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公开(公告)号：JP2001152856A
公开(公告)日：2001-06-05
申请号：JP33453599
申请日：1999-11-25
Applicant: TOYOTA MOTOR CORP
Inventor： UMEHANA TOYOICHI
IPC: F01N5/02 , F02B17/00 , F02B23/10 , F02D9/02 , F02F1/24 , F02F3/26 , F02M31/04 , F02M31/08 , F02M35/10
Abstract: PROBLEM TO BE SOLVED: To implement satisfactory stratified charge combustion for each fuel injection amount by heating intake air, in a cylinder injection of fuel type spark ignition internal combustion engine for carrying out at least the stratified charge combustion. SOLUTION: An engine intake system 11 comprises a first suction path 16 in which the heating of the intake air is not carried out, a second suction path 17 in which the heating of the intake air is carried out by heat transmission from an engine exhaust system, a ratio varying device for varying a ratio of a first intake amount introduced into a cylinder through the first suction path to a second intake amount introduced into the cylinder through the second suction path. The ratio varying device is controlled to implement the optimal intake air temperature in the cylinder, depending on the fuel injection amount.
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公开(公告)号：JPH10299495A
公开(公告)日：1998-11-10
申请号：JP10610197
申请日：1997-04-23
Applicant: TOYOTA MOTOR CORP
Inventor： KIYOMIYA SHINSUKE , UMEHANA TOYOICHI , KOBAYASHI TATSUO
Abstract: PROBLEM TO BE SOLVED: To generate the sufficient magnitude of a vertical swirl flow in a cylinder without decreasing an amount of intake air flowing in a cylinder. SOLUTION: A recessed part 8 is formed in the inner wall surface of an intake port on the exhaust valve side situated downstream from an intake port 5 and a protrusion part 6 is formed on the inner wall surface of the intake port on the exhaust valve side situated downstream from the recessed part 8. Namely, the sectional area of the intake port in the position of the recessed part 8 is increased to a value higher than the sectional area of the intake port situated upper stream from the intake port 5. With this state, by relatively protruding from the inner wall surface of the intake port of an exhaust valve in the position of the protrusion part 6, the decrease of an amount of intake air flowing in the cylinder is prevented from occurring. Further, drift is generated at intake air in the intake port 5, the intake air is caused to flow in a cylinder through the opening of an intake valve 2a on the opposite side to the exhaust valve 2b and a sufficiently high vertical swirl flow is generated in the cylinder.
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公开(公告)号：JPH10217806A
公开(公告)日：1998-08-18
申请号：JP2036297
申请日：1997-02-03
Applicant: TOYOTA MOTOR CORP
Inventor： UMEHANA TOYOICHI , IWAHASHI KAZUHIRO
Abstract: PROBLEM TO BE SOLVED: To prevent a shock in a return to a whole cylinder operation by performing a cylinder reducing operation in a speed reduction operation time, determining a downshift based on an idling action of a one-way clutch, and performing a return to the whole cylinder operation when the downshift is carried out. SOLUTION: In a speed reducing inertial operation time, a fuel cut is carried out in all the cylinders, however, a fuel cut in the whole cylinders is stopped at a comparatively high vehicle speed, and a shift to a cylinder reducing operation is carried out, and then, a return to the whole cylinder operation is carried out at further lower vehicle speed. This return is carried out when a switch from the second speed range to the first speed range is carried out during a speed reducing insertial drive in a D range. That is, it is determined at first whether the inertia drive is carried out or not by means of an accelerator opening sensor 102, for example, and a shift to a partial cylinder operation is carried out. In this process, on the basis of a downshift signal to the first speed range, values of the accelerator opening sensor 102 and the vehicle speed sensor 242 are stored in a ROM 304 for transmission control. Then, a command for the whole cylinder operation is given after the predetermined time from output of the downshift signal. In this way, a shock accompanying a return to the whole cylinder operation can be avoided.
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公开(公告)号：JPH0783082A
公开(公告)日：1995-03-28
申请号：JP23029693
申请日：1993-09-16
Applicant: TOYOTA MOTOR CORP
Inventor： YAMANAKA AKIHIRO , NOMURA KENICHI , SHINDO KENICHIRO , UMEHANA TOYOICHI , ASADA TOSHIAKI
Abstract: PURPOSE:To make a shock at the time of changing-over insensible for a driver by changing working cylinders simultaneously with speed changing of an automatic transmission in the case of changing the fuel injection pattern to change the working cylinders without varying the number of the working cylinders. CONSTITUTION:An engine main body 1 has a large number of cylinders respectively provided on plural cylinder banks 1A, 1B. An intake port of each of the cylinders is respectively installed on a common intake pipe 4 through each intake branch pipe 3, and a fuel injection valve 3a is provided on each of them. At least each of the fuel injection valves 3a is respectively controlled by an ECU 30 in accordance with a driving state of the engine main body 1. That is, the number of working cylinders is controlled in accordance with the driving state, and simultaneously, a fuel injection pattern is changed over to change over the working cylinders without varying the number of the working cylinders. In this case, the ECU 30 simultaneously changes over motions of the working cylinders at the time of judging that speed changing of an automatic transmission is to be carried out.
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公开(公告)号：JPH05340252A
公开(公告)日：1993-12-21
申请号：JP14599492
申请日：1992-06-05
Applicant: TOYOTA MOTOR CORP
Inventor： UMEHANA TOYOICHI , FUKUYAMA TADASHI , SATO TAKESHI , NAKAE KOICHI
Abstract: PURPOSE:To scavenge the whole space inside a combustion chamber in a two-cycle engine. CONSTITUTION:Three exhaust valves 9, 10, 11 are arranged on one side of the inner wall face 3a of a cylinder head, and two intake valves 12, 13 are arranged on the other side of the inner face 3a of the cylinder head. Additionally, one intake valve 14 is arranged in the central area of the inner wall face 3a of the cylinder head. Openings of the respective intake valves 12, 13, 14 formed on the exhaust valves 9, 10, 11 side are covered by mask walls 16, 19, 22. The valve opening timing of the intake valve 14 is delayed the valve opening timings of the intake valves 12, 13. The peripheral part of the combustion chamber is scavenged by the fresh air which flows in from the intake valves 12, 13, and the central are of the combustion chamber is scavenged by the fresh air which flows in from the intake valve 14.
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Patent Agency Ranking
公开(公告)号：JPH05133227A
公开(公告)日：1993-05-28
申请号：JP29274091
申请日：1991-11-08
Applicant: TOYOTA MOTOR CORP
Inventor： UMEHANA TOYOICHI , NAKAMURA NORIHIKO , FUKUYAMA TADASHI , SATO TAKESHI , NAKAE KOICHI
IPC: F01L1/38 , F02B1/04 , F02B3/06 , F02B19/08 , F02B23/00 , F02B25/14 , F02B25/26 , F02B75/02 , F02F1/24 , F02F1/42
Abstract: PURPOSE:To satisfactorily scavenge the whole interior of a combustion chamber by providing an additional air supply valve at the central part of the inside wall of a cylinder head, and supplying new air toward the central part of the interior of the combustion chamber from the additional air supply valve. CONSTITUTION:Three exhaust valves 9-11 are provided at the peripheral part on one side of the inside wall surface 3a of a cylinder heat. Two air intake valves 12, 13 are provided at the peripheral part on the other side of the inside wall 3a of a cylinder. Further, an additional air intake valve 14 is provided at the central part of the inside wall surface 3a of the cylinder heat, and exhaust valves 9, 10 are symmetrically provided with respect to a symmetrical plane K-K including the axial line of the cylinder. Air supply valves 12, 13 are also symmetrically provided with respect to the symmetrical plane K-K. And, the nozzle hole 6 of a subsidiary chamber is provided at the peripheral part of the inside wall surface 3a of the cylinder heat surrounded by three air intake valves 12-14, and further, the exhaust valve 11, the air intake valve 14 and the nozzle hole 6 are provided on the symmetrical plane K-K, thereby burnt gas that exists at the central part of a combustion chamber is scavenged by new air supplied from the additional air intake valve 14.
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公开(公告)号：JPH04116223A
公开(公告)日：1992-04-16
申请号：JP23456390
申请日：1990-09-06
Applicant: TOYOTA MOTOR CORP
Inventor： FUKUYAMA TADASHI , KAWAGOE MICHIO , SATO TAKESHI , UMEHANA TOYOICHI , NAKAE KOICHI
Abstract: PURPOSE:To increase an amount of fresh air supplied to a sub-chamber by opening an injection port of the sub-chamber in the vicinity of a cylinder head inner wall surface, being a portion between a pair of intake valves and opposing to an exhaust valve. CONSTITUTION:A par of intake valves 5 are arranged on one side of a cylinder head inner wall surface 3a, while at least one exhaust valve 7 is arranged on the other side of the cylinder head inner wall surface 3a. Openings of the intake valves 5 arranged on the side of the exhaust valve 7 are respectively covered with mask walls 15. An injection port 10 of a sub-chamber is opened in the vicinity of the cylinder head inner wall surface 3a, being a portion between the paired intake valves 5 and opposing to the exhaust valve 7. Combusted gas in the sub-chamber is drawn out by fresh air flowing in from the paired intake valves 5. The fresh air collected below the injection port 10 is fed to the sub-chamber through the injection port 10 during a compression stroke. An amount of fresh air introduced into the sub-chamber is thereby increased.
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公开(公告)号：JPH02252968A
公开(公告)日：1990-10-11
申请号：JP7037289
申请日：1989-03-24
Applicant: TOYOTA MOTOR CORP
Inventor： NIHEI HIROAKI , NOGUCHI HIROSHI , UMEHANA TOYOICHI , TATE TAKAO , KIDO YOSHIO , MASUBUCHI MASAHIKO
Abstract: PURPOSE:To secure the stable idling operation without installing a special device by controlling the valve opening time of an air blast valve which jets out fuel and compressed air into a combustion chamber so that the engine revolution speed becomes equal to an aimed revolution speed, in the engine idling operation. CONSTITUTION:An engine is equipped with an air blast valve 9 which jets out fuel, together with compressed air, into a combustion chamber 4. The air blast valve 9 is drive-controlled through a driving circuit 59 by the control signal outputted from an electronic control unit 50 into which a variety of detecting signals supplied from an engine revolution speed sensor 26, etc., are inputted. In this case, in the idling operation of the engine, the valve opening time of the air blast valve 9 is controlled so that the engine revolution speed becomes equal to an aimed revolution speed. In other words, in the idling operation of the engine, the operation of a mechanical supercharger 12 is suspended, and combustion is carried out only by the compressed air jetted from the air blast valve 9, and the jetted-out compressed air is controlled properly.
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公开(公告)号：JPH02233825A
公开(公告)日：1990-09-17
申请号：JP5368089
申请日：1989-03-08
Applicant: TOYOTA MOTOR CORP
Inventor： TATE TAKAO , NOGUCHI HIROSHI , UMEHANA TOYOICHI , KIDO YOSHIO , NIHEI HIROAKI , MASUBUCHI MASAHIKO
Abstract: PURPOSE:To secure good combustion by controlling negative pressure in a charging passage so as to become such setting negative pressure as growing larger when engine temperature or outside temperature is low, at time of engine idling. CONSTITUTION:A bypass valve 20 is set up in a bypass passage 19, while an absolute pressure sensor 27 is set up in space between a throttle valve 16 and a mechanical supercharger 12. At time of engine idling, the bypass valve 20 is controlled by an electronic control unit 30 so as to cause negative pressure in the charging duct 13 to become the preset negative pressure on the basis of an output signal of this absolute pressure sensor 27. Here, the setting negative pressure is made larger when engine temperature or outside temperature is low. With this constitution, when the engine temperature or outside temperature is relatively high, a driving loss of the mechanical supercharger 12 is reduced while engine speed is stabilized as checking any generation of knocking and self-ignition. In addition, when the engine temperature or outside temperature is low, the setting negative pressure is made larger in order to secure good combustion.
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公开(公告)号：JPH02104916A
公开(公告)日：1990-04-17
申请号：JP25602088
申请日：1988-10-13
Applicant: TOYOTA MOTOR CORP
Inventor： TATE TAKAO , NOGUCHI HIROSHI , UMEHANA TOYOICHI
Abstract: PURPOSE:To obtain better engine output by controlling the open-and-close timing of a feed valve so that oxygen density in exhaust gas can be a preset value. CONSTITUTION:In an electronic control unit 50, when the discrimination of the time for a medium load drive is made from the opening of a throttle valve 35 by the output signals of a throttle sensor 36 or from engine load by the output signals of an air flow meter 34 and an engine speed sensor 41, the open timing of an exhaust valve is delayed by a variable valve timing mechanism 43 for the exhaust valve. When oxygen density in exhaust gas is judged to be more than optimum oxygen density from the output signals of an O2 sensor 40, the open timing of a feed valve is delayed by the variable valve timing mechanism 43 for the feed valve to shorten an overlapping time. On the contrary, when the oxygen density in the exhaust gas is less than the optimum oxygen density, the open timing of the feed valve is hastened to lengthen the overlapping time. It is thus possible to fit the quantity of new air blow-through to be a desired value at which maximum engine output can be obtained.
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