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公开(公告)号：JPH1089053A
公开(公告)日：1998-04-07
申请号：JP26518696
申请日：1996-09-13
Applicant: TOYOTA MOTOR CORP
Inventor： IZUMITANI NAOHIDE
IPC: B60K17/04 , B60K6/20 , B60K6/22 , B60K6/445 , B60L1/02 , B60L3/00 , B60L50/15 , B60W10/06 , B60W10/08 , B60W10/26 , B60W10/30 , B60W20/00 , F01N3/20 , F01N3/24 , F01N9/00 , F02D29/02 , B60L11/12
Abstract: PROBLEM TO BE SOLVED: To attempt compatibility between the performance of the power of a vehicle and emission in a hybrid type vehicle in which a catalyst for controlling the exhaust gas of an engine 19 warmed up by energization to an electric heater, by setting distribution of motor supply electric power and heater supply electric power so as to control energization. SOLUTION: When a vehicle is driven a vehicle controller 60 drivingly controls an engine, and also supplies the generated output of a generator 14 to a traveling motor 16 and controls charging to a battery. At this time, in the case of catalyst warming up treatment when the engine is started, it is judged whether or not there is requirement for starting the engine when it is judged that an ignition switch 70 is switched on and the engine is stopped. Next, a charging quantity is read in by a battery capacity sensor 78, a heater current value and heater energizing time are calculated on the basis of this charging quantity, and the temperature rise to a catalyst by the heating of an electric heater 43b is started. Then, when it is judged that the heater energizing time is passed, the engine is started by the generator 14.
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公开(公告)号：JPH102239A
公开(公告)日：1998-01-06
申请号：JP17563596
申请日：1996-06-14
Applicant: TOYOTA MOTOR CORP
Inventor： YAMAZAKI SUEHIRO , OTSUKA IKU , IZUMITANI NAOHIDE
IPC: B60K6/20 , B60K6/24 , B60K6/445 , B60L7/22 , B60L50/10 , B60L50/15 , B60L50/16 , B60W10/06 , B60W10/08 , B60W10/10 , B60W10/18 , B60W10/184 , B60W10/26 , B60W20/00 , F02D9/02 , F02D13/02 , F02D29/02 , F02D41/12 , F02D43/00 , B60K6/00 , B60K8/00 , B60K41/26 , B60L11/14
Abstract: PROBLEM TO BE SOLVED: To reduce a shock and improve fuel consumption, in the case of deceleration by brake operation when an engine is fuel cut controlled. SOLUTION: During fuel cut control (step S102), in a deceleration condition of the prescribed or more (step S104), further with decision of a battery not having a full charge amount, an intake/exhaust valve is normally opened (step S110), and simultaneously with this opening, a generator is regeneratively controlled. In this way, inside a cylinder communicates with an intake/exhaust pipe through a passage of the intake/exhaust valve, because of not compressing gas only by inside the cylinder, friction is reduced.
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公开(公告)号：JPH08232769A
公开(公告)日：1996-09-10
申请号：JP3814995
申请日：1995-02-27
Applicant: TOYOTA MOTOR CORP
Inventor： MORITA KOJI , ONAKA HIDEMI , IZUMITANI NAOHIDE
Abstract: PURPOSE: To realize high-precise EGR control without using an altitude sensor by a method wherein an altitude amount is calculated based on a maximum opening amount of an EGR valve and a target EGR valve opening amount is corrected based on the calculating value, in an exhaust gas reflux control device to effect feedback control by using an EGR valve with a lift sensor. CONSTITUTION: A control circuit 10 inputs a detecting value for a lift amount of the shaft 33 of an EGR valve 9 from a lift sensor 30, and effects feedback drive of a load control valve 50 so that a lift value is adjusted to a target value responding to an engine operation state. In this case, in a highland decision processing, in a high load operation region wherein a negative pressure P3 in an intake pipe is reduced to a value lower than a pressure regulation negative pressure P2 necessary to allow full opening of the EGR valve 9, since a difference due to an altitude is produced at a maximum pressure regulation negative pressure, i.e., a maximum lift amount (a maximum valve opening amount) driven at a negative pressure P3 in the intake pipe, a highland is decided through detection of the difference. According to a decided altitude, a target EGR valve opening amount is corrected.
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公开(公告)号：JPH08128360A
公开(公告)日：1996-05-21
申请号：JP26891494
申请日：1994-11-01
Applicant: TOYOTA MOTOR CORP
Inventor： IZUMITANI NAOHIDE , OONAKA HIDEMI
Abstract: PURPOSE: To accurately detect a clogged position in an exhaust gas reflux passage without increasing cost in an EGR device having an EGR control valve in the exhaust gas reflux passage. CONSTITUTION: In an exhaust gas reflux control device having an EGR control valve 9 in an exhaust gas reflux passage 8, an orifice 80 is arranged on the exhaust side of the EGR control valve 9, and a negative pressure chamber 81 is formed between the orifice 80 and the EGR control valve 9, and pressure in this negative pressure chamber 81 is made detectable by a pressure detecting means 17. The device is constituted so that when a detecting value of the pressure detecting means 17 is smaller than a preset negative pressure value when an operating condition of an internal combustion engine is put in a first operating area where an EGR reflux quantity is more than a prescribed value, it is judged as intake air side clogging of the EGR passage 8, and to the contrary, when the detecting value of the pressure detecting means 17 is larger than the preset negative pressure value when the EGR reflux quantity is put in a second operating area where the EGR reflux quantity is less than the prescribed value, it is judged as exhaust side clogging of the EGR passage 8. An ON/OFF type pressure switch can also be used as the pressure detecting means 17.
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公开(公告)号：JPH06317224A
公开(公告)日：1994-11-15
申请号：JP10567193
申请日：1993-05-06
Applicant: TOYOTA MOTOR CORP
Inventor： IZUMITANI NAOHIDE , ONAKA HIDEMI
IPC: F02M25/07
Abstract: PURPOSE:To provide an exhaust gas recirculation device of an internal combustion engine having a diaphragm type control valve in the way of an exhaust reflux passage, and performing feedback-control based on the detected result of a contact type opening sensor so as to improve durability of a valve opening sensor. CONSTITUTION:Output signals of various kinds of sensors 24, 38, 40 showing the operational condition of an internal combustion engine are inputted. When an exhaust reflux control (EGR) condition is satisfied the operational range of an internal combustion engine is judged. When it is in a range (A range) largely influenced by variation of a reflux quantity, duty frequency of the driving signal of an EGR valve 21 is made 30Hz by emphasizing importance of accuracy, and it is made 20Hz or 10Hz respectively in B and C ranges less influenced by accuracy. Friction of a contact type valve opening sensor 24 is suppressed in the B and C ranges.
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Patent Agency Ranking
公开(公告)号：JPH06317223A
公开(公告)日：1994-11-15
申请号：JP10845393
申请日：1993-05-10
Applicant: TOYOTA MOTOR CORP
Inventor： IZUMITANI NAOHIDE , ONAKA HIDEMI
IPC: F02M25/07
Abstract: PURPOSE:To provide an exhaust gas recirculation controller of an internal combustion engine which can improve drivability and exhaust emission. CONSTITUTION:An exhaust gas recirculation controller is provided with a required opening calculation means M7 for calculating the required opening of an exhaust gas reflux valve M5 according to the operational condition of an internal combustion engine M1, a standard duty ratio calculation means M8 for calculating a reference duty ratio to a control valve M6 in response to the required opening, a real opening detection means M9 for detecting real opening of the exhaust gas reflux valve M5, an opening difference calculation means M10 for calculating opening difference between the required opening and the real opening, and a correction means M11 for correcting the reference ratio in response to the opening difference. A control valve M6 is controlled by the duty ratio after the correction and then the opening of the exhaust gas reflux valve M5 is varied.
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公开(公告)号：JPH0643817B2
公开(公告)日：1994-06-08
申请号：JP28440585
申请日：1985-12-19
Applicant: TOYOTA MOTOR CORP
Inventor： HOSHI KOICHI , NOMURA KENICHI , YOSHIOKA MAMORU , IZUMITANI NAOHIDE
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公开(公告)号：JPH02207159A
公开(公告)日：1990-08-16
申请号：JP2396289
申请日：1989-02-03
Applicant: TOYOTA MOTOR CORP
Inventor： IZUMITANI NAOHIDE
Abstract: PURPOSE:To judge deterioration with high precision by judging that a ternary catalyst is deteriorated when the time until the output of an air-fuel ratio sensor on the downstream side of the ternary catalyst is reversed from rich to lean after the air-fuel ratio of an engine is reversed from rich to lean is the preset time or below. CONSTITUTION:The air-fuel ratio of an engine is adjusted by a means D in response to outputs of air-fuel ratio sensors B and C on the upstream side and the downstream side of a ternary catalyst A installed on the exhaust passage of an internal combustion engine. When the engine is in the preset operation state, the air-fuel ratio of the engine is forcefully made rich by a means E, then it is reversed to lean. A means F judges that the output of the air-fuel sensor C on the downstream side is reversed from rich to lean. The time until the output of the air-fuel ratio sensor C on the downstream side is reversed from rich to lean after the air-fuel ratio is forcefully reversed is measured by a means G. When the measured time is the preset time or below, a means H judges that the ternary catalyst A is deteriorated.
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公开(公告)号：JPH0291440A
公开(公告)日：1990-03-30
申请号：JP24248188
申请日：1988-09-29
Applicant: TOYOTA MOTOR CORP
Inventor： SONODA YUKIHIRO , BESSHO HIRONORI , FURUHASHI MICHIO , IZUMITANI NAOHIDE , SAWAMOTO HIROYUKI , HOSHI KOICHI , OSAWA KOICHI
Abstract: PURPOSE:To exactly judge the medium degree of deterioration of three-way catalyst by determining that the catalyst of a catalyst converter is deteriorated when the frequency of inversions of the output from a lower side air fuel ratio sensor per specified period is over the specified value. CONSTITUTION:A primary comparison means compares the output V1 of an upper side air fuel ratio sensor with a primary comparison voltage VR1. A load detecting means detects the quantity Q of intake air and according to the load Q, a comparison voltage computing means computes the secondary comparison voltage VR2 as such that when the load Q is high, the voltage is computed to the value of estimating the air fuel mixture rich and when the load Q is low, the voltage is to the value of estimating the mixture lean. A secondary comparison means compares the output V2 of a lower air fuel ratio sensor with the secondary comparison voltage VR2. According to both the results, an air fuel ratio adjusting means adjusts the air fuel ratio. Meanwhile an inversion number computing means counts the number CS of inversions of the output V2 from the lower air fuel ratio sensor per specified period and a catalyst deterioration determining means determines that the catalyst of the catalyst converter is deteriorated when the number CS of inversions is over the specified value CS0.
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公开(公告)号：JPH01315640A
公开(公告)日：1989-12-20
申请号：JP14661388
申请日：1988-06-14
Applicant: TOYOTA MOTOR CORP
Inventor： HOSHI KOICHI , BESSHO HIRONORI , OSAWA KOICHI , FURUHASHI MICHIO , IZUMITANI NAOHIDE , SONODA YUKIHIRO , SAWAMOTO HIROYUKI
Abstract: PURPOSE:To detect a trouble damage caused by the entry of air into an exhaust system by making a decision of the trouble of the exhaust system if the mixture at the lower side of a three-way catalyst does not change to be enriched when the air-to-fuel ratio feedback control constant is kept limited to the enrichness compensating upper limit during the specified period or more. CONSTITUTION:Air-to-fuel ratio detecting means M3 and M4 are placed at the upper and the lower side of a three-way catalyst M2 and based on the output from the lower-side air-to-fuel ratio detection means M4, a computing means M5 computes the air-to-fuel ratio feedback control constant within the enrichness compensation upper limit. Using this control constant, a control means M6 computes the air-to-fuel ratio control variable on the basis of the output of the upper-side air-to-fuel ratio detecting means M3 to control an air-to-fuel ratio regulating means M7. In this case when a decision means 8 decides that the control constant is kept limited to the enrichness compensation upper limit during the specified period or more, and a decision means 9 decides that the lowser-side air-to-fuel ratio will not be changed to be enriched within the specified period, a trouble detecting means M10 detects that a trouble occurs at an exhaust system.
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