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公开(公告)号：JP2002339754A
公开(公告)日：2002-11-27
申请号：JP2002130591
申请日：2002-05-02
Applicant: TOYOTA MOTOR CORP
Inventor： UMEHANA TOYOICHI , KOBAYASHI TATSUO , HATTORI FUMIAKI , HAJIMA TAKASHI , HOKUTOU HIROYUKI , KASHIWAKURA TOSHIMI , KANDA MUTSUMI , TANAKA KOHACHI , MATSUSHITA SOICHI , ABE SHIZUO , MURAMATSU NOBUYUKI
Abstract: PROBLEM TO BE SOLVED: To provide a cylinder injection type spark ignition internal combustion engine capable of surely expanding a stratified combustion area to a high load side by assuring a reliable ignitability. SOLUTION: This cylinder injection type spark ignition internal combustion engine comprises an ignition plug, a cavity 802 formed in the top face of a piston, and a fuel injection nozzle 7 injecting fuel into the cavity in generally rather thin fan shape. The cavity comprises side walls deflected so that fuel can generally pass near the ignition plug. A plurality of deflection guiding projected parts 22 deflecting fuel in lateral direction are provided in the cavity.
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公开(公告)号：JP2000027651A
公开(公告)日：2000-01-25
申请号：JP19331898
申请日：1998-07-08
Applicant: TOYOTA MOTOR CORP , TOYOTA CENTRAL RES & DEV
Inventor： HATTORI FUMIAKI , HOKUTOU HIROYUKI , KASHIWAKURA TOSHIMI , KANDA MUTSUMI , KOIKE MAKOTO , SUZUOKI TETSUNORI
Abstract: PROBLEM TO BE SOLVED: To provide a cylinder injection type spark ignition engine internal combustion engine which can enlarge the stratified combustion range on the high speed side. SOLUTION: A cylinder injection type spark ignition engine internal combustion engine includes a spark plug 6, a cavity formed in the top surface of a piston, and a fuel injection valve 7 for injecting fuel into the cavity in a relative thin sector-like form. A side wall 8b of the cavity, which faces the fuel injection valve 7 for guiding the fuel to a position in the vicinity of the spark plug 6 has a substantially symmetric horizontal arcuate shape with respect to a first vertical plane N1 which is distant from the center vertical plane Nc of the fuel, and which is substantially parallel with the plane Nc.
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公开(公告)号：JPH1136867A
公开(公告)日：1999-02-09
申请号：JP19023597
申请日：1997-07-15
Applicant: TOYOTA MOTOR CORP
Inventor： TOMOTA AKITOSHI , KANDA MUTSUMI , KASHIWAKURA TOSHIMI , HATTORI FUMIAKI , HOKUTOU HIROYUKI
Abstract: PROBLEM TO BE SOLVED: To sufficiently reduce fuel consumption by enlarging a stratified combustive area, by increasing air intake by an intake increasing means when the necessary fuel amount determined on the basis of at least the engine operating condition exceeds a specific amount, for the stratified combustion which realizes the leans burn with low fuel consumption. SOLUTION: When an amount of fuel injection from a fuel injection valve 1e is smaller than a specific amount, the injected fuel is completely vaporized, and an air-fuel mixture of high ignitability, comprising the vaporized fuel and the intake, is formed near an ignition plug 1a at an ignition time, whereby the stratified combustion of low fuel consumption is performed. But when the fuel injection amount exceed the specific amount, the air intake amount per unit fuel is reduced, and the injected fuel can not get sufficient heat from the intake, so that the supercharging is executed by a turbocharger 4 to increase the intake amount corresponding to an amount exceeding the specific amount. Whereby the intake amount per unit fuel can be kept in the same condition as the time when the fuel injection amount is equal to the specific amount, and the injected fuel can be vaporized in a short time.
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公开(公告)号：JPH07253032A
公开(公告)日：1995-10-03
申请号：JP4417894
申请日：1994-03-15
Applicant: TOYOTA MOTOR CORP
Inventor： YOSHIOKA MAMORU , OBATA HARUMASA , TAGAMI TAKESHI , IWASHITA YOSHIHIRO , KASHIWAKURA TOSHIMI , SUZUKI MAKOTO , ICHINOSE HIROKI , OKAMIZU HIRONORI
Abstract: PURPOSE:To prevent deterioration of accelerating capability, caused by limiting of the operating speed of a variable valve timing device. CONSTITUTION:The valve timing of an intake valve is controlled by changing the rotational phase of a cam shaft 1 by a variable valve timing device 10. A control circuit 30 sets the valve timing according to the engine speed and respective driving conditions of a load, etc. Moreover, when the valve timing is set, the control circuit 30 sets the valve timing under respective driving conditions within the specific deviation from the optimum valve timing in full loading in the engine speed.
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公开(公告)号：JPH06213020A
公开(公告)日：1994-08-02
申请号：JP862593
申请日：1993-01-21
Applicant: TOYOTA MOTOR CORP
Inventor： KASHIWAKURA TOSHIMI , IWASHITA YOSHIHIRO
Abstract: PURPOSE:To restrict hunting phenomenon caused at the time of a high load and waviness of a torque in the case where a valve timing is controlled continuously on the basis of the engine rotating speed and the intake air amount of an internal combustion engine. CONSTITUTION:A variable valve timing mechanism 23 consists of a timing pulley 24 and a step motor 25, the opening/closing timing of an intake valve 9 is varied continuously. In a VVTECU 41, at the time of a high load such that a throttle opening degree attains 50%, calculation of a function f (NE, TA) serving values of an engine rotating speed and a throttle opening degree as a parameter is carried out on the basis of the engine rotating speed and the throttle opening degree, and the calculating result is set as a target step number of controlling the opening/closing timing of an intake valve 9. In the VVTECU 41, the variable valve timing mechanism 23 is controlled on the basis of the target step number.
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Patent Agency Ranking
公开(公告)号：JPH05118232A
公开(公告)日：1993-05-14
申请号：JP28003191
申请日：1991-10-25
Applicant: TOYOTA MOTOR CORP
Inventor： GOTO MASAHITO , IWASHITA YOSHIHIRO , KASHIWAKURA TOSHIMI
Abstract: PURPOSE:To always intend compatibility of improvement on fuel consumption with reduction of NOx without performing external reflux of exhaust gas. CONSTITUTION:An inlet side variable valve timing mechanism (an inlet side VVT) 23 and an exhaust side VVT 26 are respectively provided on respective camshafts 21, 22 in the inlet side and the exhaust side, and open and close timings of an inlet valve 9 and an exhaust valve 10 are made variable. A VVTECU 41 uses drive timing of the inlet side VVT 23 preset so as to be the latest in close timing of the inlet valve 9 in respective load ranges among combinations of both drive timings of the inlet side VVT 23 and the exhaust side VVT 26 for obtaining the most suiable target exhaust gas residual ratio in a combustion chamber 6 in accordance with load change, based on throttle opening and engine revolution speed input from respective sensors 14, 32 through an engine ECU 40. It is possible thereby to keep residual exhaust gas ratio in the most suitable level without depending on load change of an engine 1, in addition, to reduce pumping loss over the whole range of partial load.
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公开(公告)号：JPH05106411A
公开(公告)日：1993-04-27
申请号：JP26507991
申请日：1991-10-14
Applicant: TOYOTA MOTOR CORP
Inventor： MORI TAIICHI , IWASHITA YOSHIHIRO , KASHIWAKURA TOSHIMI , GOTO MASAHITO
Abstract: PURPOSE:To ensure the property of an engine to be nicely loaded on a vehicle, and mount a variable valve timing device(VVT) easily. CONSTITUTION:Driving gears 19, 20 are provided on rear end sides of exhaust side cam shafts 7, 11 rotated in association with rotation of a crank shaft 2, and also driven gears 21, 22 are provided on rear end sides of intake side cam shafts 6, 10 so as to engage with the driving gears 19, 20. VVTs 23, 24 are incorporated in the driven gears 21, 22 integratedly. It is thus possible to avoid interference between a timing belt 18 provided on the front end side of an engine 1, and the VVTs 23, 24 provided on the rear end of the engne 1, so that the VVTs 23, 24, the timing belt 18, and the like are no more projected forward from the engine 1. Since a comparatively relaxing space is provided on the rear end side of the engine 1, mounting of the VVTs 23, 24 may be hardly disturbed.
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公开(公告)号：JPH0599007A
公开(公告)日：1993-04-20
申请号：JP26409991
申请日：1991-10-11
Applicant: TOYOTA MOTOR CORP
Inventor： GOTO MASAHITO , IWASHITA YOSHIHIRO , KASHIWAKURA TOSHIMI
Abstract: PURPOSE:To reduce useless oil consumption by preventing excessive lowering of an intake pressure at the time of totally-closing of a throttle, and suppressing oil rising which may caused by the intake pressure lowering. CONSTITUTION:A variable valve timing control device is provided with a variable valve timing mechanism which adjusts a closing timing of a intake valve 9, various kinds of sensors 31 to 34, and an electronic control device (ECU) 48 which controls the variable valve timing mechanism based on detection signals of the sensors 31 to 34. The ECU 48 is operated such that a closing timing is set according to the operation condition when a throttle valve 25 is not totally closed, and the closing timing is set to be slower than the timing according to the operation condition when the throttle valve 25 is totally closed. The ECU 48 advances the closing timing of an intake valve 9 once delayed, when the throttle valve 25 is totally closed and an intake pressure is lower than a preset value, such that the low intake pressure should be the preset value.
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公开(公告)号：JPH04303153A
公开(公告)日：1992-10-27
申请号：JP6695091
申请日：1991-03-29
Applicant: TOYOTA MOTOR CORP
Inventor： KASHIWAKURA TOSHIMI
Abstract: PURPOSE:To reduce shock of a speed change of a transmission over the whole ranges of an engine load preferably. CONSTITUTION:A variable valve timing device (VVT) is composed of a timing pulley assembly 23 and a step motor 24. An ignition plug 26 is provided at a combustion chamber 6. A delay angle control is performed for an opening timing of an intake valve 9 by the VVT to reduce an engine output torque in changing a speed by an automatic transmission 44 for a large load range of an engine 1. In the meanwhile, for a small load range, a delay angle control is performed for an ignition timing of an ignition pluge 26 to reduce the engine output torque in changing a speed of the automatic transmission 44. A speed changed shock by the transmission can thus be reduced over the whole ranges from the large load range to the small load range can thus be reduced without being followed by defects such as lack of an output torque change by a valve timing control only, or an increase of an exhaust temperature by an ignition timing control only.
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公开(公告)号：JPH04164109A
公开(公告)日：1992-06-09
申请号：JP29019490
申请日：1990-10-26
Applicant: TOYOTA MOTOR CORP
Inventor： IWASHITA YOSHIHIRO , KASHIWAKURA TOSHIMI
Abstract: PURPOSE:To downsize the outer diameter and to provide the required brake torque to a drum gear and operate it by providing a braking means which is used to give brake torque to the drum gear outside the ring gear with a cam shaft as a center. CONSTITUTION:A ring gear 13 is interposed between a timing pulley 7 and a cam shaft 1, and the timing pulley 7 and the cam shaft 1 are connected. An annular magnet 27 as a braking means is contained peripherally inside a brake plate 25. This magnet 27 is arranged at the position outside the ring gear 13 with the cam shaft 1 as a center. This arrangement allows the outer diameter of the whole device with the cam shaft 1 as a center to be downsized, resulting in improvement of mountability of the device itself onto the engine. A relatively small braking force generated by the magnet 27 can give the drum gear 20 the brake torque to resist the rotational force of the ring gear 13, leading to reduction of the power losses.
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