公开(公告)号：US20200332733A1

公开(公告)日：2020-10-22

申请号：US16388686

申请日：2019-04-18

Applicant: Caterpillar Inc.

Inventor： Christopher R. Gehrke ,  Anthony T. Petrou ,  David A. Pierpont

IPC: F02D41/04 ,  F02D41/14

Abstract: A system for estimating engine performance is configured to receive, via a cylinder combustion model, a cylinder pressure of a cylinder associated with operation of an internal combustion engine. The system estimates a liner bending moment based at least in part on the cylinder pressure, generates a piston side load associated with the cylinder based at least in part on the liner bending moment, and estimates a piston friction value for a piston associated with the cylinder. The piston friction value may be based at least in part on the cylinder pressure and an engine speed of the internal combustion engine. The system receives, via a convective heat transfer model, an exhaust heat transfer value indicative of a cumulative heat transfer from an exhaust manifold, and estimates an engine torque value based at least in part on the exhaust heat transfer value.

公开(公告)号：US20140158088A1

公开(公告)日：2014-06-12

申请号：US13709486

申请日：2012-12-10

Applicant: CATERPILLAR INC

Inventor： Christopher R. Gehrke ,  Martin Willi

IPC: F02M25/07 ,  F02D41/30

CPC classification number: F02D41/30 ,  F02D19/0692 ,  F02D19/10 ,  F02D41/0025 ,  F02D41/0027 ,  F02D41/0055 ,  F02D41/3094 ,  F02D41/403 ,  F02D2041/0067 ,  F02M26/05 ,  F02M26/25 ,  F02M26/28 ,  F02M26/33 ,  F02M26/47 ,  Y02T10/36 ,  Y02T10/44 ,  Y02T10/47

Abstract: Systems and methods for operating an engine include controlling a temperature of recirculated exhaust gas to achieve a predetermined recirculated exhaust gas temperature. A mixture of air and temperature-controlled recirculated exhaust gas are admitted in a combustion chamber and a gaseous fuel injector delivers gaseous fuel during an intake stroke. A diesel fuel injector is activated for a first time to deliver a pre-pilot diesel quantity directly into the combustion chamber at an early stage of a compression stroke, and is activated again for a second time to deliver a pilot diesel quantity directly into the combustion chamber at a later stage of the compression stroke. A total air/fuel ratio within the combustion chamber upon completion of the second diesel fuel injector activation is lean. The air/fuel mixture is combusted during a combustion stroke, and combustion products are removed during an exhaust stroke.

Abstract translation: 用于操作发动机的系统和方法包括控制再循环废气的温度以实现预定的再循环废气温度。 空气和温度控制的再循环废气的混合物在燃烧室中进入，并且气体燃料喷射器在进气冲程期间输送气体燃料。 柴油燃料喷射器首次被激活以在压缩冲程的早期阶段将预先的先导柴油量直接输送到燃烧室中，并且再次被再次启动以将引燃柴油量直接输送到燃烧 在压缩冲程的后期阶段。 完成第二柴油喷射器启动后燃烧室内的总空气/​​燃料比是稀的。 空气/燃料混合物在燃烧冲程期间燃烧，并且在排气冲程期间除去燃烧产物。