System and method for controlling engine knock

一种发动机、爆震的技术，应用在发动机元件、燃烧发动机、发动机点火等方向，能够解决发动机燃料经济性劣化、发动机爆震、火花提前速率低等问题，达到改善车辆驾驶性能、减少可能性、改善燃料经济性的效果

Active Publication Date: 2017-12-19
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Advancing spark timing after retarding spark timing can lead to a further indication of engine knock if the spark advance rate is too high
On the other hand, if the spark advance rate is too low, engine fuel economy can degrade

Method used

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  • System and method for controlling engine knock
  • System and method for controlling engine knock
  • System and method for controlling engine knock

Examples

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Embodiment Construction

[0061] The present description relates to systems and methods for selectively activating and deactivating cylinders and cylinder valves of an internal combustion engine. The engine can be as Figure 1A to Figure 6D Configure and operate as shown. Various methods and predictive operating sequences for engines involving deactivated valves are in Figure 7 to Figure 42 shown in . Different approaches can work together and with Figure 1A to Figure 6D The system shown operates together.

[0062] refer to Figure 1A , an internal combustion engine 10 comprising a plurality of cylinders, one of which is at Figure 1A shown in . Engine 10 is comprised of cylinder head casting 35 and cylinder block 33 which includes combustion chamber 30 and cylinder walls 32 . Piston 36 is positioned therein and reciprocates via a connection with crankshaft 40 . Flywheel 97 and ring gear 99 are coupled to crankshaft 40 . A starter 96 (eg, a low voltage (operating at less than 30 volts) motor) ...

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Abstract

Systems and methods for controlling knock in an internal combustion engine are presented. In one example, spark timing is retarded in engine cylinders where engine knock is indicated and spark is subsequently advanced after it has been retarded. The rate spark timing is advanced may be based on a way engine cylinders have been deactivated.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Patent Application Serial No. 62 / 347,841, filed June 9, 2016. The entire content of the above application is hereby incorporated by reference in its entirety for all purposes. technical field [0003] The present description relates to systems and methods for controlling knock of an internal combustion engine. The systems and methods are applicable to engines that include engine cylinder deactivation. Background technique [0004] Engines may include knock control systems for mitigating engine knock. The knocking system retards the spark timing of the cylinders that are knocking to reduce the potential for engine degradation. The cylinder's spark timing may then be advanced while suppressing knock to increase engine efficiency. The advance rate of the spark is a constant value. If the spark advance rate is too high, then advancing the spark timing after retarding ...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): F02P5/152F02D17/02F02D35/02
CPCF02D17/02F02D35/026F02D35/027F02P5/1522F02D35/025F02D37/02F02D41/0087F02D41/3094F02D2200/1002F02D2200/101F02P5/045F02P5/1523F02P5/1528Y02T10/40F02D17/04
InventorC·P·格卢格拉
OwnerFORD GLOBAL TECH LLC