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Method of starting a spark ignition direct injection engine

A technology of engine and engine speed, applied in the direction of engine control, machine/engine, mechanical equipment, etc., can solve the problems of increasing engine manufacturing cost and failing to meet fuel requirements

Active Publication Date: 2015-07-29
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fuel pump of the SIDI engine may not be able to meet the fuel requirements when the engine is cold started
A fuel pump with a larger capacity would improve the cold start performance of the SIDI engine but at the same time increase the manufacturing cost of the engine

Method used

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  • Method of starting a spark ignition direct injection engine
  • Method of starting a spark ignition direct injection engine
  • Method of starting a spark ignition direct injection engine

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Embodiment Construction

[0012] The following description is merely exemplary in nature and is not intended to limit the invention, application or uses. It should be understood that like reference numerals are used throughout the drawings to identify like components and features. As used herein, the term "module" refers to an application-specific integrated circuit (ASIC), an electronic circuit, a processor (shared, dedicated or clustered) and memory that executes one or more software or firmware programs, combinational logic circuits, and / or other suitable components for providing the described functions.

[0013] During a cold start, a SIDI engine system according to the present invention determines a requested fuel flow and deactivates at least one engine cylinder based on the requested fuel flow and a maximum fuel flow of a fuel pump that supplies high pressure fuel to a fuel rail. As the number of activated cylinders decreases, the fuel pump supplies more fuel to the activated cylinders to meet ...

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PUM

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Abstract

A cold start control module for a direct injection engine includes a fuel flow determination module and a cylinder activation / deactivation module. The fuel flow determination module determines a requested fuel flow. The cylinder activation / deactivation module deactivates at least one of cylinders when the requested fuel flow exceeds a maximum fuel flow of the fuel pump during cold start.

Description

technical field [0001] The present invention relates to spark ignition direct injection (SIDI) engines, and more particularly to a method of starting a SIDI engine. Background technique [0002] The background description provided herein is for the purpose of generally presenting the context of the invention. Neither the work of the presently named inventors (to the extent described in the Background section), nor any aspect of the specification that is prior art at the filing date, either expressly or implicitly, should be considered to be in conflict with the present invention. have technology. [0003] Spark ignition direct injection (SIDI) engines have improved fuel economy and increased power over conventional port injection internal combustion engines. The fuel injection system of a SIDI engine operates at high pressure to spray fuel directly into the combustion chamber. A fuel pump for supplying fuel at high pressure to the fuel rail may be mechanically driven by t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/06F02D17/02
CPCF02D17/02F02D41/064F02D41/30F02D13/06F02D41/0087
Inventor J·M·格威德特M·N·科特索纳斯R·X·蒙香普K·M·-B·格威德特
Owner GM GLOBAL TECH OPERATIONS LLC