Unlock instant, AI-driven research and patent intelligence for your innovation.

System and method for adaptive control of variable valve lift tappet transformation

A valve and lift technology, applied in engine control, internal combustion piston engine, engine components, etc., can solve problems such as impact, engine misfire, etc.

Inactive Publication Date: 2008-11-26
FORD GLOBAL TECH LLC
View PDF1 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, external conditions, such as humidity or altitude, can also affect the response time of the tappet change sequence required to switch combustion modes between different combustion modes, such as spark ignition and compression ignition
Finally, errors in tappet switching can create unwanted combustion patterns in the cylinders and can cause the engine to misfire, for example in compression ignition mode

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • System and method for adaptive control of variable valve lift tappet transformation
  • System and method for adaptive control of variable valve lift tappet transformation
  • System and method for adaptive control of variable valve lift tappet transformation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] Figure 1 shows one cylinder of a multi-cylinder engine, and the intake and exhaust paths connected to the cylinder. Continuing with FIG. 1 , a direct injection internal combustion engine 10 including a plurality of combustion chambers is controlled by an electronic engine controller 12 . Combustion chamber 30 of engine 10 is shown including combustion chamber walls 32 with piston 36 positioned therein and connected to crankshaft 40 . A starter motor (not shown) may be coupled to crankshaft 40 via a flywheel (not shown). Combustion chamber or cylinder 30 is shown communicating with intake manifold 44 and Exhaust manifold 48 communicates. Fuel injector 66A is shown coupled directly to combustion chamber 30 to supply injected fuel directly therein in proportion to a signal pulse width fpw received from controller 12 via electronic driver 68 . The fuel injectors may be mounted, for example, on the side walls of the combustion chamber, or at the top of the combustion cham...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A method for controlling the exchange of an air cylinder valve between a first valve state and a second valve state so as to carry out conversion between the combustion modes of an engine includes: responding to the information from a combustion sensor and adjusting the timing of a signal used for carrying out conversion between the valve states; wherein, the combustion modes include spark ignition and homogeneous charging compression ignition.

Description

technical field [0001] The present invention relates to systems and methods for controlling variable valve lift lifter switching during switching combustion modes. Background technique [0002] Engines may use various cylinder intake and / or exhaust valve profiles to improve engine operation over a range of conditions. For example, engines may use variable valve timing, cam profile shifting, and other methods to provide different valve operations. Switching between the different valve profiles is typically controlled by hydraulic lines, which may have variable delays. These delays may result in valve operation that differs from that required for a given combustion event. [0003] A method of considering oil path delay for changing valve characteristics is described in US Pat. No. 6,330,869, in which combustion before and after switching valve operation is spark ignition combustion. In this reference, the hydraulic valve characteristic of the valve driving device is detecte...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): F02D13/02F01L13/00F01L1/34
CPCY02T10/18Y02T10/12
Inventor 塞米·腓利门·佩特里迪斯
Owner FORD GLOBAL TECH LLC