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公开(公告)号：US5937806A
公开(公告)日：1999-08-17
申请号：US41650
申请日：1998-03-13
申请人： Bohdan Michael Lyko , Thomas Howard Lichti , Daniel Richard Cuatt , John S. Lylak, Jr. , Ivan Rafael Samalot
发明人： Bohdan Michael Lyko , Thomas Howard Lichti , Daniel Richard Cuatt , John S. Lylak, Jr. , Ivan Rafael Samalot
CPC分类号： F01L1/344
摘要： Internal combustion engine variable valve timing control with a camshaft phaser for varying rotational phase between a camshaft and a crankshaft in response to a control command determined through a hybrid control strategy without resort to direct temperature measurement. For a range of phase errors requiring high response compensation, a control strategy emphasizing rapid response, such as a bang-bang strategy, is deployed. For a range of phase errors requiring high accuracy compensation, a control strategy emphasizing high precision, such as a proportional-plus-integral strategy, is deployed. The phase error ranges are updated periodically to account for changes in operating conditions. The control command includes an offset which varies in response to a periodically estimated control deadband to affirmatively account for the deadband with each issued control command.
摘要翻译： 内燃机可变气门正时控制，具有用于响应于通过混合控制策略确定的控制命令而在凸轮轴和曲轴之间改变旋转相位的凸轮轴相位器，而不需要直接测量温度。 对于需要高响应补偿的一系列相位误差，部署了强调快速响应的控制策略，例如爆炸策略。 对于需要高精度补偿的一系列相位误差，部署了强调高精度的控制策略，如比例加积分策略。 定期更新相位误差范围，以解决运行条件的变化。 控制命令包括响应于周期性估计的控制死区而变化的偏移，以肯定地说明每个发出的控制命令的死区。
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公开(公告)号：US06863048B2
公开(公告)日：2005-03-08
申请号：US10170851
申请日：2002-06-12
CPC分类号： F02D13/0226 , F02D2009/024 , F02D2013/005 , F02D2041/002 , F02D2250/41 , Y02T10/18
摘要： A vacuum system for an engine with variable valve lift includes a controllable vacuum-forming valve at the entrance to the intake manifold and a programmable engine control module (ECM) to increase vacuum as desired within the manifold by modulating the valve as needed to optimize fuel economy. To provide vacuum brake assist, a brake booster diaphragm is connected conventionally to the manifold and a vacuum storage tank and check valve are disposed between the booster diaphragm and the manifold. During periods of vehicle deceleration, when engine load is low, the ECM may switch the VVL-controlled intake valves to a higher lift to increase the pumping capacity of the engine, while simultaneously partially closing the vacuum-forming valve to create vacuum in the intake manifold, the brake booster, and the vacuum storage tank at little or no expense to engine performance.
摘要翻译： 用于具有可变气门升程的发动机的真空系统包括在进气歧管入口处的可控真空成形阀和可编程发动机控制模块（ECM），以根据需要通过调节阀来优化燃料以在歧管内增加真空 经济。 为了提供真空制动辅助，制动助力隔膜常规地连接到歧管，并且真空储存罐和止回阀设置在增压隔膜和歧管之间。 在车辆减速期间，当发动机负载低时，ECM可以将VVL控制的进气门切换到更高的升力，以增加发动机的泵送能力，同时部分关闭真空成型阀，以在进气口中产生真空 歧管，制动助力器和真空储罐对发动机性能的影响很小或没有任何代价。
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