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31. 发明专利

JP2001329936A INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JP2001329936A
公开(公告)日：2001-11-30
申请号：JP2000152705
申请日：2000-05-18
申请人： TOYOTA MOTOR CORP
发明人： YOSHIZAKI KOJI , SASAKI SHIZUO , GOTO MASAHITO , ITO TAKEKAZU
IPC分类号： F02P19/02 , F02B31/02 , F02D41/40 , F02D43/00 , F02M25/07
摘要： PROBLEM TO BE SOLVED: To prevent unstable combustion due to excessive advancement of fuel injection timing while preventing electric excitation to a glow plug in an unnecessary time. SOLUTION: When low-temperature combustion, in which soot is hardly generated because an EGR gas amount fed into a combustion chamber 5 is higher than an EGR gas amount generating a peak amount of soot, is carried out and advancement of the fuel injection timing beyond a predetermined fuel injection timing is not adequate, advancement of the fuel injection timing beyond the predetermined fuel injection timing is stopped, and current is carried to the glow plug 60, so that atomized fuel ignitability and combustion can be stabilized.

32. 发明专利

JP2001329902A INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JP2001329902A
公开(公告)日：2001-11-30
申请号：JP2000149824
申请日：2000-05-17
申请人： TOYOTA MOTOR CORP
发明人： YOSHIZAKI KOJI , SASAKI SHIZUO , GOTO MASAHITO , ITO TAKEKAZU
IPC分类号： F02M25/07 , F01N3/00 , F02B3/06 , F02D9/02 , F02D21/08 , F02D41/00 , F02D41/02 , F02D41/04 , F02D41/14 , F02D43/00 , F02D45/00
摘要： PROBLEM TO BE SOLVED: To prevent pipe catalyst for purification of EGR gas from being poisoned by SOF when low temperature combustion is carried out and an air fuel ratio is shifted to the richer side than the stoichometric state. SOLUTION: An EGR passage 24 equipped with an EGR control valve 25 and pipe catalyst 26a for air purification is provided, When low temperature combustion in which soot is hardly produced because a quantity of EGR gas supplied into a combustion chamber 5 is more than a quantity of EGR gas to create peak soot production is carried out and an air fuel ratio is shifted to the rich side than the stoichometric state, an exhaust gas temperature is increased by reducing the opening of a throttle valve 17, the quantity increase of the EGR gas is suppressed by reducing the opening of an EGR control valve 25 and lowering of the EGR gas temperature and the temperature drop in the pipe catalyst 26a are suppressed.

33. 发明专利

JP2000145525A INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JP2000145525A
公开(公告)日：2000-05-26
申请号：JP32101598
申请日：1998-11-11
申请人： TOYOTA MOTOR CORP
发明人： GOTO MASAHITO , SASAKI SHIZUO , YOSHIZAKI KOJI , ITO TAKEKAZU , MURATA HIROKI
IPC分类号： B60W10/04 , B60W10/06 , B60W10/18 , F02D29/02 , F02D41/02 , F02D41/04 , F02D41/12 , F02D41/22 , F02D45/00 , F02M25/07 , B60K41/20
摘要： PROBLEM TO BE SOLVED: To simultaneously prevent the discharge of soot and NOx, and to prevent the occurrence of engine stall. SOLUTION: This internal combustion engine simultaneously prevents discharging soot and NOx by executing low-temperature combustion wherein an EGR gas amount supplied into a combustion chamber 5 is more than the EGR gas amount at a peak of generation amount of soot, and wherein soot is hardly generated in order to prevent the discharge of soot and NOx at the same time. When low temperature combustion is conducted and the occurrence of engine stall is expected, namely when hard braking is judged on the basis of output data from a brake switch 60, a crank angle sensor 52, vehicle speed sensor 61, and the like, the performance of low temperature combustion is prohibited or the air-fuel ratio is sifted to a lean side, consequently the occurrence of engine stall is prevented.

34. 发明专利

JP2000145505A INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JP2000145505A
公开(公告)日：2000-05-26
申请号：JP32396498
申请日：1998-11-13
申请人： TOYOTA MOTOR CORP
发明人： SASAKI SHIZUO , GOTO MASAHITO , ITO TAKEKAZU , YOSHIZAKI KOJI , MURATA HIROKI
IPC分类号： F02M25/07 , F01N3/08 , F01N3/24 , F02D41/02 , F02D41/04 , F02D43/00
摘要： PROBLEM TO BE SOLVED: To surely suppress engine vibration at the time of idling by controlling an intake air rate so as to converge engine rotating speed to a target value, and controlling an inert gas rate to the target value so as to converge intake pipe negative pressure to the target value, in a device wherein inert gas is supplied into a combustion chamber. SOLUTION: When inert gas is supplied into a combustion chamber 5, a generating rate of soot is increased, and attains a peak value. After that, when inert gas rate is supplied, a condition becomes an operating condition in which the soot is hardly generated. In such constituted internal combustion engine 1, an intake air rate is controlled to a target value at the time of combustion when an inert gas rate much more than an inert gas rate having peaked soot generating rate is supplied into the combustion chamber, and at the time of an idling operation, and a rate of the inert gas supplied into the combustion chamber 5 is controlled to the target value. After a rate of the inert gas supplied into the combustion chamber 5 is controlled, a rate of fuel injected from a fuel injection valve into the combustion chamber 5 is controlled to the target value so as to surely suppress engine vibration.

35. 发明专利

JP2000145501A INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JP2000145501A
公开(公告)日：2000-05-26
申请号：JP32254698
申请日：1998-11-12
申请人： TOYOTA MOTOR CORP
发明人： SASAKI SHIZUO , GOTO MASAHITO , ITO TAKEKAZU , YOSHIZAKI KOJI , MURATA HIROKI
IPC分类号： F02M25/07 , F01N3/08 , F01N3/20 , F01N3/24 , F02D41/04
摘要： PROBLEM TO BE SOLVED: To improve purifying performance of NOx by setting a condition in a combustion condition in which rates of inert gas supplied to a combustion chamber is differed from each other in a first operating region of a low load side and a second operating region of a high load side, and setting an air-fuel ratio of exhaust gas to a theoretical air-fuel ratio while the combustion condition is changed from the first combustion condition to the second combustion condition. SOLUTION: In an internal combustion engine 1 wherein NOx absorbent 25 is arranged in an exhaust passage, combustion is changed into first combustion in which a rate of inert gas supplied into a combustion chamber is much more than a rate of inert gas having peaked soot generating rate and soot is hardly generated, and second combustion in which a rate of inert gas supplied into the combustion chamber is few more than the rate of inert gas having peaked soot generating rate. First combustion is performed in an operating region of a low load side and second combustion is performed in an operating region of a high load side. While the combustion is changed from the first combustion into the second combustion, an air-fuel ratio of exhaust gas is set to a stoichiometric air-fuel ratio or a rich condition, and NOx absorbed to the NOx absorbent 25 is discharged and reduced.

36. 发明专利

JP2000130270A INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JP2000130270A
公开(公告)日：2000-05-09
申请号：JP30848398
申请日：1998-10-29
申请人： TOYOTA MOTOR CORP
发明人： ITO TAKEKAZU , SASAKI SHIZUO
IPC分类号： F02B37/00 , F01N3/02 , F01N3/08 , F01N3/24 , F02D21/08 , F02D23/00 , F02D41/02 , F02D43/00 , F02M25/07
摘要： PROBLEM TO BE SOLVED: To cool recirculating exhaust gas to the desired temperature while simultaneously preventing discharge of soot and NOx even with a water-cooled cooler of a low capacity and to supply the recirculating exhaust gas of stable temperature into a combustion chamber. SOLUTION: Low-temperature combustion where the amount of EGR gas to be supplied into a combustion chamber 5 is more than the EGR gas amount with the peak generation of soot and thus generates almost no soot can be performed, and an air-cooled EGR cooler 1032 and a water-cooled EGR cooler 32 are arranged in an EGR passage 29 for connecting an engine exhaust passage to an engine intake passage. EGR gas flowing in the EGR passage 29 is cooled by the air-cooled EGR cooler 1032 and then cooled by the water-cooled EGR cooler 32 having the cooling water temperature more stable than the outside air temperature.

37. 发明专利

JP2000130248A INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JP2000130248A
公开(公告)日：2000-05-09
申请号：JP29858898
申请日：1998-10-20
申请人： TOYOTA MOTOR CORP
发明人： SASAKI SHIZUO , GOTO MASAHITO , ITO TAKEKAZU , YOSHIZAKI KOJI , MURATA HIROKI
IPC分类号： F02M25/07 , F01N3/08 , F01N3/24 , F02D41/02 , F02D41/04 , F02D41/14 , F02D43/00 , F02D45/00
摘要： PROBLEM TO BE SOLVED: To ensure such proper combustion that the change of an operating state does not cause smoke or poor combustion. SOLUTION: A first combustion having more EGR gas amount in a combustion room 5 than EGR gas amount in which the generation amount of a soot becomes peek and in which the soot is scarcely generated and a second combustion having less EGR gas amount in the combustion room 5 than EGR gas amount in which the generation of the soot becomes peek are carried out selectively. The oxygen density in a re-circulation exhaust gas supplied in an engine suction passage is estimated and at least one side of the air fuel ratio or re- circulation exhaust gas ratio is controlled to a target value based on the oxygen density in the estimated re-circulation exhaust gas.

38. 发明专利

JP2000130218A INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JP2000130218A
公开(公告)日：2000-05-09
申请号：JP30864698
申请日：1998-10-29
申请人： TOYOTA MOTOR CORP
发明人： SASAKI SHIZUO , GOTO MASAHITO , ITO TAKEKAZU , YOSHIZAKI KOJI , MURATA HIROKI
IPC分类号： F02M25/07 , F01N3/00 , F01N3/08 , F01N3/24 , F02D21/08 , F02D41/02 , F02D41/06 , F02D43/00
摘要： PROBLEM TO BE SOLVED: To carry out the stable combustion without the generation of a smoke and an accidental fire at the warming up time of an engine. SOLUTION: A first combustion in which EGR gas amount in a combustion chamber 5 is much more than EGR gas amount in which the generation amount of a soot becomes peek and the soot is scarcely generated and a second combustion in which EGR gas amount in the combustion chamber 5 is less than EGR gas amount in which the generation amount of the soot becomes peek are carried out selectively. At the warming up time of an engine, the fuel injection timing is quickened, the fuel injection pressure is increased, the re-circulation exhaust gas ratio is dropped or the air fuel ratio is enlarged in comparison with after finishing the engine warming up.

39. 发明专利

JP2000130215A MULTI-CYLINDER INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JP2000130215A
公开(公告)日：2000-05-09
申请号：JP29988298
申请日：1998-10-21
申请人： TOYOTA MOTOR CORP
发明人： GOTO MASAHITO , SASAKI SHIZUO , YOSHIZAKI KOJI , ITO TAKEKAZU , MURATA HIROKI , ABE TSUKASA
IPC分类号： F02M25/07 , F01N3/00 , F01N3/08 , F01N3/24 , F02D21/08 , F02D41/04 , F02D43/00
摘要： PROBLEM TO BE SOLVED: To simultaneously prevent the discharge of soot and NOx, to properly control combustion pressure when the combustion pressure is improper, and to properly control the combustion pressure of all cylinders even when combustion pressure detecting means are not arranged on all the cylinders. SOLUTION: This internal combustion engine is provided with a detecting means for detecting variations in combustion of each cylinder, and the variations in combustion of each cylinder is corrected on the basis of output value of the variations detecting means. A combustion pressure detecting means for detecting combustion pressure within a combustion chamber is arranged within a combustion chamber of any cylinder. At the time of executing low-temperature combustion wherein an EGR gas amount supplied into a combustion chamber 5 is more than the EGR gas amount at a peak of generation amount of soot, and wherein soot is hardly generated and after correcting the variations in combustion of each cylinder on the basis of the output value of a crank angle sensor 42, the air-fuel ratio or the combustion injection starting timing of all the cylinders is controlled on the basis of the output value of a combustion pressure sensor 47 arranged on any cylinder.

40. 发明专利

JP2000097078A INTERNAL-COMBUSTION ENGINE 失效
公开(公告)号：JP2000097078A
公开(公告)日：2000-04-04
申请号：JP26975098
申请日：1998-09-24
申请人： TOYOTA MOTOR CORP
发明人： ITO TAKEKAZU , SASAKI SHIZUO , YOSHIZAKI KOJI , GOTO MASAHITO , MURATA HIROKI
IPC分类号： F02M25/07 , F01N3/08 , F01N3/24 , F02D21/08 , F02D41/02 , F02D41/08 , F02D41/40 , F02D43/00
摘要： PROBLEM TO BE SOLVED: To hinder the temperature of a catalyst from sinking below its activat ing temp. when the engine is idling. SOLUTION: Two combustive conditions are provided and one of them is selected, i.e., the first combustion in which the EGR gas amount in a combustion chamber 5 is greater than the EGR gas amount where the soot generating amount shows a peak and little soot is produced and the second combustion in which the EGR gas amount in the combustion chamber 5 is smaller than the EGR gas amount where the soot generating amount shows peak. A catalyst 25 is installed in the exhaust passage of the engine. When the temp. of the catalyst 25 has sunk below the lower limit value, the temp. of the exhaust gas is raised or a large quantity of unburnt HC and CO is emitted from the engine.

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