公开(公告)号：JP2001304022A

公开(公告)日：2001-10-31

申请号：JP2000130466

申请日：2000-04-28

Applicant: TOYOTA MOTOR CORP ,  DENSO CORP

Inventor： YAMAGUCHI KATSUHIKO ,  KOBAYASHI YUKIO ,  HARADA OSAMU ,  HINO HARUJI ,  ABE SHINICHI ,  YAMAMOTO KENJI ,  KAWABATA TAKESHI

IPC: F02D29/02 ,  B60K6/20 ,  B60K6/445 ,  B60K6/448 ,  B60K6/46 ,  B60W10/06 ,  B60W10/08 ,  B60W20/00 ,  F02D29/06 ,  F02D41/16 ,  B60K6/02

Abstract: PROBLEM TO BE SOLVED: To improve reliability of idling control in the case where rotating speed of an internal combustion engine is controlled by the idling control and control requirement other than the idling control in the internal combustion engine. SOLUTION: When an acceleration operation in terminal at a time t0, fuel injection is cut, and rotating speed of an engine 150 is reducing-controlled by a motor MG1. When rotating speed of the engine 150 attains a prescribed value (1500 rpm) (at a time t1) while rotation of the engine 150 is controlled by the motor MG1, an ISC calculation demand is outputted. A changing process is performed to gradually reduce an engine target rotating speed calculation value t-ntcal (Step 330), and its changing process result is set to an engine target rotating speed entcal (Step 320). A deviation (an effective deviation ΔH) for calculating a valve opening is gradually reduced comparing with a case where the gradual change processing is not performed, and thereby, excessive valve closing driving is avoided.

公开(公告)号：JP2001304004A

公开(公告)日：2001-10-31

申请号：JP2000121571

申请日：2000-04-21

Applicant: TOYOTA MOTOR CORP

Inventor： KOJIMA MASAKIYO ,  HARADA OSAMU ,  YAMAGUCHI KATSUHIKO ,  KOBAYASHI YUKIO ,  HINO HARUJI ,  YAMANAKA AKIHIRO

IPC: F02D29/02 ,  B60K6/20 ,  B60K6/445 ,  B60K6/54 ,  B60W10/06 ,  B60W10/08 ,  B60W20/00 ,  F02D41/02 ,  F02P5/15 ,  B60K6/02

Abstract: PROBLEM TO BE SOLVED: To provide technique capable of suppressing generation of a shock caused by switching from a warm up operation condition to an ordinary operation condition, and provide a subject attaining improvement of drivability, in this invention, in a hybrid vehicle making an internal combustion engine warm up operate while making an electric motor function as a main drive source in the case or the like that necessity for activating an exhaust purifying part is generated. SOLUTION: In this internal combustion engine control device for a hybrid vehicle, in this invention, the hybrid vehicle, making an electric motor function as a main drive source of the vehicle under a prescribed condition also controlling a hybrid mechanism for warm up operating an internal combustion engine, is characterized by switching an operating condition of the internal combustion engine from a warm up operation condition to an operating condition matched with a required engine output in addition to in the case of the required engine output relating to the internal combustion engine exceeding a prescribed output also in the case of an accelerator opening exceeding a prescribed opening.

公开(公告)号：JP2001289086A

公开(公告)日：2001-10-19

申请号：JP2000103060

申请日：2000-04-05

Applicant: TOYOTA MOTOR CORP ,  DENSO CORP

Inventor： YAMAGUCHI KATSUHIKO ,  HARADA OSAMU ,  KOBAYASHI YUKIO ,  HINO HARUJI ,  ABE SHINICHI ,  YAMAMOTO KENJI ,  KAWABATA TAKESHI

IPC: F02D13/02 ,  F02D17/00 ,  F02D29/02

Abstract: PROBLEM TO BE SOLVED: To reduce the generation of NOx and vibration when restarting an engine. SOLUTION: In automatically stopping the engine, the rotational phase of an intake side camshaft is changed to the maximum delay angle (S3), and fuel cut-off is executed after completing the change to the maximum delay angle, (S6) to stop the rotation of the engine. The combustion of the engine is thereby continued even during the change of the rotational phase to suppress the generation of NOx at the restart caused by an oxygen storage effect due to the decrease of the oxygen supply quantity to a catalyst provided in an exhaust pipe. Prior to restarting the engine (S13), a crankshaft is rotated twice in a normal direction (S12) to rotate the intake side and exhaust side camshafts respectively by one round. The intake side camshaft is thereby positioned on the most delay side, and air in all the cylinders is changed to reduce rotational resistance caused by pressure in the cylinders. Engine speed is thereby increased rapidly passing through a resonance area when starting.

公开(公告)号：JP2001263213A

公开(公告)日：2001-09-26

申请号：JP2000079150

申请日：2000-03-21

Applicant: TOYOTA MOTOR CORP

Inventor： KOBAYASHI YUKIO ,  YAMAGUCHI KATSUHIKO ,  HARADA OSAMU ,  HINO HARUJI ,  ABE SHINICHI

IPC: F02P5/15 ,  B60K6/20 ,  B60K6/48 ,  B60K6/485 ,  B60K6/54 ,  B60L50/16 ,  B60W10/06 ,  B60W10/08 ,  B60W10/26 ,  B60W10/30 ,  B60W20/00 ,  F02D29/02 ,  B60L11/14

Abstract: PROBLEM TO BE SOLVED: To control a hybrid vehicle so as to satisfy both time requiring vehicle driving force and time requiring to restrain car body vibration when starting an internal combustion engine from operation of only an electric motor. SOLUTION: When requiring the vehicle driving force, the ignition timing is initially set to A, and the ignition timing is respectively advanced by (a) thereafter (S218). When requiring to restrain the car body vibration, the ignition timing is initially set to B of the ignition timing delay side from the A, and is set to (b) smaller than the (a) thereafter. Thus, when requiring to restrain the car body vibration, the ignition timing is delayed further to reduce a shock. When requiring the driving force, the ignition timing is advanced more than when requiring to restrain the vibration to obtain ordinary output earlier.

公开(公告)号：JPH11150806A

公开(公告)日：1999-06-02

申请号：JP32943097

申请日：1997-11-12

Applicant: TOYOTA MOTOR CORP

Inventor： HARADA OSAMU ,  YAMAGUCHI KATSUHIKO ,  SHIBATA YASUYUKI

IPC: B60W10/04 ,  B60K6/20 ,  B60K6/445 ,  B60L50/16 ,  B60W10/06 ,  B60W10/08 ,  B60W10/10 ,  B60W10/26 ,  B60W20/00 ,  F02D29/06 ,  B60L11/14 ,  B60K6/00 ,  B60K8/00 ,  B60K41/04

Abstract: PROBLEM TO BE SOLVED: To lessen a shock during a transient period in which an on-load running state for generating electric power changes into a no-load running state, including idling or motoring in a hybrid vehicle. SOLUTION: The output torque of a generator is controlled so as not to change sharply during the transient period, in which an on-load running state changes into a no-load running state with regard to a hybrid power outputting device, in which the generator is coupled mechanically to an engine. A possible means is to set the minimum revolutions of an internal combustion engine in the on-load running state which is larger than the speed in the no-load running state by 200 rpm. This setting makes the engine revolutions change smoothly from the on-load running state to the no-load running state. As a result, a sharp change can be suppressed in the torque of a generator under the PI control, based on the engine revolutions and thereby a shock to be caused by the sharp change of the torque can be lessened.

公开(公告)号：JPH03189343A

公开(公告)日：1991-08-19

申请号：JP32584789

申请日：1989-12-18

Applicant: TOYOTA MOTOR CORP

Inventor： HARADA OSAMU

IPC: F02D41/06 ,  F02M23/04

Abstract: PURPOSE:To prevent any stall or rough idle from occurring by constituting it to control a control valve with its opening being changed toward the full closure according to the elapsed time after complete explosion in the case where it is yet richer than the original state where an air-fuel mixture is set by a carburetor at time of starting. CONSTITUTION:A temperature condition detecting means D detects such a temperature condition as being shifted to the richer side than its original state where an air-fuel mixture is set by a carburetor 16 due to a high temperature state in this carburetor 16. A complete explosive state detecting means B detects the arrival of an engine 10 to its complete explosive state. A timer means C detects the elapsed time after arrival of the complete explosive state. In addition, a control valve driving means E forms an opening signal of a control valve A with its opening being changed toward the full closure according to the elapsed time after the complete explosive state arrival under the said temperature condition. Consequently, a rough idle or stall after being reached to the complete explosion at time of hot starting is thus prevented.

公开(公告)号：JPS6368747A

公开(公告)日：1988-03-28

申请号：JP21057986

申请日：1986-09-09

Applicant: TOYOTA MOTOR CORP

Inventor： HARADA OSAMU

IPC: F02D41/14 ,  F02D23/00 ,  F02D41/00 ,  F02D43/00 ,  F02P5/15 ,  F02P5/152 ,  F02P5/153

Abstract: PURPOSE:To expand the lean control area and to reduce the fuel consumption, by stopping the lean control only when the delay angle amount of the ignition time delay angle control to prevent a knock comes to a specific value or more, after a knock of the engine is detected. CONSTITUTION:In a control unit 20 during the engine operation, the fuel injection amount is computed depending on the engine load Q/N and the like which are found from outputs of airflow meter 11 and a rotation angle sensor 23. And it is decided whether the engine is at a high load operation or not according to the engine load Q/N. If the decision is YES, it is decided whether the delay angle amount of the ignition time is lower than a specific value or not, and if it is lower than that, it is decided whether the exhaust gas temperature detected by an exhaust gas temperature sensor 56 is lower than a specific value (about 800 deg.C). If the answer is YES, the fuel injection amount is multiplied by 0.8, for example, and the resultant value is adapted to the fuel injection amount to carry out the lean control. When the delay angle amount is at the specific value or more, the lean control is stopped and converted to the rich control.

公开(公告)号：JPS6368741A

公开(公告)日：1988-03-28

申请号：JP21057886

申请日：1986-09-09

Applicant: TOYOTA MOTOR CORP

Inventor： HARADA OSAMU

IPC: F02D41/14 ,  F02D41/00

Abstract: PURPOSE:To control the generation of knock and to reduce the damage of an engine, by stopping the lean control when a disorder of a knock sensor or an intercooler is detected, in an engine where the lean control is carried out when the exhaust gas temperature is lower than a specific value. CONSTITUTION:In a control unit 20 during an engine operation, the fuel injection amount is computed depending on the engine load Q/N and the like which are found from outputs of an airflow meter 11 and a rotation angle sensor 23. And it is decided whether the engine is in a high load operation or not depending on the engine load Q/N. In this case, if the decision is YES, it is decided whether the exhaust gas temperature detected by an exhaust gas temperature sensor 56 is lower than a specific value (about 800 deg.C) or not, and if the exhaust gas temperature

公开(公告)号：JPS61229971A

公开(公告)日：1986-10-14

申请号：JP7178085

申请日：1985-04-04

Applicant: TOYOTA MOTOR CORP

Inventor： HARADA OSAMU ,  ANZAI KATSUSHI ,  SUEMATSU TOSHIO ,  TAKEDA YUJI

IPC: F02P5/152 ,  F02P5/153

Abstract: PURPOSE:To prevent an engine from reaching a preignition condition, by comparing a peak value of outouts from a knock sensor with first and second reference values to decide whether or not knocking is generated, and controlling an ignition timing according to a result of the decision. CONSTITUTION:When a peak value of outputs from a knock sensor 22 exceeds a first reference value based on a background value of the outputs from the knock sensor, it is decided that knocking is generated. When the peak value is not higher than the first reference value, a second reference value is calculated according to an engine rotational speed of load, the second reference value is corrected according to a battery voltage, engine coolant temperature and oil temperature. When the peak value exceeds the second reference value corrected, it is decided that knocking is generated. Thus, when generation of knockins is decided, an ignition timing of the engine is controlled to be retarded, thereby reliably detecting the generation of knocking and preventing the engine from reaching a preignition condition.

公开(公告)号：JPS61187550A

公开(公告)日：1986-08-21

申请号：JP2880585

申请日：1985-02-15

Applicant: TOYOTA MOTOR CORP

Inventor： SUEMATSU TOSHIO ,  TAKEDA YUJI ,  HARADA OSAMU ,  ANZAI KATSUSHI

IPC: F02D41/08 ,  F02D41/00

Abstract: PURPOSE:To shorten the warming time by increasing the inhaled air amount when the increase of the inhaled air amount continues over a prescribed time, in the air-amount increasing operation for the engine operation with the relatively higher revolution speed when the engine is cold. CONSTITUTION:A control valve 13 is installed into a bypass passage 12 formed so as to make a detour around a throttle valve 10 in an intake passage, and the idle revolution speed is controlled by controlling the opening degree of the control valve 13. Said control valve 13 is constituted so as to move a valve pipe 25 by a step motor 26, and said step motor 26 is controlled according to the engine operation state by an electronic control circuit 20. In other words, when the cooling-water temperature detected by a water temperature sensor 9 is below a prescribed value, the intake air amount is increased, and the engine is operated with the revolution speed higher than the idle revolution speed after warming. When the increase of the inhaled air amount continues over a prescribed time, the intake air amount is increased furthermore.