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Methodology to compensate the effect of humidity and altitude on hcci combustion

A fuel ratio, internal combustion engine technology, used in combustion engines, fuel injection devices, internal combustion piston engines, etc., can solve problems such as changes in oxygen quality

Inactive Publication Date: 2013-01-23
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is also known that the in-cylinder oxygen quality may vary, for example when altitude changes

Method used

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  • Methodology to compensate the effect of humidity and altitude on hcci combustion
  • Methodology to compensate the effect of humidity and altitude on hcci combustion
  • Methodology to compensate the effect of humidity and altitude on hcci combustion

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Embodiment Construction

[0057] Referring now to the accompanying drawings, which are depicted for the purpose of illustrating certain exemplary embodiments only and not for the purpose of limiting these exemplary embodiments, FIG. 1 schematically shows a An exemplary internal combustion engine 10 and accompanying control module 5 are shown. Engine 10 is selectively operated in a number of combustion modes, including a controlled auto-ignition (HCCI) combustion mode and a homogeneous spark-ignition (SI) combustion mode. Engine 10 is selectively operable at a stoichiometric air-fuel ratio, or at an air-fuel ratio primarily on the lean side of stoichiometry. It is to be understood that the concepts of the present invention can be applied to other internal combustion engine systems and combustion cycles.

[0058] In one embodiment, the engine 10 is coupleable to a transmission arrangement for transferring tractive power to the vehicle's driveline. The transmission can include a hybrid transmission incl...

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Abstract

A method for controlling combustion in a spark-ignition direct-injection internal combustion engine includes monitoring an engine operating mode and an ambient parameter, determining a deviation of the ambient parameter relative to a nominal ambient parameter, determining a nominal desired engine operation parameter based on engine speed and load, determining and adjusted desired engine operation parameter based on the nominal desired engine operation parameter and said deviation of the ambient parameter, and controlling the engine based on the engine operating mode and one of the nominal desired engine operation parameter and adjusted desired engine operation parameter.

Description

technical field [0001] The present invention relates to the operation and control of homogeneous charge compression ignition (HCCI) engines. Background technique [0002] The statements in this section merely provide background information related to the present disclosure. Accordingly, this content is not intended to constitute an admission of prior art. [0003] Internal combustion engines, especially automotive internal combustion engines, generally fall into one of two categories, namely, spark-ignition engines and compression-ignition engines. Conventional spark ignition engines (eg, gasoline engines) typically operate by introducing a fuel / air mixture into a combustion cylinder, which is then compressed during the compression stroke and ignited by a spark plug. Conventional compression ignition engines (eg, diesel engines) typically operate by introducing or injecting pressurized fuel into the combustion cylinder near top dead center (TDC) of the compression stroke, ...

Claims

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Application Information

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IPC IPC(8): F02D45/00
CPCF02D41/3041Y02T10/128F02D13/02F02D41/0002F02D2041/001Y02T10/42F02D41/0057F02D2200/0418F02D41/1454F02D41/006F02D41/3035F02M2025/0763F02D2200/704Y02T10/47F02D45/00F02M2025/0762F02D41/144F02M2026/004F02M2026/005F02D2200/703Y02T10/12Y02T10/40
Inventor H.允N.威尔穆特P.M.纳特J-M.康C-F.常
Owner GM GLOBAL TECH OPERATIONS LLC
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