Intake Valve Timing Altered Patents (Class 123/348)
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Patent number: 7458347Abstract: In an internal combustion engine equipped with a variable valve operating mechanism that performs a valve timing control and a valve lift amount control of at least one of an intake valve and an exhaust valve, target values of the valve timing and the valve lift amount set based on an engine operating condition are limited by a limit value to limit a control range of one of the valve timing and the valve lift amount in accordance with a control state of the other of the valve timing and the valve lift amount, so that the valve timing and the valve lift amount are controlled based on the respective target values one of which has been limited as above.Type: GrantFiled: May 24, 2004Date of Patent: December 2, 2008Assignee: Hitachi, Ltd.Inventor: Kenichi Machida
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Patent number: 7458348Abstract: In a V-type engine provided with a variable valve timing mechanism and variable valve lift mechanism for an intake valve, a torque difference between respective banks is obtained. In a region in which an opening area of the intake valve is larger than a threshold, valve timing of the intake valve by the variable valve timing mechanism is corrected so as to reduce the torque difference, whereas in a region in which the opening area of the intake valve is smaller than the threshold, lift characteristics of the intake valve by the variable valve lift mechanism is corrected so as to reduce the torque difference.Type: GrantFiled: March 27, 2006Date of Patent: December 2, 2008Assignee: Hitachi, Ltd.Inventors: Kenichi Machida, Hidekazu Yoshizawa
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Patent number: 7424874Abstract: In a V-type 8-cylinder engine in which the torque for rotating an intake camshaft is higher when intake valves of a #1 cylinder and a #3 cylinder in a left bank are closed, respective noses of a cam for opening and closing the intake valve of the #1 cylinder and a cam for opening and closing the intake valve of the #3 cylinder are each formed at a phase position displaced by X° (X>0) in the advance direction further from the phase position displaced in the advance direction by 90° with respect to the nose of a cam for opening and closing the intake valve of a cylinder fired after a delay of 180° in crank angle.Type: GrantFiled: September 18, 2006Date of Patent: September 16, 2008Assignee: Toyota Jidosha Kabushiki KaishaInventors: Fumio Takamiya, Shinji Sadakane, Toshio Imamura, Motoki Ohtani
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Publication number: 20080115762Abstract: An engine has a variable valve actuation mechanism that varies lift characteristics of an intake valve. An idle speed control apparatus has a control section for controlling an intake air amount of the engine in an idle state for adjusting an actual engine speed to a target engine speed. The control section sets a control amount related to control of the intake air amount in correspondence with the lift characteristics, which are varied by the variable valve actuation mechanism. Accordingly, the engine speed in the idle state is effectively controlled in correspondence with changes of the lift characteristics.Type: ApplicationFiled: August 26, 2005Publication date: May 22, 2008Inventors: Keizo Hiraku, Noboru Takagi, Kiyoo Hirose, Hirohiko Yamada
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Patent number: 7373922Abstract: An apparatus and method for controlling the intake air amount in an internal combustion engine provided with a throttle valve and an intake air amount changing means linked with the same, the intake air amount control apparatus and method of an internal combustion engine finding a target intake air amount mcta based on an accelerator opening degree and engine speed (step 101), determining a target setting Cvta for said intake air amount changing means based on at least said target intake air amount (step 103), and finding a target throttle opening degree ?tta based on model equations creating a model of an engine intake system and expressing the air passing through the engine intake system from said target intake air amount mcta and the target setting Cvta (step 107).Type: GrantFiled: July 30, 2004Date of Patent: May 20, 2008Assignee: Toyota Jidosha Kabushiki KaishaInventors: Harufumi Muto, Yuji Miyanoo, Akira Eiraku, Masashi Hakariya
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Publication number: 20080072875Abstract: An air intake control apparatus includes a body forming an intake passage for an internal combustion engine, a bore member retained within the body to be movable relative to the body and having a bore being in communication with the body and having an internal peripheral surface forming a portion of the intake passage, at least one shaft body penetrating through the bore member and rotatably provided at the body, at least one valve body fixed to the shaft body so as to adjust an opening degree of the intake passage in the bore member, and a reference portion defining a relative position of the bore member to the shaft body in an axial direction of the shaft body.Type: ApplicationFiled: September 17, 2007Publication date: March 27, 2008Inventor: Atsutoshi Ikegawa
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Publication number: 20080066715Abstract: A method of operating an engine having at least one cylinder during a homogeneous charge compression ignition is provided. The method comprises: directing a first air stream to the cylinder via a first throttle; directing a second, separate, air stream to the cylinder via a second throttle, said first stream at a higher temperature than said second air stream; regulating a total air flow of a mixture of the first and second streams to a desired value by varying both openings of the first throttle and the second throttle in a same direction; and adjusting compression ignition combustion timing by increasing an opening of one throttle and decreasing an opening of the other throttle.Type: ApplicationFiled: September 15, 2006Publication date: March 20, 2008Inventor: Mrdjan Jankovic
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Patent number: 7308875Abstract: An intake control apparatus of an internal combustion engine including respective intake valves 5 opened when intake air reaching respective branch intake paths r1 from a main intake path Rim of the internal combustion engine is introduced to respective combustion chamber 2, and respective intake control valves 15 respectively arranged upstream from the intake valves on the respective branch intake paths for adjusting an intake introducing time period Tq for introducing intake air into the combustion chamber 2 in which both of the valves are brought into an opened state by controller 17.Type: GrantFiled: April 6, 2006Date of Patent: December 18, 2007Assignee: Mitsubishi Jidosha Kogyo Kabushiki KaishaInventor: Shinichi Murata
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Patent number: 7290527Abstract: A method is provided for controlling an engine having an intake manifold and an outlet control device coupled to the manifold for controlling flow exiting the manifold and entering at least one cylinder of the engine. The engine further includes an inlet control device for controlling flow entering the manifold. The method includes providing an engine command; calculating a desired cylinder charge based on said command; and adjusting the outlet control device to provide said desired cylinder charge. The engine command may be, for example, a driver command, such as a driver torque command. Further, the outlet control device may be implement in with a variety of mechanisms. For example, in one embodiment the outlet control device is a valve of the engine having a variable lift. In one embodiment the outlet device is a valve having variable timing. Likewise, the inlet device may be adjusted in response to a variety of parameters.Type: GrantFiled: December 18, 2001Date of Patent: November 6, 2007Assignee: Ford Global Technologies LLCInventors: John David Russell, Allan J. Kotwicki, Brian D. Rutkowski
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Publication number: 20070215105Abstract: An internal combustion engine control apparatus is provided with a hydraulically operated variable valve operating mechanism for varying the valve timing of air intake valves, and a water temperature sensor for sensing engine coolant temperature to estimate the degree of engine warm-up. The valve operating mechanism is controlled to switch the valve timing from the warm-up idle valve timing with a high idling speed to the post-warm-up idle valve timing with a slower idling speed as the engine temperature approaches the warm-up temperature threshold. The switch in valve timings starts before an engine rotational speed falls below a rotational speed threshold lying between the high idling speed during the warm-up idling and the post-warm-up idling speed during the post-warm-up idling such that a sufficient hydraulic pressure switch the valve timing with a specific degree of responsiveness is attained when the engine rotational speed is at or above the rotational speed threshold.Type: ApplicationFiled: March 12, 2007Publication date: September 20, 2007Applicant: Nissan Motor Co., Ltd.Inventor: Hajime Miura
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Patent number: 7252061Abstract: An internal-combustion engine is equipped with a system of variable actuation of the intake valves that is controlled electronically for the purpose, of imparting on the valves different opening and closing times and different lifts according to the operating conditions of the engine. During one and the same cycle of operation of the engine, the system is able to impart on each intake valve a series of successive cycles of movements of opening and closing within the conventional cycle.Type: GrantFiled: May 15, 2006Date of Patent: August 7, 2007Assignee: C.R.F. Societa Consortile per AzioniInventor: Marco Lucatello
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Patent number: 7249588Abstract: A method for controlling an engine having both an electronically controlled inlet device, such as an electronic throttle unit, and an electronically controlled outlet device, such as a variable cam timing system is disclosed. The method of the present invention achieves cylinder air charge control that is faster than possible by using an inlet device alone. In other words, the method of the present invention controls cylinder air charge faster than manifold dynamics by coordination of the inlet and outlet device. This improved control is used to improve various engine control functions.Type: GrantFiled: September 2, 2005Date of Patent: July 31, 2007Assignee: Ford Global Technologies, LLCInventors: John David Russell, Brian D. Rutkowski
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Patent number: 7237530Abstract: A control apparatus for an internal combustion engine provided with a fuel vapor treatment system according to the invention includes a controller that discharges fuel vapor into an intake passageway by using the intake negative pressure, and which adjusts the amount of the intake air through the cooperative control of a variable control of at least one of the lift amount of an intake valve and the working angle of the intake valve, and a control of the degree of opening of a throttle valve. In addition, the control apparatus executes the variable control so that at least one of the lift amount and the working angle of the intake valve changes in accordance with the fuel vapor concentration in the fuel vapor treatment system.Type: GrantFiled: October 24, 2005Date of Patent: July 3, 2007Assignee: Toyota Jidosha Kabushiki KaishaInventors: Yuuji Miyanoo, Kiyoo Hirose
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Patent number: 7228827Abstract: A method for controlling an engine having both an electronically controlled inlet device, such as an electronic throttle unite, and an electronically controlled outlet device, such as a variable cam timing system is disclosed. The method of the present invention achieves cylinder air charge control that is faster than possible by using an inlet device alone. In other words, the method of the present invention controls cylinder air charge faster than manifold dynamics by coordination of the inlet and outlet device. This improved control is used to improve various engine control functions.Type: GrantFiled: October 17, 2005Date of Patent: June 12, 2007Assignee: Ford Global Technologies, LLCInventors: John David Russell, Allan Joseph Kotwicki
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Patent number: 7201143Abstract: An intake amount control apparatus of an internal combustion engine in accordance with the invention includes a control portion that controls an opening amount of a throttle valve provided in an intake passageway of the internal combustion engine and operation of a lift amount changing mechanism capable of changing a lift amount of an intake valve. The control portion controls the operation of the lift amount changing mechanism so that, prior to execution of a fuel cut control at the time of an engine deceleration, the lift amount of in intake valve becomes smaller than at the time of a normal engine idle operation where the fuel cut control is not executed.Type: GrantFiled: October 12, 2005Date of Patent: April 10, 2007Assignee: Toyota Jidosha Kabushiki KaishaInventors: Harufumi Muto, Kakuji Kagoshima, Yuichiro Ido
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Patent number: 7171943Abstract: A control apparatus for an internal combustion engine can avoid an increase in harmful components in an exhaust gas even if a variable valve timing mechanism is controlled to be driven at the time of executing the correction of basic timing. The apparatus includes a variable valve timing mechanism for adjusting the opening and closing timing of an intake valve, a variable valve timing control device for driving and controlling the variable valve timing mechanism based on an operating state of an internal combustion engine, a rotation speed detection part for detecting an engine rotational speed, and an intake negative pressure detection part for detecting an intake negative pressure in an intake pipe. The variable valve timing control device includes a basic timing correction permission part, a target intake negative pressure setting part, an intake air amount adjustment part, a correction time driving control part, and a basic timing correction part.Type: GrantFiled: February 10, 2006Date of Patent: February 6, 2007Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Koji Wada, Masakazu Miyasako, Motoyasu Suenaga
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Patent number: 7167789Abstract: A variable compression ratio internal combustion engine is programmably configured to operate in a plurality of compression ratios. Internal combustion engines with electronically controlled engine components that include electronic valve operation are programmed to operate individual engine cylinders with component states and stoke sequences that provide variable compression ratios by creation of a virtual cylinder within a physical cylinder. Cylinder volume dictates maximum compression ratio, which acts as a ceiling for the variable compression ratio that can be provided.Type: GrantFiled: May 16, 2005Date of Patent: January 23, 2007Inventors: Walt Froloff, Kenneth C Miller
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Patent number: 7152579Abstract: A method for controlling an engine having both an electronically controlled inlet device, such as an electronic throttle unite, and an electronically controlled outlet device, such as a variable cam timing system is disclosed. The method of the present invention achieves cylinder air charge control that is faster than possible by using an inlet device alone. In other words, the method of the present invention controls cylinder air charge faster than manifold dynamics by coordination of the inlet and outlet device. This improved control is used to improve various engine control functions.Type: GrantFiled: January 4, 2006Date of Patent: December 26, 2006Assignee: Ford Global Technologies, LLCInventors: John David Russell, Allan Joseph Kotwicki, Brian D. Rutkowski
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Patent number: 7152578Abstract: An electronic controller variably controls the center of an operating angle of an intake valve as follows: when an engine load factor is equal to or higher than a threshold in a low load operation, the electronic controller advances the center of the operating angle with a decrease in the engine load factor. When the engine load factor is lower than the threshold in the low load operation, the electronic controller retards the center of the operating angle with a decrease in the engine load factor.Type: GrantFiled: October 24, 2005Date of Patent: December 26, 2006Assignee: Toyota Jidosha Kabushiki KaishaInventor: Takasi Yui
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Patent number: 7128051Abstract: The amount of air to be introduced is controlled for each cylinder, whereby it is intended to make it possible to control the torque generated in each cylinder, perform an ultra-lean burn operation, purify the exhaust gas, and increase the output of an engine. An air flow control valve adapted to be on-off controlled in accordance with an operated quantity of an accelerator pedal is disposed in each branch pipe or intake port. The air flow control valve may be a throttle valve disposed in each branch pipe or it may be a variable intake valve for opening and closing the intake port.Type: GrantFiled: September 24, 2004Date of Patent: October 31, 2006Assignee: Hitachi, Ltd.Inventors: Toshiharu Nogi, Takuya Shiraishi, Minoru Ohsuga, Yoko Nakayama, Noboru Tokuyasu
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Patent number: 7077103Abstract: Disclosed is a method for regulating the filling of an internal combustion engine to which a combustion air mass flow is fed. Said combustion air mass flow is regulated by a first and a second actuator which are triggered regarding the position thereof. The second actuator is disposed downstream of the first actuator within the air mass flow and has a final upper position in which said actuator is open to the maximum and a final lower position in which the second actuator is closed to the maximum. The actual rotation speed of the internal combustion engine is detected while a set point intake pipe pressure is predefined for triggering the first actuator. The set point intake pipe pressure is determined by means of an rpm-related characteristic map in which the set point air mass flow is not taken into account as long as the second actuator is not located in the final lower position.Type: GrantFiled: July 14, 2003Date of Patent: July 18, 2006Assignee: Siemens AktiengesellschaftInventors: Michael Henn, Hong Zhang
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Patent number: 7032567Abstract: An internal combustion engine is provided with a variable mechanism capable of adjusting the amount of intake air introduced into each cylinder by controlling the operation angle of intake valves. In a low-load region, the intake valve operation angle is minimized, and the amount of intake air is controlled on the basis of the degree of throttle opening. In the low-load region, the operation angle of each valve is set so that there is no period during which both an intake valve and an exhaust valve are open. In a high-load region where the intake pipe pressure becomes equal to the atmospheric pressure, the amount of intake air is controlled on the basis of the operation angle. During this process, the degree of throttle opening is controlled so that the intake pipe pressure can be kept at the atmospheric pressure before and after the intake amount control based on the operation angle is performed.Type: GrantFiled: July 29, 2003Date of Patent: April 25, 2006Assignee: Toyota Jidosha Kabushiki KaishaInventors: Makoto Ogiso, Tomomi Yamada
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Patent number: 7028652Abstract: A device for controlling an internal combustion engine with a variable valve timing system is provided. While the piston descends just after the combustion in the cylinder, the intake valve is opened by the variable valve system for the intake valve such that the intake air is supplied into the cylinder from the engine intake system.Type: GrantFiled: October 30, 2003Date of Patent: April 18, 2006Assignee: Toyota Jidosha Kabushiki KaishaInventors: Yoshihiro Iwashita, Shigeo Kikori, Kazuhiko Shiratani, Shouji Katsumata, Keiji Yoeda, Makoto Ogiso, Hideyuki Nishida, Tomomi Yamada
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Patent number: 7021259Abstract: In an internal combustion engine, which is provided with a variable valve mechanism that varies an open/close characteristic of an intake valve, a target open/close characteristic of the intake valve is determined. Simultaneously, a control speed at a time when the intake valve is controlled to have the target open/close characteristic is determined. As a result, the variable valve mechanism is controlled according to the target open/close characteristic and the control speed.Type: GrantFiled: October 21, 2005Date of Patent: April 4, 2006Assignee: Hitachi, Ltd.Inventor: Kenichi Machida
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Patent number: 7021282Abstract: A torque control system for regulating operation of an engine includes a throttle that regulates air flow into the engine and a device that regulates a torque output of the engine. A first module determines a throttle area based on a desired manifold absolute pressure (MAP) and a desired manifold air flow (MAF) and a second module determines a device set-point based on a desired air per cylinder (APC) and an engine speed. A third module generates a throttle control signal to control the throttle based on the throttle area and generates a device control signal to control the device based on the device set-point.Type: GrantFiled: December 1, 2004Date of Patent: April 4, 2006Assignee: General Motors CorporationInventors: Michael Livshiz, Scott J. Chynoweth, Jeffrey M. Kaiser, Richard H. Clutz, Donovan L. Dibble, Bahram Younessi
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Patent number: 7021281Abstract: An internal combustion engine idle speed control system includes a first valve control mechanism that adjusts a first operating parameter of a first cylinder valve. A control module determines an idle speed error and generates a first control signal to the first valve control mechanism to adjust the first operating parameter. The first control signal is based on the idle speed error.Type: GrantFiled: July 14, 2004Date of Patent: April 4, 2006Assignee: General Motors CorporationInventor: Victoriano Ruiz
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Patent number: 7000588Abstract: A method for controlling an engine having both an electronically controlled inlet device, such as an electronic throttle unite, and an electronically controlled outlet device, such as a variable cam timing system is disclosed. The method of the present invention achieves cylinder air charge control that is faster than possible by using an inlet device alone. In other words, the method of the present invention controls cylinder air charge faster than manifold dynamics by coordination of the inlet and outlet device. This improved control is used to improve various engine control functions.Type: GrantFiled: January 27, 2004Date of Patent: February 21, 2006Assignee: Ford Global Technologies, LLCInventors: John David Russell, Allan Joseph Kotwicki, Brian D. Rutkowski
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Patent number: 6991052Abstract: By a lean burn operation, a highly efficient operation region is enlarged, the proportion of engine operation in a low torque condition is increased, and the proportion of motor operation using a battery is decreased. It is possible to provide a hybrid car of an engine-electric motor configuration which can effect a highly efficient operation without increasing the capacity of motor and that of battery.Type: GrantFiled: July 16, 2002Date of Patent: January 31, 2006Assignee: Hitachi, Ltd.Inventors: Toshiharu Nogi, Takuya Shiraishi, Minoru Oosuga, Noboru Tokuyasu, Yoko Nakayama
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Patent number: 6973901Abstract: In an internal combustion engine provided with a variable valve mechanism that varies an open/close characteristic of an intake valve, a target open/close characteristic of the intake valve is determined and at the same time, a control speed of when the intake valve is controlled to have the target open/close characteristic is determined, so that the variable valve mechanism is controlled according to the target open/close characteristic and the control speed.Type: GrantFiled: November 4, 2003Date of Patent: December 13, 2005Assignee: Hitachi, Ltd.Inventor: Kenichi Machida
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Patent number: 6962139Abstract: A method for controlling an engine having both an electronically controlled inlet device, such as an electronic throttle unite, and an electronically controlled outlet device, such as a variable cam timing system is disclosed. The method of the present invention achieves cylinder air charge control that is faster than possible by using an inlet device alone. In other words, the method of the present invention controls cylinder air charge faster than manifold dynamics by coordination of the inlet and outlet device. This improved control is used to improve various engine control functions.Type: GrantFiled: March 11, 2004Date of Patent: November 8, 2005Assignee: Ford Global Technologies, LLCInventors: John David Russell, Brian D. Rutkowski
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Patent number: 6945225Abstract: A method for controlling an engine having both an electronically controlled inlet device, such as an electronic throttle unite, and an electronically controlled outlet device, such as a variable cam timing system is disclosed. The method of the present invention achieves cylinder air charge control that is faster than possible by using an inlet device alone. In other words, the method of the present invention controls cylinder air charge faster than manifold dynamics by coordination of the inlet and outlet device. This improved control is used to improve various engine control functions.Type: GrantFiled: February 20, 2003Date of Patent: September 20, 2005Assignee: Ford Global Technologies, LLCInventors: John David Russell, Brian D. Rutkowski
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Patent number: 6840201Abstract: A variable valve timing control apparatus is provided which comprises an operation angle control mechanism capable of varying an intake operation angle, a phase control mechanism capable of varying an intake maximum lift phase, and a control unit that controls the operation angle control mechanism and the phase control mechanism in accordance with an engine operating condition, wherein the control unit has an engine temperature estimating section that estimates an engine temperature and controls the intake operation angle so that when the engine is operating in an extremely low-load range including idling, the intake operation angle when an engine temperature is extremely low is set larger than that when the engine is cold, the extremely low-engine temperature being lower than the engine temperature when the engine is cold. A method of controlling a variable valve timing of an internal combustion engine is also provided.Type: GrantFiled: March 11, 2003Date of Patent: January 11, 2005Assignee: Nissan Motor Co., Ltd.Inventor: Hajime Miura
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Publication number: 20040216718Abstract: A method is described for estimating cylinder airflow in engines that operate with manifold pressure near atmospheric pressure to compensate for degraded sensor response at such conditions. The method uses an adaptive approach that is updated under preselected engine operating conditions to thereby allow improved accuracy across a variety of engine operation.Type: ApplicationFiled: May 27, 2004Publication date: November 4, 2004Inventors: Ilya V. Kolmanovsky, John Ottavio Michelini
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Publication number: 20040168672Abstract: A method for controlling an engine having both an electronically controlled inlet device, such as an electronic throttle unite, and an electronically controlled outlet device, such as a variable cam timing system is disclosed. The method of the present invention achieves cylinder air charge control that is faster than possible by using an inlet device alone. In other words, the method of the present invention controls cylinder air charge faster than manifold dynamics by coordination of the inlet and outlet device. This improved control is used to improve various engine control functions.Type: ApplicationFiled: March 11, 2004Publication date: September 2, 2004Inventors: John David Russell, Brian D. Rutkowski
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Publication number: 20040154587Abstract: A method is provided for controlling an engine having an intake manifold and an outlet control device coupled to the manifold for controlling flow exiting the manifold and entering at least one cylinder of the engine. The engine further includes an inlet control device for controlling flow entering the manifold. The method includes providing an engine command; calculating a desired cylinder charge based on said command; and adjusting the outlet control device to provide said desired cylinder charge. The engine command may be, for example, a driver command, such as a driver torque command. Further, the outlet control device may be implement in with a variety of mechanisms. For example, in one embodiment the outlet control device is a valve of the engine having a variable lift. In one embodiment the outlet device is a valve having variable timing. Likewise, the inlet device may be adjusted in response to a variety of parameters.Type: ApplicationFiled: February 5, 2004Publication date: August 12, 2004Inventors: John David Russell, Allan J. Kotwicki, Brian D. Rutkowski
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Publication number: 20040134449Abstract: Method and system embody a valve timing strategy to control the autoignition timing of a four stroke internal combustion engine (10) operated in an HCCI mode at different engine operating conditions such as different engine speed and torque. A particular valve timing strategy varies lift timing of the intake valve (20) relative to the exhaust valve (28), or vice versa, and relative to top dead center in response to a change in engine torque, for example, to vary amount of trapped residual burned gas in the combustion chamber (12) flowing to an intake or exhaust port (16,18) and back to the combustion chamber during which the residual gas is cooled. Control of the flow of residual gas between the combustion chamber and intake or exhaust port and thus its temperature by the valve timing strategy, in turn, is used to control the temperature of the fresh air/residual gas/fuel mixture in the combustion chamber (12) and thus autoignition timing in response to a change in engine torque.Type: ApplicationFiled: January 13, 2003Publication date: July 15, 2004Applicant: FORD GLOBAL TECHNOLOGIES, INC.Inventor: Jialin Yang
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Patent number: 6718939Abstract: An engine cylinder induction air quantity measuring apparatus includes a controller to calculate an intake manifold inside air quantity of air in an intake manifold, from a sensed intake air quantity by performing a balance calculation to calculate a balance between an intake manifold inflow air quantity, and an intake manifold outflow air quantity; and to calculate a cylinder induction air quantity in accordance with the intake manifold inside air quantity. The controller is configured to determine whether an engine stop position of the engine is within the valve overlap period; and to set the intake manifold inside air quantity equal to an overlap stop mode final air quantity for use as an initial value of the intake manifold inside air quantity in a next start of the engine when the engine stop position is within the valve overlap period.Type: GrantFiled: January 15, 2003Date of Patent: April 13, 2004Assignee: Nissan Motor Co., Ltd.Inventors: Tetsuya Iwasaki, Shouichi Hayase
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Publication number: 20040060540Abstract: If during a specific steady operation state of an engine, the actual intake pipe pressure is different from a target intake pipe pressure set during the specific steady operation state, a first correction amount for the throttle valve control value is calculated by causing the actual intake pipe pressure to become equal to the target intake pipe pressure. If at this time the actual amount of intake air is still different from a target amount of intake air set during the specific steady operation state, a second correction amount for the variable valve control value is calculated by causing the actual amount of a intake air to become equal to the target amount of intake air. The second correction amount is used to further correct the throttle valve control value corrected by the first correction amount.Type: ApplicationFiled: September 22, 2003Publication date: April 1, 2004Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Naohide Fuwa
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Patent number: 6712041Abstract: A method for controlling an engine having both an electronically controlled inlet device, such as an electronic throttle unite, and an electronically controlled outlet device, such as a variable cam timing system is disclosed. The method of the present invention achieves cylinder air charge control that is faster than possible by using an inlet device alone. In other words, the method of the present invention controls cylinder air charge faster than manifold dynamics by coordination of the inlet and outlet device. This improved control is used to improve various engine control functions.Type: GrantFiled: October 18, 1999Date of Patent: March 30, 2004Assignee: Ford Global Technologies, Inc.Inventors: John David Russell, Allan Joseph Kotwicki, Brian D. Rutkowski
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Patent number: 6705284Abstract: A method for controlling an engine having both an electronically controlled inlet device, such as an electronic throttle unite, and an electronically controlled outlet device, such as a variable cam timing system is disclosed. The method of the present invention achieves cylinder air charge control that is faster than possible by using an inlet device alone. In other words, the method of the present invention controls cylinder air charge faster than manifold dynamics by coordination of the inlet and outlet device. This improved control is used to improve various engine control functions.Type: GrantFiled: November 5, 2002Date of Patent: March 16, 2004Assignee: Ford Global Technologies, LLCInventors: John David Russell, Allan Joseph Kotwicki, Brian D. Rutkowski
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Publication number: 20040031466Abstract: An internal combustion engine is provided with a variable mechanism capable of adjusting the amount of intake air introduced into each cylinder by controlling the operation angle of intake valves. In a low-load region, the intake valve operation angle is minimized, and the amount of intake air is controlled on the basis of the degree of throttle opening. In the low-load region, the operation angle of each valve is set so that there is no period during which both an intake valve and an exhaust valve are open. In a high-load region where the intake pipe pressure becomes equal to the atmospheric pressure, the amount of intake air is controlled on the basis of the operation angle. During this process, the degree of throttle opening is controlled so that the intake pipe pressure can be kept at the atmospheric pressure before and after the intake amount control based on the operation angle is performed.Type: ApplicationFiled: July 29, 2003Publication date: February 19, 2004Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Makoto Ogiso, Tomomi Yamada
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Patent number: 6679205Abstract: In an engine having an intake device provided with a solenoid valve, an amount of intake air is controlled on a basis of a duty control by means of a control unit, and the control unit includes an element for recognizing a state which is evidently different from a normal state to thereby stationarily hold a duty of the solenoid valve at a necessary set value.Type: GrantFiled: December 20, 2001Date of Patent: January 20, 2004Assignee: Suzuki Kabushiki KaishaInventor: Tadaaki Morikami
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Patent number: 6651620Abstract: A method for controlling an engine having both an electronically controlled inlet device, such as an electronic throttle unite, and an electronically controlled outlet device, such as a variable cam timing system is disclosed. The method of the present invention achieves cylinder air charge control that is faster than possible by using an inlet device alone. In other words, the method of the present invention controls cylinder air charge faster than manifold dynamics by coordination of the inlet and outlet device. This improved control is used to improve various engine control functions.Type: GrantFiled: November 5, 2002Date of Patent: November 25, 2003Assignee: Ford Global Technologies, LLCInventors: John David Russell, Allan Joseph Kotwicki, Brian D. Rutkowski
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Publication number: 20030154955Abstract: A method for controlling an engine having both an electronically controlled inlet device, such as an electronic throttle unite, and an electronically controlled outlet device, such as a variable cam timing system is disclosed. The method of the present invention achieves cylinder air charge control that is faster than possible by using an inlet device alone. In other words, the method of the present invention controls cylinder air charge faster than manifold dynamics by coordination of the inlet and outlet device. This improved control is used to improve various engine control functions.Type: ApplicationFiled: February 20, 2003Publication date: August 21, 2003Inventors: John David Russell, Brian D. Rutkowski
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Patent number: 6567740Abstract: In the event of a failure or a disruption of an exchange of data between a valve control unit and an operational control unit of an internal combustion engine with electromechanically activated inlet valves, a valve control unit switches over the electromagnetic activation of the inlet valves to full-load control times. The operational control unit suitably sets a throttle valve in order to cause the load control of the internal combustion engine no longer to be performed by the valve load control but rather by the throttle-valve load control in the emergency operating mode.Type: GrantFiled: October 22, 2001Date of Patent: May 20, 2003Assignee: Siemens AktiengesellschaftInventors: Volker Eichenseher, Andreas Hartke, Thomas Vogt
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Publication number: 20030084872Abstract: A method for controlling an engine having both an electronically controlled inlet device, such as an electronic throttle unite, and an electronically controlled outlet device, such as a variable cam timing system is disclosed. The method of the present invention achieves cylinder air charge control that is faster than possible by using an inlet device alone. In other words, the method of the present invention controls cylinder air charge faster than manifold dynamics by coordination of the inlet and outlet device. This improved control is used to improve various engine control functions.Type: ApplicationFiled: November 5, 2002Publication date: May 8, 2003Inventors: John David Russell, Allan Joseph Kotwicki, Brian D. Rutkowski
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Patent number: 6546910Abstract: A method and apparatus controls an internal combustion engine having electromagnetically driven valves. A target cylinder torque required of one of a plurality of cylinders is individually calculated in accordance with a target engine torque, and a timing for opening and closing each of a plurality of intake and exhaust valves in each of the plurality of cylinders is determined in accordance with the target cylinder torque. Thereby the torque of the internal combustion engine is individually controlled for each of the plurality of cylinders.Type: GrantFiled: March 19, 2001Date of Patent: April 15, 2003Assignee: Toyota Jidosha Kabushiki KaishaInventors: Masaaki Tanaka, Yasushi Ito, Shoji Katsumata, Keiji Yoeda, Hideyuki Nishida, Makoto Ogiso, Isao Matsumoto
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Publication number: 20030066512Abstract: A method for controlling an engine having both an electronically controlled inlet device, such as an electronic throttle unite, and an electronically controlled outlet device, such as a variable cam timing system is disclosed. The method of the present invention achieves cylinder air charge control that is faster than possible by using an inlet device alone. In other words, the method of the present invention controls cylinder air charge faster than manifold dynamics by coordination of the inlet and outlet device. This improved control is used to improve various engine control functions.Type: ApplicationFiled: November 5, 2002Publication date: April 10, 2003Inventors: John David Russell, Allan Joseph Kotwicki, Brian D. Rutkowski
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Patent number: 6516777Abstract: A method of controlling an internal combustion engine having an electromagnetically actuated intake valve for a cylinder.Type: GrantFiled: November 30, 2001Date of Patent: February 11, 2003Assignee: Nissan Motor Co., Ltd.Inventor: Hirofumi Yano
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Patent number: 6502543Abstract: In an intake-air quantity control apparatus for an internal combustion engine equipped with a variable valve timing system associated with at least an intake valve, a throttle valve located upstream of the intake valve, a throttle actuator variably adjusting a throttle opening of the throttle valve, sensors detecting engine operating conditions, an electronic control unit is connected electrically to the sensors, the variable valve timing system, and the throttle actuator, for automatically controlling an intake-air quantity of air entering the engine depending on the engine operating conditions. The control unit calculates a desired intake-air quantity based on the engine operating conditions, and calculates a threshold limit value that corresponds to a lower limit intake-air quantity above which valve timing control of the intake valve enables the intake-air quantity to be brought closer to the desired intake-air quantity.Type: GrantFiled: April 25, 2001Date of Patent: January 7, 2003Assignee: Nissan Motor Co., Ltd.Inventors: Masahiro Arai, Hatsuo Nagaishi