Class 123/346 - Intake valve lift altered

Subclass of Class 123 - Internal-combustion engines
Definition: Subject matter in which the regulated valve is the mixture
No. of patents: 35
Last issue date: 04/03/2012

Number	Title	Issue Date
8146567	Two-step valve lifter control systems and methods A valve lifter control system includes a valve lifter control module and a forced transition determination module. The valve lifter control module determines a desired lift state of a valve lifter based on at least one of engine speed and engine load. The forced tra...	04/03/2012
7938100	Variable valve device for engine A variable valve device, which is capable of controlling a fuel injection amount or the like if a control shaft sensor has a failure, uses a brushless DC motor to rotate the control shaft, detects the rotation angle of the motor using its magnetic pole sensors, and ...	05/10/2011
7836863	Variable valve lift apparatus of engine for vehicles A variable lift apparatus of an engine for a vehicle may include a camshaft in which a cam is formed, a swing arm one side of which is supported by a supporting portion and another side of which operates a valve, an output arm including a roller press portion extend...	11/23/2010
7806105	Idle speed control apparatus for internal combustion engine When it is determined that an engine speed NE rapidly decreases (positive outcome at S210), a throttle increase amount TAu and a valve lift increase amount VLu are computed based on a decrease rate NEd of the engine speed NE (S220). Then, a target thro...	10/05/2010
7770558	Intake air control system for internal combustion engine An intake air control system for an internal combustion engine having at least one intake valve and a valve operating characteristic varying mechanism which continuously varies a lift amount of the at least one intake valve of the engine. A target intake air flow ra...	08/10/2010
7441522	Valve characteristic control device for internal combustion engine and method of the same A lift time area is calculated based on an actual valve working angle of an intake valve and an engine rotational speed. Then, a control gain of a feedback control is set based on the lift time area. ...	10/28/2008
7373922	Intake air amount control apparatus and intake air amount control method of internal combustion engine 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 e...	05/20/2008
7363889	Control device for multicylinder internal combustion engine A control device of a multicylinder internal combustion engine provided with a valve operating characteristic control means for controlling a valve operating characteristic of at least one of an intake valve and exhaust valve, which estimates an intake difference of...	04/29/2008
7360515	Control apparatus for an internal combustion engine A variable valve mechanism performs a valve lift switching operation for an intake valve. ECU defines valve lift switching characteristics corresponding to the engine operating region and executes the valve lift switching operation based on the switching characteris...	04/22/2008
7357119	Variable valve type internal combustion engine and control method thereof The operation modes of plural intake valves 7a and 7b provided in one cylinder is independently changed according to the drive region of the internal combustion engine. In the low air amount region, the intake airflow is controlled only w...	04/15/2008
7328683	Method and device for controlling the transition in a direct injection internal combustion engine During the changeover from a first operating mode of a spark-ignition engine with direct fuel injection to a second operating mode, in particular between a homogeneous stoichiometric and homogeneous lean, stratified or HCCI operation with changeovers of the valve st...	02/12/2008
7308873	Variable valve control system for internal combustion engine A variable valve control system for an internal combustion engine, includes a valve to open and close an opening of a combustion chamber of the engine, a variable lift characteristic control mechanism to adjust a valve lift characteristic of the valve, a sensing sec...	12/18/2007
7305945	Method for changing the lift of an inlet valve of an internal combustion engine In a method for changing the lift of inlet valves of an internal combustion engine between a partial lift and a full lift, the lift of the inlet valves being controlled by at least one camshaft, which comprises partial lift cams and full lift cams acting alternative...	12/11/2007
7273026	Roller follower body The present invention relates to a roller follower, comprising an outer surface, enclosing a first cavity, a second cavity, and a transition opening, wherein the first cavity includes a first inner surface configured to house a cylindrical insert the second cavity i...	09/25/2007
7240664	Variable valve type internal combustion engine and control method thereof The operation modes of plural intake valves 7a and 7b provided in one cylinder is independently changed according to the drive region of the internal combustion engine. In the low air amount region, the intake airflow is controlled only w...	07/10/2007
7237530	Control apparatus of internal combustion engine 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 amoun...	07/03/2007
7222594	Control apparatus for an internal combustion engine A variable valve mechanism performs a valve lift switching operation for an intake valve. ECU defines valve lift switching characteristics corresponding to the engine operating region and executes the valve lift switching operation based on the switching characteris...	05/29/2007
7219004	Adaptive control for engine with electronically adjustable valve operation 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 engin...	05/15/2007
7194998	Control apparatus and control method for internal combustion engine In an control apparatus and a control method for an internal combustion engine with a variable valve-characteristic mechanism that changes a valve characteristic that includes at least one of the duration and the maximum lift of an intake valve, the operating positi...	03/27/2007
7128051	Internal combustion engine, and control apparatus and method thereof 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 ai...	10/31/2006
7107948	Engine system and vehicle An engine system includes an engine and an engine control unit. The engine includes an intake valve that opens and closes the opening of a cylinder, a valve actuator that drives the intake valve and can arbitrarily control the lift amount of the intake valve, an int...	09/19/2006
7063057	Method for effectively diagnosing the operational state of a variable valve lift device A method for diagnosing the operational state of a variable valve lift device (VVL) is provided. The method includes providing a first signal indicative of an estimated position of the VVL, the first signal having a first signal-to-noise ratio; determining that the ...	06/20/2006
7017551	Intake control apparatus for internal combustion engine and method thereof When a detection value of an intake pressure is normal, an electronically controlled throttle is controlled to attain a target intake pressure, a variable valve mechanism is controlled to attain a target intake air amount, and the control of the variable valve mecha...	03/28/2006
7013211	Variable valve control apparatus for internal combustion engine and method thereof A requested volume flow ratio calculated based on a requested torque, an amount of two times a spit-back gas amount at the valve overlap time calculated based on a requested residual gas rate, and a spit-back gas amount of the time when an intake valve is closed are...	03/14/2006
6948358	Method for diagnosing incorrect valve lift adjustment in an internal combustion engine If, when a valve lift adjustment is triggered in an inlet valve of an internal combustion engine, no valve lift adjustment actually takes place due to a defect in the adjustment mechanism, the air/fuel ratio (lambda) or even a different operating parameter for examp...	09/27/2005
6945224	Intake air amount control apparatus for vehicle engine and method thereof In a control apparatus for controlling an intake air amount of an engine by variably controlling a lift amount of an intake valve, when a variable valve lift mechanism is failed, the control is switched to a control of the intake air amount based on an opening degre...	09/20/2005
6920848	Driver or direct acting valve for internal combustion engine It is an object of the present invention to provide a drive unit for a direct-acting valve for internal combustion engines by which a quiet internal combustion engine can be obtained with noise suppressed. This system comprises an inlet valve 8 arranged slida...	07/26/2005
6863050	Apparatus and method for controlling intake air amount of internal combustion engine In an internal combustion engine provided with a variable valve mechanism that varies at least a valve operating characteristic (valve lift amount and the like) of an intake valve, a target intake air amount equivalent to a target torque is set based on operating co...	03/08/2005
6843226	Intake control apparatus for internal combustion engine An intake control apparatus is configured to control a variable valve operating mechanism and an opening degree of a throttle valve. The variable valve operating mechanism varies the valve lift characteristic of the intake valves to control the intake air amount int...	01/18/2005
6728627	Apparatus and method for measuring intake air flow amount of internal combustion engine In an internal combustion engine provided with a variable valve mechanism that varies a valve operating characteristic of an intake valve, the valve operating characteristic of the intake valve is detected, and a flow loss coefficient and an effective opening area o...	04/27/2004
6371065	Control method of an internal combustion engine A control method of an internal combustion engine with which braking force while reducing the speed of the motor vehicle can be established by generating pumping loss effectively by using a variable valve mechanism enabling to control arbitrarily the open...	04/16/2002
6182621	Method of affecting mixture formation and charge motion in an engine cylinder A method of affecting a mixture formation and motion of a charge in a cylinder of an externally ignited internal-combustion engine during a suction cycle of a gas intake valve of the cylinder. The suction cycle has a first cycle portion and a second cycle...	02/06/2001
6155217	Control method of an internal combustion engine A control method of an internal combustion engine with which braking force while reducing the speed of the motor vehicle can be established by generating pumping loss effectively by using a variable valve mechanism enabling to control arbitrarily the open...	12/05/2000
4556027	Exhaust braking system for an internal combustion engine An exhaust braking system used with an internal combustion engine has an inlet valve an exhaust valve, an exhaust brake connected in an exhaust system connected with the exhaust valve, and an actuator connected in a fluid circuit with the exhaust brake. T...	12/03/1985
4174683	High efficiency variable expansion ratio engine A variable expansion ratio internal combustion engine equipped with throttleless induction control and intake valve mechanism operable to induct an ambient pressure charge varying with load demand. Maximum compression pressure is preferably somewhat below...	11/20/1979

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Class 123/346 - Intake valve lift altered