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Independent compression and expansion ratio engine with variable compression ratio

An engine block, internal combustion engine technology, applied in engine control, machine/engine, mechanical equipment, etc., can solve problems such as limitation and inability to realize the maximum power potential of the engine

Inactive Publication Date: 2017-10-10
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at high loads and high engine speeds, a Miller cycle internal combustion engine with a high compression ratio becomes very limited and cannot realize the maximum power potential of the engine

Method used

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  • Independent compression and expansion ratio engine with variable compression ratio
  • Independent compression and expansion ratio engine with variable compression ratio
  • Independent compression and expansion ratio engine with variable compression ratio

Examples

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Embodiment Construction

[0013] Those of ordinary skill in the art should recognize that the terms "above," "below," "up," "down," "top," "bottom," etc., are used to describe the drawings and do not imply limitations on the scope of the present invention. limitations, the scope of which is defined by the appended claims. Furthermore, the invention may be described herein in terms of functional and / or logical block components and / or various process steps. It should be appreciated that these block components may include any number of hardware, software, and / or firmware components configured to perform the specified functions.

[0014] Referring to the drawings, wherein like numerals represent like parts throughout the several views, in figure 1 and figure 2 The internal combustion engine is indicated generally at 20 . refer to figure 1 and figure 2 , internal combustion engine 20 includes an engine block 22 defining at least one cylinder bore 24 . Although the drawings show only one cylinder bor...

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PUM

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Abstract

An internal combustion engine includes a crankshaft rotatably supported by an engine block, and rotatable about a crank axis. A control shaft is rotatably supported by the engine block, and rotatable about a control axis. A link rod is rotatably connected to the crankshaft. A lower connecting rod includes a first end rotatably connected to the link rod, and a second end rotatably connected to the control shaft. An upper connecting rod is rotatably connected to the link rod and a piston. The second end of the lower connecting rod and the control shaft are rotatably connected at a location offset from the control axis to define an eccentric connection relative to the control axis. Rotation of the control shaft about the control axis rotates the second end of the lower connecting rod about the control axis to adjust a compression stroke length of the piston.

Description

technical field [0001] The present disclosure generally relates to an internal combustion engine. Background technique [0002] Internal combustion engines include pistons that slide within bores of an engine block. The piston reciprocates through at least a compression stroke having a compression stroke length and an expansion stroke having an expansion stroke length. In a standard Otto cycle internal combustion engine, the connecting rod is connected to the crankshaft eccentrically with respect to the crank axis. Connecting rods interconnect the pistons and crankshaft. Rotation of the crankshaft moves the piston through its compression and expansion strokes, the length of the compression stroke being equal to the length of the expansion stroke. [0003] Atkinson cycle internal combustion engines use a linkage system that interconnects the pistons, crankshaft, and parallel control shafts. The unique linkage system of the Atkinson cycle engine makes the compression strok...

Claims

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Application Information

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IPC IPC(8): F02B75/32F02D15/02
CPCF02B75/045F02B75/32F02D15/02
Inventor A·R·查德
Owner GM GLOBAL TECH OPERATIONS LLC
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