公开(公告)号：JPS59113249A

公开(公告)日：1984-06-29

申请号：JP22208382

申请日：1982-12-20

Applicant: Aisan Ind Co Ltd ,  Toyota Motor Corp

Inventor： ITOU TAKAAKI ,  KATOU TAKASHI ,  MORINO TOSHIHARU

IPC: F02M7/17

CPC classification number: F02M7/17

Abstract: PURPOSE:To enable to move a suction piston smoothly and with high response, by fitting a bearing to a suction piston shaft of a variable venturi carburetor. CONSTITUTION:A bearing 13 is inserted into an annular space 12 formed between a suction piston shaft 9 and a support sleeve 10. The bearing 13 consists of a hollow cylindrical sleeve 14, and a plurality of ball inserting holes 15 are formed in the outer peripheral surface of the sleeve 14 at its opposite end parts in the manner that they are spaced equiangularly from each other. Further, if a plurality of communicating grooves 19 are formed in the outer surface of the sleeve 14 to extend in the axial direction of the sleeve 14, air in a vacuum chamber 28 is enabled to flow freely into an internal chamber 38, so that negative pressure in the internal chamber 38 is made equal to that in the vacuum chamber 28. Therefore, the bearing 13 can be always held at the central part between snap rings 20 and 21, so that a suction piston 3 can be moved smoothly.

Abstract translation: 目的：通过将轴承安装到可变文丘里化油器的吸入活塞轴上，能够使吸入活塞平稳，高响应地移动。 构成：将轴承13插入到形成在吸入活塞轴9和支撑套筒10之间的环形空间12中。轴承13由中空圆柱形套筒14组成，多个球形插入孔15形成在外周 套筒14的相对端部的表面以它们彼此等角地间隔开的方式。 此外，如果在套管14的外表面上形成多个连通槽19以在套筒14的轴向方向上延伸，则真空室28中的空气能够自由地流入内部室38，使得负 使内室38内的压力与真空室28相同。因此，轴承13可以始终保持在卡环20和21之间的中心部分，从而能够平稳地移动吸入活塞3。

公开(公告)号：JPS59101527A

公开(公告)日：1984-06-12

申请号：JP20925282

申请日：1982-12-01

Applicant: Toyota Motor Corp

Inventor： KATOU TAKASHI ,  ITOU TAKAAKI

IPC: F01N3/22

CPC classification number: F01N3/222 ,  F01N3/22 ,  F01N3/227

Abstract: PURPOSE:To improve purging of a large amount of unburnt HC, CO produced without using an expensive device even if fuel-air mixture is brought to an excessive rich state, by a method wherein the air-fuel ratio of the fuel-air mixture is maintained at a specified value, and a temperature sensitive switch is provided. CONSTITUTION:Secondary air is intermittently fed in an exhaust manifold 3 at the 1-2HZ frequency of a pulse generator 71 from a secondary air feed control valve 50. Since fuel-air mixture, produced in a carbretter 2, is normally maintained at a specified value, the air-fuel ratio is varied at the 1-2HZ frequency within a range of from + or -0.2 to + or -1.0 based on an approximately theoretical air-fuel ratio. Besides, the mean value is maintained within a window W0, and thereby a high purging efficiency may be obtained through utilization of the oxygen holding function of a ternary monolith catalyst 5. When an engine body or the carbretter 2 is increased in temperature, a temperature-sensitive switch 72 is turned ON, secondary air continues to be fed, and this improves purging of a large amount of unburnt HC, CO produced.

Abstract translation: 目的：为了改善大量未燃烧的HC的清洗，即使燃料 - 空气混合物处于过度富含状态，CO也不使用昂贵的装置而生产，燃料 - 空气混合物的空燃比为 保持在指定值，并且提供温度敏感开关。 构成：二次空气以二次空气供给控制阀50间歇地送入脉冲发生器71的1-2HZ频率的排气歧管3.由于在碳纤维收集器2中产生的燃料 - 空气混合物通常保持在规定的 基于大致理论空燃比，空燃比在+2〜+0.0的范围内以1-2HZ的频率变化。 此外，平均值保持在窗口W0内，从而通过利用三元整体式催化剂5的氧气保持功能可以获得高净化效率。当发动机主体或碳纤维收缩器2的温度升高时，温度 敏感开关72接通，继续供给二次空气，这改善了大量产生的未燃HC，CO的清洗。

公开(公告)号：JPS5934463A

公开(公告)日：1984-02-24

申请号：JP14480582

申请日：1982-08-23

Applicant: Toyota Motor Corp

Inventor： KATOU TAKASHI ,  ITOU TAKAAKI

IPC: F02M7/24 ,  F02M7/17

CPC classification number: F02M7/17

Abstract: PURPOSE:To secure a high purification efficiency in the transient operation of an engine, by changing to a larger second value the amplitude of a drive signal for a solenoid valve for opening and closing an air bleed passage, in the transient operation. CONSTITUTION:When the negative pressure in an intake manifold 1 has sharply changed, namely, transient operation is performed, the movable contact 68 of a transient operation detector 60 comes into touch with one of fixed contacts 69, 70 to apply a voltage to turn off a first analogue switch 53 and turn on a second analogue switch 54. As a result, a saw-toothed voltage of larger amplitude is applied to a voltage-current converter 55 to increase the change width of the cross-sectional area of the opening of a valve port 37 to enlarge the fluctuation width of the air-fuel ratio of a mixture. Although the reference air fuel ratio of the mixture slightly differs from a theoretical air-fuel ratio due to the instantaneous evaporation of fuel clinging to the inside surface of the intake manifold 1 or due to the like in the transient operation, a high purification efficiency is attained by the enlargement of the fluctuation width of the air- fuel ratio.

Abstract translation: 目的：为了在发动机的瞬态操作中确保高净化效率，在瞬时操作中，通过改变用于打开和关闭排气通道的电磁阀的驱动信号的较大值。 构成：当进气歧管1中的负压急剧变化时，即进行瞬时动作时，瞬时动作检测器60的可动触点68与固定触点69,70中的一个接触以施加电压以关闭 第一模拟开关53并接通第二模拟开关54.结果，将较大振幅的锯齿电压施加到电压 - 电流转换器55，以增加开路的横截面积的变化宽度 阀口37，以扩大混合物的空燃比的变动幅度。 尽管混合物的参考空燃比由于燃料附着在进气歧管1的内表面上的瞬间蒸发或由于瞬时作用等原因而与理论空燃比略有不同，但是净化效率高 通过扩大空燃比的波动宽度来实现。

公开(公告)号：JPS5934457A

公开(公告)日：1984-02-24

申请号：JP14398982

申请日：1982-08-21

Applicant: Toyota Motor Corp

Inventor： KATOU TAKASHI ,  ITOU TAKAAKI

IPC: F02M7/24 ,  F02M7/17

CPC classification number: F02M7/17

Abstract: PURPOSE:To enable stable idling, by detecting the idling state of an engine to change to a smaller second value the amplitude of a drive signal for a solenoid valve for opening and closing an air bleed passage, to decrease the fluctuation width of the air fuel ratio of the engine. CONSTITUTION:When a throttle valve 11 is in the idling position, namely, when an engine is being decelerated, a throttle switch 58 and a first analogue switch 53 are turned on and a second analogue switch 54 is turned off so that a saw- tooth voltage of smaller amplitude is applied to a voltage-current converter 55. As a result, the change width of the cross-sectional area of the opening of a valve port 37 is reduced to decrease the fluctuation width of the air fuel ratio of the engine to diminish the fluctuation of its output torque. Stable idling is thus enabled.

Abstract translation: 目的：为了实现稳定的空转，通过检测发动机的怠速状态，将较小的第二值变更为用于打开和关闭排气通道的电磁阀的驱动信号的幅度，以减小空气燃料的波动宽度 发动机的比例。 构成：当节气门11处于怠速位置时，即当发动机减速时，节气门开关58和第一模拟开关53接通，第二模拟开关54断开，锯齿 电压 - 电流转换器55施加较小幅度的电压。结果，阀口37的开口的截面积的变化宽度减小，以减小发动机的空燃比的变动幅度 以减少其输出扭矩的波动。 因此启用稳定的空转。

公开(公告)号：JPS5765843A

公开(公告)日：1982-04-21

申请号：JP13933380

申请日：1980-10-07

Applicant: Toyota Motor Corp

Inventor： NAKAMURA NORIHIKO ,  KATOU TAKASHI

IPC: F02M19/04 ,  F02M7/16 ,  F02M7/17

Abstract: PURPOSE: To prevent eccentric wear of a needle due to vibraion by eliminating a contact between a needle and a jet of a variable venturi carburetter within the operational range of high suction air volume.
CONSTITUTION: A piston 1 engaged with a metering needle 3 on the end of the piston, is installed inside a suction chamber 14 of a carburetter 10, making a sliding motion in proportion to the negative pressure of a venturi member 13. The needle 3 normally brought into constant with a part of a jet by a projection 24 installed on a holder 4', makes a sliding motion. A needle holder 17 is concentrically formed in a rod guide 15 provided inside the suction chamber 14, while a guide 16 is bored on the end of the needle holder 17. In the operational range of low air volume for an engine, the needle 3 is positioned as illustrated, making a contact with the jet 7 while the other end of the needle 3 is inserted into the guide 16 and the contact between the needle 3 and the jet 7 disappears in the operational region of high air volume.
COPYRIGHT: (C)1982,JPO&Japio

Abstract translation: 目的：通过在高吸风量的工作范围内消除针头和可变文丘里化油器的射流之间的接触，防止由于振动引起的针头的偏心磨损。 构成：与活塞端部的计量针3接合的活塞1安装在化油器10的吸入室14的内部，与文丘里管构件13的负压成比例地滑动。针3正常 通过安装在保持器4'上的突起24与一部分射流一起使其成为一个滑动。 针保持器17同心地形成在设置在吸入室14内部的杆引导件15中，而引导件16在针保持器17的端部钻孔。在发动机的低风量的操作范围内，针3是 如图所示定位，与针7接触，而针3的另一端插入引导件16中，并且针3和射流7之间的接触在高风量的操作区域中消失。

公开(公告)号：JPS5765842A

公开(公告)日：1982-04-21

申请号：JP13933280

申请日：1980-10-07

Applicant: Toyota Motor Corp

Inventor： NAKAMURA NORIHIKO ,  KATOU TAKASHI

IPC: F02M7/17 ,  F02M7/24 ,  F02M19/04

CPC classification number: F02M19/04 ,  F02M7/17 ,  Y10S251/903 ,  Y10S261/38

Abstract: PURPOSE: To properly control an air bleed hole provided in a jet and reduce wear out of needle by contacting the needle of a variable venturi carburetter to the jet within the region of low suction air volume and by loosely fitting them within the region of high air volume.
CONSTITUTION: A piston 1 is installed inside a suction chamber 14 of a carburetter 10. The end of the piston 1 is connected to a metering neddle 5. The piston 1 makes a sliding motion inside the chamber 14 in proportion to the negative pressure in a venturi member 6. The needle 5 makes a sliding motion, partially in contact with a jet 8 by a projection 22 inside a holder 3', and adjusts an air bleed hole 34 bored in the jet 8. At expansion member 27 is fastened to the end of the needle 8, and moves inside a large-sized member 31 and a small-sized member 30 of a well 26. As the expansion member 27 contacts the small-sized member 30 within the region of high air volume, the needle 5 and the jet 8 are loosely fitted, thereby increasing the opening area of the bleed hole 34.
COPYRIGHT: (C)1982,JPO&Japio

Abstract translation: 目的：为了适当地控制喷射中设置的排气孔，通过将可变文丘里化油器的针与低吸入空气量的区域内的喷嘴接触，并将其松散地安装在高空气区域内，从而减少针头的磨损 卷。 构成：将活塞1安装在化油器10的吸入室14的内部。活塞1的端部连接到计量阀5。活塞1在室14内与负压成比例地进行滑动运动 针5通过支架3'内的突起22进行滑动，与喷嘴8部分接触，并且调节在喷嘴8中钻孔的排气孔34.在膨胀构件27被固定到 针8的端部，并且在孔26的大尺寸构件31和小尺寸构件30内移动。随着膨胀构件27在高风量区域内接触小尺寸构件30，针5 并且喷射器8松散地配合，从而增加了排放孔34的开口面积。

公开(公告)号：JPS59113247A

公开(公告)日：1984-06-29

申请号：JP22208182

申请日：1982-12-20

Applicant: Aisan Ind Co Ltd ,  Toyota Motor Corp

Inventor： ITOU TAKAAKI ,  KATOU TAKASHI ,  MORINO TOSHIHARU

IPC: F02M7/17

CPC classification number: F02M7/17

Abstract: PURPOSE:To fit a bearing easily to a suction piston shaft of a variable venturi carburetor. CONSTITUTION:A bearing 13 is inserted into an annular space 12 formed between a suction piston shaft 9 and a support shaft 10. The bearing 13 consists of a hollow cylindrical sleeve 14 made of a synthetic resin, and a plurality of ball inserting holes 15 are formed in the outer peripheral surface of the sleeve 14 on both end parts of the same, in the manner that they are spaced equiangularly from each other. When balls 16 are inserted into respective holes 15, they are held securely in the holes 15 by the elastic force of the sleeve 14, without causing coming-out of the balls 16 from the holes 15. Therefore, the bearing 13 can be fitted easily to the suction piston shaft 9.

Abstract translation: 目的：将轴承轻松安装到可变文丘里化油器的吸入活塞轴上。 构成：将轴承13插入到形成在吸入活塞轴9和支撑轴10之间的环形空间12中。轴承13由合成树脂制成的中空圆柱形套筒14和多个球插入孔15 形成在套筒14的两个端部的外周面上，使得它们彼此等角度地间隔开。 当球16插入相应的孔15中时，它们通过套筒14的弹力牢固地保持在孔15中，而不会使球16从孔15中排出。因此，轴承13可以容易地安装 到吸入活塞轴9。

公开(公告)号：JPS59110851A

公开(公告)日：1984-06-26

申请号：JP21917682

申请日：1982-12-16

Applicant: Aisan Ind Co Ltd ,  Toyota Motor Corp

Inventor： KATOU TAKASHI ,  ITOU TAKAAKI ,  TAMURA YOSHIO ,  MORINO TOSHIHARU

IPC: F02M7/17

CPC classification number: F02M7/17

Abstract: PURPOSE:To prevent change in the air-to-fuel ratio because of intermittent increase of the rate of fuel supply by furnishing a guide wall at the foot of a needle, guiding thereby the fuel creeping on this needle, and thereby preventing formation of liquid drops at the foot of the needle. CONSTITUTION:The body 1 of this carburettor is composed of a suction piston 3 moving in suction passage 2, a needle 4 mounted at the tip of this piston 3, a fuel passage 20 into which the needle 4 can intrude, and a gauge jet 21 installed in this fuel passage 20 to work in cooperation with the needle 4. At the foot of this needle 4, a guide wall 26 is formed stretching from the wall surface of understream of needle 4 smoothly to the foremost surface of the piston 3. Thereby the fuel flowing on the underwall surface of the needle 4 is guided by this guide wall 26 to let it flow continuously onto the foremost surface of the piston 3 stably. Thus formation of liquid drops at the foot of the needle 4 is prevented.

Abstract translation: 目的：为了防止由于在针脚上提供引导壁而引起燃料供应的间歇性增加，空气燃料比变化，从而导致该针上的燃料蠕变，从而防止液体形成 滴在针脚下。 构成：该化油器的主体1由在吸入通路2中移动的吸入活塞3，安装在该活塞3的前端的针4，针4能够侵入的燃料通路20以及计量喷嘴21 安装在该燃料通道20中以与针4协同工作。在该针4的脚部处，形成从针4的下端面平滑地延伸到活塞3的最前表面的引导壁26。 在针4的底壁表面流动的燃料被该引导壁26引导，使其稳定地流动到活塞3的最前表面。 从而防止在针4的​​脚处形成液滴。

公开(公告)号：JPS5934462A

公开(公告)日：1984-02-24

申请号：JP14480482

申请日：1982-08-23

Applicant: Toyota Motor Corp

Inventor： KATOU TAKASHI ,  ITOU TAKAAKI

IPC: F02M7/24 ,  F02M7/17

CPC classification number: F02M7/17

Abstract: PURPOSE:To improve the specific fuel consumption, by fully opening a solenoid valve in an air bleed passage a prescribed lag time after the starting of deceleration. CONSTITUTION:When a throttle valve 11 is in the idling position and the rotational frequency of an engine is higher than 2,000 r.p.m., namely, when the engine is being decelerated, the output voltage of an AND gate 56 is made high. For that reason, the output voltage of a delay circuit 57 is made high after a prescribed lag time to turn off a first analogue switch 53 and turn on a second analogue switch 54 to apply a constant voltage to a voltage-current converter 55. As a result, a valve port 37 in an air bleed passage 35 is entirely opened to supply a thin mixture into the cylinder of the engine. Although the air-fuel ratio of the engine keeps fluctuating at the temporary closure of the throttle valve 11, the thin mixture is supplied into the engine cylinder in the deceleration with the valve closed long. For that reason, the specific fuel consumption is improved, and good acceleration is enabled after gear shifting.

Abstract translation: 目的：为了提高燃油消耗，通过在减速开始后将规定的滞后时间全部打开排气通道中的电磁阀。 构成：当节气门11处于怠速位置并且发动机的转速高于2000r.p.m.即当发动机正在减速时，与门56的输出电压变高。 为此，延迟电路57的输出电压在规定的滞后时间之后变高，以关闭第一模拟开关53并接通第二模拟开关54，以向电压 - 电流转换器55施加恒定电压。 结果，排气通道35中的阀口37完全打开，以将薄混合物供应到发动机气缸中。 尽管发动机的空燃比在节流阀11的临时关闭时保持不变，但是当阀关闭很长时，薄混合物以减速度供给到发动机气缸。 因此，改变了具体的燃料消耗，并且在变速后能够实现良好的加速。

公开(公告)号：JPS5934461A

公开(公告)日：1984-02-24

申请号：JP14480382

申请日：1982-08-23

Applicant: Toyota Motor Corp

Inventor： KATOU TAKASHI ,  ITOU TAKAAKI

IPC: F02M7/24 ,  F02M7/17

CPC classification number: F02M7/17

Abstract: PURPOSE:To improve the specific fuel consumption of an engine, by detecting the deceleration of the engine through a deceleration sensor to entirely open a solenoid valve in an air bleed passage during the deceleration to reduce fuel supplied to the engine. CONSTITUTION:When a throttle valve 11 is in the idling position and the rotational frequency of an engine is higher than 2,000 r.p.m., namely, when the engine is being decelerated, an idling switch 58 and a rotational frequency switch 59 are both turned on and the output voltage of an AND gate 56 is made high to turn off a first analogue switch 53 and turn on a second analogue switch 54 to apply a constant voltage to a voltage-current converter 55 so that a solenoid 43 continues to act to keep fully open a valve port 37 in an air bleed passage 35. Fuel supplied from a nozzle 28 is thus decreased in the deceleration of the engine to improve its fuel efficiency.

Abstract translation: 目的：通过减速传感器检测发动机的减速度，在减速期间全部打开排气通路中的电磁阀，以减少供给发动机的燃料，来提高发动机的燃料消耗。 构成：当节气门11处于怠速位置并且发动机的转速高于2000rpm时，即当发动机正在减速时，怠速开关58和转速开关59都被接通， 使与门56的输出电压变高以关闭第一模拟开关53并接通第二模拟开关54以向电压 - 电流转换器55施加恒定电压，使得螺线管43继续作用以保持完全打开 在排气通道35中的阀口37.因此，从喷嘴28供应的燃料在发动机的减速中减小，以提高其燃料效率。