oil pressure reduction lower limit value W, this lower limit value W is set as the initial value of the shelf pressure by a second shelf pressure initial value correcting means 200D, and a duty solenoid valve 90 is controlled.

3. 发明专利

JPH05346161A 失效
公开(公告)号：JPH05346161A
公开(公告)日：1993-12-27
申请号：JP17928092
申请日：1992-06-12
申请人： MAZDA MOTOR
发明人： KAMATA SHINYA , NAGAYAMA SHIGERU , SUMIMOTO TAKAYUKI , KURIYAMA MINORU
IPC分类号： F16H61/04 , F16H61/08 , F16H61/10
摘要： PURPOSE:To always favorably control speed change when speed change operation is simultaneously performed in a main and a sub-transmissions by controlling the coupling force of a friction element for changeover of shift step in the normal driving condition of the sub-transmission, and controlling the coupling force of a friction element for engine brake in its reverse driving condition. CONSTITUTION:An automatic transmission 1 is constituted of a torque converter 10, a main transmission 20 arranged on the concentrical axis of it, and a sub- transmission 30 arranged on the parallel axis with the former. The sub- transmission 30 is provided with a single planetary gear mechanism 31, a direct coupling clutch 32 is arranged between the ring gear 31a and the sun gear 31b, and a one-way clutch 33 and a deceleration brake 34 are arranged between the sun gear 31b and a transmission case 3. In this case, when speed change operation is simultaneously performed in the main and sub- both transmissions and the sub-transmission 30 is in the normal driving condition driven by engine output for example, the direct coupling clutch 32 is controlled so as to change the gear ratio of the sub-transmission according to change of gear ratio of the main transmission 20.

4. 发明专利

JPH05296328A 失效
公开(公告)号：JPH05296328A
公开(公告)日：1993-11-09
申请号：JP12817292
申请日：1992-04-20
申请人： MAZDA MOTOR
发明人： KURIYAMA MINORU , KAMATA SHINYA , NAGAYAMA SHIGERU , SUMIMOTO TAKAYUKI
IPC分类号： F16H61/04 , B60K17/10 , F16H61/08
摘要： PURPOSE:To control the supply/discharge of a coupling pressure suitable to respective requests, even in either case of a different speed change time in which the same friction element takes part. CONSTITUTION:A first oil passages 111, 113 having a control valve 101 and an accumulator 116 and a second oil passage 104 providing a linear solenoid valve 103 are provided as an oil passage communicating with the first hydraulic room 321 of a direct connection clutch 32 and also a shift valve 65 communicating them with the first hydraulic room 321 of the direct connection clutch 32 selectively is provided. In a speed change time when the direct connection clutch 32 is coupled, a coupling pressure is controlled and supplied to the clutch 32 by the operation of the accumulator 116 through the first oil passages 111, 113 and in the speed change time when the other friction element is coupled and the direct connection clutch 32 is released, the coupling pressure is discharged while being controlled by the linear solenoid valve 103 through the second oil passage 104.

5. 发明专利

JPH11107797A CONTROLLER FOR POWER TRAIN 失效
公开(公告)号：JPH11107797A
公开(公告)日：1999-04-20
申请号：JP28473897
申请日：1997-09-30
申请人： MAZDA MOTOR
发明人： KAMATA SHINYA , NAGAYAMA SHIGERU , NOGUCHI NAOYUKI , SAWA KENJI
IPC分类号： B60W10/04 , B60W10/06 , B60W10/10 , B60W10/11 , F02D29/00 , F02D41/04 , F02D43/00 , F02P5/15 , F16H61/04 , F16H63/50 , B60K41/06
摘要： PROBLEM TO BE SOLVED: To prevent a response delay by determining whether a fuel supply condition is changed or not in a torque-down control execution time and advancing control starting and/or finishing timing as against that for a fuel supply condition unchanged time. SOLUTION: In torque-down control in an up-shift gear shift time, a target turbine revolution deviation is set on the basis of a revolution speed before gear shift and a target gear shift time. Then, in an ATCU 40, engine torque is computed on the basis of basis ignition timing and an engine torque characteristic, and on the basis of the engine torque and the target turbine revolution deviation, a torque-down demand quantity is computed. Subsequently, a torque- down is demanded in the ECU 30 when it is determined that an inertia phase is started. In this process, if torque-down control due to a change in a fuel supply condition is carried out, torque-down control starting and/or finishing timing is advanced as against that for a fuel supply condition unchanged time.

6. 发明专利

JPH08100856A HYDRAULIC CONTROL DEVICE FOR AUTOMATIC TRANSMISSION 失效
公开(公告)号：JPH08100856A
公开(公告)日：1996-04-16
申请号：JP23678394
申请日：1994-09-30
申请人： MAZDA MOTOR
发明人： SAWA KENJI , YAMAMOTO KOICHI , NAGAYAMA SHIGERU , NAKANO SHIN
IPC分类号： F16H61/06 , F16H61/08 , F16H61/10 , F16H61/686
摘要： PURPOSE: To provide a hydraulic control device for an automatic transmission capable of controlling a plurality of friction elements synchronized and capable of suppressing dispersing a rise up characteristic of oil pressure by a residual pressure when discharged a pressure. CONSTITUTION: In a hydraulic control device for an automatic transmission controlling connecting a plurality of frictional elements 18, 24 synchronized by a single hydraulic control means 77, an orifice 90 is provided in a common passage 111 in the upstream from an oil path branching so as to communicate with a pressure oil chamber of each frictional element.

7. 发明专利

JPH07119822A SPEED CHANGE CONTROL DEVICE FOR AUTOMATIC TRANSMISSION 失效
公开(公告)号：JPH07119822A
公开(公告)日：1995-05-12
申请号：JP29140793
申请日：1993-10-26
申请人： MAZDA MOTOR
发明人： KAMATA SHINYA , YOKOTA HIROAKI , NAGAYAMA SHIGERU , NAKAHARA YUJI , NAKANO SHIN , MARUSUE TOSHIHISA , MATSUMOTO HIROYUKI
IPC分类号： F16H61/06
摘要： PURPOSE:To provide smooth and prompt speed change operation at speed change when working pressure discharged from a friction element by expediting the discharge of the working pressure from an accumulator. CONSTITUTION:An accumulator 74 is provided in a working pressure supply oil passage to the tightening chamber 45b of a friction element 45 having the tightening chamber 45b and a releasing chamber 45c. Thus, in tightening the friction element 45 by the supply of the working pressure to the tightening chamber 45b, its tightening shock is relaxed. In predetermined speed change for discharging the working pressure from both the tightening chamber 45b and the releasing chamber 45c, the discharge of the working pressure from the releasing chamber 45c is promptly dome. Meanwhile, control means operates discharging pressure expediting means 73, 87 to expedite the discharge of the working pressure from the accumulator 74. Thus, the discharge of the working pressure from the tightening chamber 45b is also promptly done. Therefore, the generation of two-stage shock is avoided in speed change for tightening the friction element 45.

8. 发明专利

JPH0478370A SPEED CHANGE CONTROL DEVICE FOR AUTOMATIC TRANSMISSION 失效
公开(公告)号：JPH0478370A
公开(公告)日：1992-03-12
申请号：JP18995490
申请日：1990-07-18
申请人： MAZDA MOTOR
发明人： NAGAYAMA SHIGERU
IPC分类号： F16H61/10 , F16H59/24 , F16H59/48 , F16H59/74 , F16H61/04
摘要： PURPOSE:To prevent shock during speed change by correcting vehicle speed, changed to a low speed stage set in a speed change map, to the high speed side by the specified quantity when throttle opening is less than the specified value and the rate-of-change of vehicle speed is more than the specified value, thus performing speed change control. CONSTITUTION:Multistage speed change gear mechanism is automatically operated according to a speed change map preset on the basis of throttle opening information from a throttle opening detecting means for detecting throttle opening and vehicle speed information for a vehicle speed detecting means for detecting vehicle speed. A vehicle speed rate-of-change computing means is provided to compute the rate-of- change of vehicle speed from the vehicle speed information, and the vehicle speed changed to the low speed stage set in the speed change map is corrected to the high speed side by the specified quantity when the throttle opening is less than the specified value and the vehicle speed change-of-rate is more than the specified value, thus performing speed change control. The vehicle speed during speed change operation is thereby prevented from being lowered down below the creeping speed of the concerned speed change stage even with response delay by oil pressure between a speed change command and the actual execution of speed change, and thus shock during speed change is prevented.

9. 发明专利

JPH0328573A HYDRAULIC CIRCUIT FOR AUTOMATIC TRANSMISSION 失效
公开(公告)号：JPH0328573A
公开(公告)日：1991-02-06
申请号：JP16289889
申请日：1989-06-26
申请人： MAZDA MOTOR
发明人： KITADA MASAHITO , NAGAYAMA SHIGERU
IPC分类号： F16H63/04 , F16H59/02 , F16H59/70 , F16H61/02
摘要： PURPOSE:To reduce shifting shocks and improve the reliability of a coast clutch by connecting the coast clutch engagement pressure introduction circuit to a backup valve and producing a backup pressure at the time of introducing the engagement pressure. CONSTITUTION:A hydraulic pressure from an oil pump 28 is connected to a manual valve 64 and a pressure regulator valve 61 for bringing the pressure to a specified line pressure. The hydraulic pressure is further connected to the backup valve 93 via a line 151 and further to a coast clutch 17 via a line 101, its branch line 115, a one-way orifice 89, and a line 117. An engagement hydraulic pressure of a coast clutch 17 from a 3-4 shift valve 73 is connected to a control port of the backup valve 93 via a line 150 at the time a solenoid valve 78 is off. As a result, line pressure is increased only when the coast clutch 17 is engaged so that shifting shocks are reduced.

10. 发明专利

JPH10103497A CONTROLLER FOR AUTOMATIC TRANSMISSION 失效
公开(公告)号：JPH10103497A
公开(公告)日：1998-04-21
申请号：JP28000696
申请日：1996-09-30
申请人： MAZDA MOTOR
发明人： KAMATA SHINYA , NAGAYAMA SHIGERU , YAMANE HAJIME , SAWA KENJI
IPC分类号： F16H61/10 , F16H61/16
摘要： PROBLEM TO BE SOLVED: To improve accuracy of jumping-across shift control by shortening an intermediate step bypass time more than that of a jump across shift time of a back out up shift following with rapid deceleration of a throttle opening at the time of a jump across shift of a manual down shift following with an operation of a shift lever in a condition in which the throttle opening is fully closed. SOLUTION: A gear ratio of a shift gear mechanism is changed to nearly 3 speed, start of shift operation toward 2 speed is allowed at a time point tx when a 4-2 inhibiting flag is reset to O, and its shift operation is started at a reset time paint t2 in the case of re-shift inhibiting condition. In a manual 4-2 down shift jumping-across shift, a back time T1 is set for a comparatively long time, and every time points t2, tx are timely first more than a time point t3 when the T1 is made time up. It is thus possible to shorten the bypass time of 3 speed of an intermediate speed comparing with a 2-4 up shift speed changing time, speed change toward a target 2 speed is rapidly completed, and a driver utilizes an engine brake in an early stage.

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