专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

51. 发明专利

JPH11132072A VEHICLE CONTROL METHOD AND VEHICLE CONTROL SYSTEM 失效
公开(公告)号：JPH11132072A
公开(公告)日：1999-05-18
申请号：JP29721197
申请日：1997-10-29
申请人： HITACHI LTD
发明人： WATANABE TORU , TAKAHASHI SHINSUKE , SEKOZAWA TERUJI
IPC分类号： B60W10/04 , B60K31/00 , B60W10/10 , B60W10/11 , B60W30/00 , F02D11/10 , F02D29/02 , F02D41/04 , B60K41/06
摘要： PROBLEM TO BE SOLVED: To provide pleasant driving performance with a driver's intention reflected and smooth driving by conducting proper control coinciding with the characteristics of a preceding vehicle. SOLUTION: The driver's intention discriminating part 140 of a control unit 100 discriminates the driving intention of a driver according to an accelerator pedal depressing angle APS and a brake depressing angle BPS. A preceding vehicle driving nature discriminating part 150 discriminates a driving property of the previous vehicle according to the inter-vehicle distance L to the preceding vehicle and the brake lamp lighting frequency of the preceding vehicle. An engine steady driving characteristic setting part 160 is constituted so that a throttle valve opening calculating part 120, when a throttle valve opening is obtained, may change its characteristics based on the depressing angle of an accelerator pedal.

52. 发明专利

JPH10213015A METHOD FOR CALCULATING VALVE OPENING AREA OF ENGINE 失效
公开(公告)号：JPH10213015A
公开(公告)日：1998-08-11
申请号：JP1824097
申请日：1997-01-31
申请人： HITACHI LTD
发明人： TAKAHASHI SHINSUKE , HORI TOSHIO
IPC分类号： F02M25/07 , F02D9/02 , F02D41/02
摘要： PROBLEM TO BE SOLVED: To provide a method for calculating a valve opening area, in which an EGR rate can be retained with excellent accuracy to a target value not influenced by operational conditions such as temperature and pressure, and at the same time, an air flow can be also retained to its target value. SOLUTION: In this method for calculating the valve opening area of an engine, a throttle valve opening and an EGR valve opening which achieve a target air amount and a target EGR rate are calculated in a control unit 101 by introducing an appropriate pressure and temperature correction items on the basis of a theoretical formula concerning a flow and pressure in an intake pipe which are detected by an air amount sensor 104. Then, a throttle controller 111 and an EGR valve 109 are controlled.

53. 发明专利

JPH1026046A CONTROLLER OF CYLINDER INJECTION ENGINE 失效
公开(公告)号：JPH1026046A
公开(公告)日：1998-01-27
申请号：JP18071596
申请日：1996-07-10
申请人： HITACHI LTD
发明人： SHIMADA KOSAKU , TAKAHASHI SHINSUKE
IPC分类号： F02M69/00 , F02D41/02 , F02D41/04 , F02D41/06 , F02D41/32 , F02D41/34
摘要： PROBLEM TO BE SOLVED: To perform precise control of the fuel amount under the disturbance by which fuel pressure is changed, by detecting fuel pressure to be applied to an injector, taking the ratio of the detected fuel pressure to reference fuel pressure, and correcting the fuel injection pulse length. SOLUTION: A starting time reference pulse length table is a table of the engine cooling water temperature, retrieves and outputs the starting time reference pulse length Tis by taking the water temperature as an input. In the transition of fuel pressure rising, the starting time reference pulse length Tis is multiplied by the fuel pressure correction factor and corrected, and fuel injection is performed. That is, the injection pulse length from an injector 9 is changed according to the width of the actual fuel pressure. First, fuel pressure is read by a fuel pressure sensor 23 of an engine 7, the water temperature is read, and table retrieving of the starting time reference pulse length is performed. The fuel pressure ratio is found from reference fuel pressure and the measured fuel pressure, retrieving of the fuel pressure correction factor FPhos is performed, and the injection pulse length Ti is found from the expression of Ti=Tis×FPhos+Ts. The letter Ts indicates the invalid pulse length.

54. 发明专利

JPH09303180A ENGINE CONTROL METHOD 失效
公开(公告)号：JPH09303180A
公开(公告)日：1997-11-25
申请号：JP11600596
申请日：1996-05-10
申请人： HITACHI LTD
发明人： WATANABE TORU , TAKAHASHI SHINSUKE , SEKOZAWA TERUJI
IPC分类号： F02D9/02 , F02D41/04 , F02D41/14
摘要： PROBLEM TO BE SOLVED: To perform higher accurate engine control by making an opening target value approximate to the actual opening in the case that an engine condition is conformed to a prescribed condition further with a deviation of prescribed value or more provided between the target opening and the actual opening, in an engine provided with an electrically driven throttle valve. SOLUTION: In an idle operating condition with an accelerator step-in amount in a prescribed value or less, in the case of performing engine speed control maintaining an engine speed to a prescribed target rotational speed, in each prescribed control period, a target opening of a throttle valve 205, calculated on a control unit, is output to a throttle valve control device 206. The engine speed is conformed to a target speed, with the lapse of 3sec., Σ(i) used for calculating the target opening is substituted for (Σ(i)-ε/Ki). In the formula, εis a deviation between the target opening and a throttle valve opening, Ki is a PID control gain. Next, based on the newly calculated Σ(i), again the target opening of the throttle valve 205 is calculated.

55. 发明专利

JPH09177579A METHOD OF CONTROLLING FUEL INJECTION OF ENGINE 失效
公开(公告)号：JPH09177579A
公开(公告)日：1997-07-08
申请号：JP33644595
申请日：1995-12-25
申请人： HITACHI LTD
发明人： TAKAHASHI SHINSUKE
IPC分类号： F02D45/00 , F02D41/04
摘要： PROBLEM TO BE SOLVED: To estimate the fuel states within an inlet pipe and within a cylinder on the basis of a dynamic model, determine the fuel injection quantity attaining a prescribed combustion state, and reduce the exhaust gas in engine start. SOLUTION: This method comprises a step 701 for judging a cylinder to perform a fuel injection this time, a step 702 for calculating the fuel injection quantity Gfj corresponding to the judged cylinder on the basis of liquid membrane quantity estimated value Mfj, cylinder internal stayed fuel quantity Gwj, and a number of 7, and a step 703 for calculating the fuel injection pulse width Tij corresponding to the judged cylinder on the basis of a number of 8, and the steps are waited until a following interruption is requested. The fuel injection is executed by driving a fuel injection valve in the latest calculated pulse at a prescribed crank angle.

56. 发明专利

JPH07224698A LEARNING CONTROL METHOD OF ENGINE 失效
公开(公告)号：JPH07224698A
公开(公告)日：1995-08-22
申请号：JP13016094
申请日：1994-06-13
申请人： HITACHI LTD
发明人： TAKAHASHI SHINSUKE , FUNABASHI SEIJU , EBATA TOMOKAZU , SHIOTANI MAKOTO
IPC分类号： F02D45/00 , F02D41/04 , F02D41/14
摘要： PURPOSE:To enable an engine control parameter to make its automatic tuning. CONSTITUTION:A cylinder flow-in fuel quantity is calculated and stored (701), deviation in an air-fuel ratio is calculated (702), and it is judged wither it is larger than a specified value or not (703). It is judged whether an operational condition is in a specified range or not when the cylinder flow-in fuel quantity is larger than the specified value (704), an adhesive rate and time constant for carrying it out is renewed based on a delta rule when the operational condition is in the specified range (705). An interpolation coefficient is renewed so as to correct the adhesion and carrying-out parameter of fuel for administrating control performance, so as to decrease the control difference by the rule inference when the operational condition is not in the specified range (707). Consequently, since the parameter can be subjected to the automatic tuning, system development manhour can be decreased, and deterioration of controllability caused by the variation due to lapse of the time can be prevented.

57. 发明专利

JPH07119523A ENGINE LEARNING CONTROL METHOD 失效
公开(公告)号：JPH07119523A
公开(公告)日：1995-05-09
申请号：JP26606793
申请日：1993-10-25
申请人： HITACHI LTD
发明人： TAKAHASHI SHINSUKE
IPC分类号： F02D45/00 , F02D41/14
摘要： PURPOSE:To secure controllability through use of a plurality of parameters of different time constants of donominators as well as to dissolve deterioration of learning accuracy through application of theory of learning control by calculating the execution fuel injection quantity on the basis of a detection value, a target value and a correction value of the cylinder inlet fuel quantity. CONSTITUTION:When an engine is electronically controlled, the physical quantity related to an engine intake air quantity is detected by an air quantity sensor 12 and the engine exhaust air-fuel ratio is also detected by an air-fuel ratio sensor 13. A control unit 10 then not only calculates the target cylinder inlet fuel quantity on the basis of the detected physical quantity but also calculates the correction quantity upon performing a correction process on the calculation value based on linear joints of a plurality of dynamic element. The cylinder inlet fuel quantity is also calculated on the basis of the detected phisical quantity and the exhaust air-fuel ratio. Furthermore the coefficient of weight for linear joint is learnt and set on the basis of the deviation of the target cylinder inlet fuel quantity from the cylinder inlet fuel quantity. The execution fuel injection of an injector 121 is calculated in response to the target cylinder inlet fuel quantity and the correction quantity thereof.

58. 发明专利

JPH02173334A ADAPTABLE CONTROL METHOD FOR ENGINE 失效
公开(公告)号：JPH02173334A
公开(公告)日：1990-07-04
申请号：JP32577188
申请日：1988-12-26
申请人： HITACHI LTD
发明人： TAKAHASHI SHINSUKE , SEKOZAWA TERUJI , FUNABASHI SEIJU
IPC分类号： F02D41/04 , F02D41/10 , F02D41/12 , F02D41/14 , F02D45/00 , G05B13/02 , G05B13/04
摘要： PURPOSE:To heighten a control quality when a fuel supply quantity is controlled on the basis of the attachment rate of fuel to an air intake pipe wall surface and the evaporation rate of an attached fuel, by surmizing the attachment rate and the evaporation rate from an air fuel ratio or a fuel injection quantity or the like, and correcting the attachment rate and the evaporation rate calculated as above on the basis of a surmize result. CONSTITUTION:A parameter calculating means 13 which calculates the rate (an attachment rate) of an injected fuel being attached to an air intake pipe wall surface from the various detection amounts of an engine operation condition, and the rate (an evaporation rate) of an attached fuel evaporating at a unit time, is equipped, and on the basis of its output, the control of a fuel quantity supplied to each cylinder is conducted by means of a fuel injection controlling means 12. At such a controller as this, a parameter surmizing means 14 which surmizes the attachment rate and the evaporation rate from such time system data as an exhaust gas air fuel ratio, a fuel injection quantity, a measured air quantity or the like, is provided. And on the basis of its surmize result, the opposing relation of various detection quantities, the attachment rate and the evaporation rate is arranged to be made to be corrected by means of a parameter characteristic correcting means 15.

59. 发明专利

JPS6367517A SENSOR OUTPUT SIGNAL PROCESSOR 失效
公开(公告)号：JPS6367517A
公开(公告)日：1988-03-26
申请号：JP21158286
申请日：1986-09-10
申请人： HITACHI LTD
发明人： TAKAHASHI SHINSUKE , SEKOSAWA TERUJI , FUNABASHI SEIJU , SHIOTANI MAKOTO
IPC分类号： G01D3/028 , F02D45/00
摘要： PURPOSE:To improve measurement accuracy in a transient state by selecting a means which compensates response delay according to whether the variation in measured quantity is large or small or a means which reduces output noise. CONSTITUTION:A (proportional plus differential) circuit is a circuit for compensating the response delay of a hot wire sensor which can be approximated to primary delay and a value R1C1 is so determined as to equal the time constant of the primary delay. A primary filter circuit is a circuit for removing output noise of the hot wire sensor due to a Karman vortex. A throttle angle sensor output signal processing circuit consisting of a differentiating circuit and a comparator decides whether variation in throttle passing air capacity is large or small from whether or not the absolute value of a throttle angular velocity exceeds a specific value or not, thereby selecting the output signal of the (proportional plus differential) circuit or the primary filter circuit.

60. 发明专利

JP2002349319A ENGINE INJECTION AMOUNT ADJUSTING METHOD 失效
公开(公告)号：JP2002349319A
公开(公告)日：2002-12-04
申请号：JP2001153347
申请日：2001-05-23
申请人： HITACHI LTD
发明人： TANI SHIGEYUKI , TAKAHASHI SHINSUKE , KATO CHIAKI , KATOGI KOZO
IPC分类号： G01C21/00 , F02D29/02 , F02D41/04 , F02D45/00
摘要： PROBLEM TO BE SOLVED: To provide an engine injection amount adjusting method that adjusts the engine injection amount during engine operation to make up for any difference in properties of fuel used when there is a change in the properties, thereby suppressing a reduction in torque or deterioration of exhaust emissions caused by the change in properties of the fuel used. SOLUTION: An amount of fuel that flows into a cylinder during acceleration is calculated and a change is detected in response to the acceleration in relation to a response made during an acceleration made earlier than the preceding one. If a change is detected, a control parameter of the fuel injection amount is changed so as to offset an advance or a retard in the response to the amount of fuel flowing into the cylinder, thereby adjusting the fuel injection amount. Specifically, if, for example, the response retards, the control parameter that advances the response to the fuel injection amount is selected. If the response advances, on the other hand, the control parameter that retards the response to the fuel injection amount is selected.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式