公开(公告)号：US09429101B2

公开(公告)日：2016-08-30

申请号：US14331374

申请日：2014-07-15

Applicant: Caterpillar Inc.

Inventor： Robert Nacke ,  Stuart Niese ,  Aaron Ness ,  Fabio Menotti ,  Chris Hoops ,  Andrew Gaarder

IPC: F02F3/26 ,  F02B23/06

CPC classification number: F02F3/26 ,  F02B23/0636 ,  Y02T10/125

Abstract: A piston for an internal combustion engine is disclosed. The piston includes an upper surface configured to at least partly face a cylinder head of the internal combustion engine. The upper surface includes a combustion bowl surface, and a squish face having an internal edge disposed a first distance from the longitudinal axis along a radial direction. The combustion bowl surface includes a planar surface extending radially outward from the longitudinal axis of the piston, a first concave surface disposed outside the planar surface in the radial direction, the first concave surface having a first radius of curvature, and a second concave surface disposed outside the first concave surface in the radial direction, the second concave surface having a second radius of curvature, the second radius of curvature being smaller than the first radius of curvature.

Abstract translation: 公开了一种用于内燃机的活塞。 活塞包括构造成至少部分地面对内燃机的气缸盖的上表面。 上表面包括燃烧碗表面和具有沿着径向方向设置在距纵向轴线第一距离的内边缘的挤压面。 燃烧碗表面包括从活塞的纵向轴线径向向外延伸的平坦表面，在径向方向上设置在平坦表面外侧的第一凹面，第一凹面具有第一曲率半径，第二凹面设置 在第一凹面的径向外侧，第二凹面具有第二曲率半径，第二曲率半径小于第一曲率半径。

公开(公告)号：US11035334B1

公开(公告)日：2021-06-15

申请号：US16900422

申请日：2020-06-12

Applicant: Caterpillar Inc.

Inventor： James Jay Cress ,  Chris Hoops

IPC: F02P15/08 ,  F02P15/12 ,  F02B19/12 ,  F02P17/00 ,  F02P9/00 ,  F02B19/18 ,  F02P5/15

Abstract: An ignition system for an engine includes a sparkplug, ignition circuitry electrically connected to the sparkplug, and an ignition control unit structured to energize the ignition circuitry to fire the sparkplug at an ignition timing, detect a fault condition caused by an abnormal response of the sparkplug to the energizing, and to energize the ignition circuitry to dry fire the sparkplug at an offset timing such as during an exhaust, stroke based on the detection of the fault condition. Dry firing the sparkplug reduces a break down voltage required to subsequently fire the sparkplug and extends sparkplug service life.

公开(公告)号：US20150053167A1

公开(公告)日：2015-02-26

申请号：US14331374

申请日：2014-07-15

Applicant: Caterpillar Inc.

Inventor： Robert Nacke ,  Stuart Niese ,  Aaron Ness ,  Fabio Menotti ,  Chris Hoops ,  Andrew Gaarder

IPC: F02F3/26

CPC classification number: F02F3/26 ,  F02B23/0636 ,  Y02T10/125

Abstract: A piston for an internal combustion engine is disclosed. The piston includes an upper surface configured to at least partly face a cylinder head of the internal combustion engine. The upper surface includes a combustion bowl surface, and a squish face having an internal edge disposed a first distance from the longitudinal axis along a radial direction. The combustion bowl surface includes a planar surface extending radially outward from the longitudinal axis of the piston, a first concave surface disposed outside the planar surface in the radial direction, the first concave surface having a first radius of curvature, and a second concave surface disposed outside the first concave surface in the radial direction, the second concave surface having a second radius of curvature, the second radius of curvature being smaller than the first radius of curvature.

Abstract translation: 公开了一种用于内燃机的活塞。 活塞包括构造成至少部分地面对内燃机的气缸盖的上表面。 上表面包括燃烧碗表面和具有沿着径向方向设置在距纵向轴线第一距离的内边缘的挤压面。 燃烧碗表面包括从活塞的纵向轴线径向向外延伸的平坦表面，在径向方向上设置在平坦表面外侧的第一凹面，第一凹面具有第一曲率半径，第二凹面设置 在第一凹面的径向外侧，第二凹面具有第二曲率半径，第二曲率半径小于第一曲率半径。