A method for detecting a closing moment of a valve having a coil drive includes impressing an electrical voltage in the exciter coil to generate an exciter current through the coil, which attracts the movable armature and lifts the valve element off its valve seat. After the exciter current decays to zero, the voltage profile at the exciter coil is sampled and read out over time in the form of time value/voltage value pairs. The detected voltage values and time valves are transformed by the formation of a logarithm to form a transformed function. The transformed function is subsequently derived numerically with the formation of a derivation function. A transformed time value corresponding to the valve closing moment is detected based on the derivation function of a predetermined threshold value S being undershot, and the closing moment is calculated therefrom by inverse transformation.

Method for detecting a closing time point of a valve having a coil drive, and valve

A method for controlling an electromagnetically-activated fuel injector includes determining an injector activation signal having an injection duration, an initial peak pull-in current and a secondary hold current corresponding to a preferred injected fuel mass for a fuel injection event associated with a non-monotonic region of injector operation, and controlling the fuel injector using the injector activation signal to achieve the preferred injected fuel mass for the fuel injection event.

Method for controlling a fuel injector

A system for a vehicle includes a filtering module and an indicated work module. The filtering module generates engine speeds based on positions of teeth of a toothed wheel that rotates with a crankshaft and based on a crankshaft position signal generated by a crankshaft position sensor. The crankshaft position sensor generates the crankshaft position signal based on rotation of the toothed wheel. The indicated work module generates an indicated work for a combustion cycle of a cylinder of an engine based on squares of first and second ones of the engine speeds and outputs the indicated work.

Systems and methods for determining crankshaft position based indicated mean effective pressure (imep)

A method for controlling a vehicle, including determining a speed curve on a coasting route, in order to let the vehicle on the coasting route coast from an actual speed to a setpoint speed, detecting an additional vehicle approaching the vehicle from behind on the coasting route, and raising the speed of the vehicle compared to the determined speed behavior on the coasting route, in order to produce a predetermined threshold distance from the additional vehicle.

Method for operating a vehicle during coasting

Provided is a high-pressure fuel supply device for an internal combustion engine, said device being capable of suppressing noise from collisions of a plunger rod and an air intake valve A high-pressure fuel pump 108 comprises an intake valve, a plunger rod that is formed as a separate element from the intake valve, an elastic member that biases the plunger rod in the valve-opening direction of the intake valve, and a solenoid that draws the plunger rod in the valve-closing direction of the intake valve when supplied with electricity A control device 101 has a first control unit that applies a first current to the solenoid in order to close the intake valve, and a second control unit that applies a second current to the solenoid before the plunger rod collides with the intake valve due to the biasing force of the elastic member

High-pressure fuel supply device for internal combustion engine

The method involves determining a correction value for a partial injection into an individual cylinder of an internal-combustion engine by stimulation of two injecting samples. A physical variable determined from a speed signal of the internal-combustion engine is provided for combustion characteristics. Values are determined from the speed signal of the internal-combustion engine for physical energy and/or work converted during a single injection and multiple injections that comprise the partial injection. Independent claims are also included for the following: (1) a device for calibrating an injection amount of a partial injection in an injection system of an internal-combustion engine (2) a computer program comprising a set of instructions for performing a method for calibrating an injection amount of a partial injection in an injection system of an internal-combustion engine.

Injection amount calibrating method for injection system of internal-combustion engine of motor vehicle, involves providing physical variable determined from speed signal of internal-combustion engine for combustion characteristics

The invention relates to a method for operating an internal combustion engine comprising at least two cylinders in at least two modes of operation, all cylinders being fired in a first mode of operation and only some cylinders being fired in a second mode of operation In said method, an actual cumulative lambda value of the internal combustion engine is adjusted to a desired cumulative lambda value using a lambda controller by adjusting the amount of fuel and/or air delivered to the fired cylinders At least in the second mode of operation, an individual corrective factor for correcting the amount of fuel and/or air delivered to each fired cylinder is determined and stored for each fired cylinder in order to adjust an actual individual lambda value of the respective cylinder to a desired individual lambda value, the stored individual corrective factors being applied to the fired cylinders when switching from the first to the second mode of operation

Method and device for operating an internal combustion engine

In a method for cylinder equalization of a lambda-controlled internal combustion engine of a motor vehicle, cylinders to be tested are trimmed with respect to the mixture composition of metered fuel, and the cylinder equalization is carried out on the basis of an uneven running or uneven running change of the internal combustion engine caused by the trimming. In addition, the uneven running or uneven running change is detected in a reference state of the internal combustion engine. The uneven runnings or uneven running changes detected during successive trimmings of the cylinders to be tested are and compared to the uneven running values detected in the reference state.

Method for cylinder equalization of a lambda-controlled internal combustion engine, in particular of a motor vehicle

Die vorliegende Erfindung betrifft ein Verfahren zur Zylindergleichstellung einer lambdageregelten Brennkraftmaschine insbesondere eines Kraftfahrzeugs, bei dem zu prufende Zylinder bezuglich der Gemischzusammensetzung von zugemessenem Kraftstoff vertrimmt werden, wobei die Zylindergleichstellung auf der Grundlage einer durch die Vertrimmung bewirkten Laufunruhe oder Laufunruheanderung der Brennkraftmachine erfolgt, und wobei insbesondere vorgesehen ist, dass die Laufunruhe bzw. Laufunruheanderung in einem Referenzzustand der Brennkraftmaschine erfasst wird, dass die bei einer aufeinanderfolgenden Vertrimmung der zu prufenden Zylinder erfassten Laufunruhen bzw. Laufunruheanderungen erfasst werden, und dass die im Referenzzustand und bei den Vertrimmungen erfassten Laufunruhewerte verglichen werden.

Verfahren zur Zylindergleichstellung einer lambdageregelten Brennkraftmaschine insbesondere eines Kraftfahrzeugs

The present invention relates to a method for operating an internal combustion engine (10), wherein the cylinders (12a,12b,12c,12d) are balanced through analyzing a torque (33) at a state that the cylinders respectively dilute the mixed air, wherein, the method comprises the following steps: (a) diluting the mixed air in a first cylinder (12a) to a preset dilution value (34); (b) at a state that a practical rotation speed signal (19) is applied, calculating out a first parameter (50) which represents the characteristic of a practical torque (46) of the first cylinder (12a); (c) at a state the preset dilution value (34) is applied, calculating out a second parameter (54) which represents the characteristic of a rated torque (44) of the first cylinder (12a); and (d) matching an amount (31) of the fuel which is inputted into the first cylinder (12a) according to a difference (48) between the first parameter (50) and the second parameter (54).

Method for operating internal combustion engine

Popular Tasks used by Researchers

How can I help with your research?

Get more enhanced response by uploading the PDFs you want me to reference.

No relevant PDFs in your library

SciSpace is the AI research assistant for academics. Run systematic literature reviews on 280M+ papers, and write papers with cited sources. Trusted by 1M+ students, PhDs & researchers.

SciSpace | AI for Research

We encountered an error while loading the panel. Please try refreshing the page.

Something went wrong

Analyze PDFs

Code & Manuscripts

Funding & Grants

Literature & Patents

Medical & Clinical Data

Systematic Review

Visualize & Present

Web & Data

Build a Google Scholar-like website for your research.

Build a website

Create charts and images for your research

Create a Chart

Write a paper for submission to a journal

Draft a manuscript

Patent Search

Design eye-catching scientific posters in minutes.

Scientific Poster Generation

Systematic Literature Review

Anyone with the link can view this chat. You can switch it back to private anytime.

One task is running at the moment. Your messages will be shown right after.

Drag and drop or click here to browse

Loved by <highlight>1 million+</highlight> researchers

Extract a list of specific topics and their sources from unstructured text

Topics

Compare and analyze relevant papers that matches with your search

Papers

Get insights from PDFs and bookmarked papers from your library

My library

Recent searches

Try searching for:

Catch AI-generated content in scholarly and non-scholarly content

{ai} Detector

Ai Writer

Get PDF Summaries, highlighted text explanations 

Chat with PDF

Effortlessly create in-text citations and bibliographies in APA and 2,500 other formats

Citation generator

Get explanations, summaries, and answers on academic papers

Ease up your research workflow with {scispace}'s cohort of exciting AI tools

Elevate your academic writing skills and convey your ideas the way you want

Paraphraser

Explore our range of reading and writing tools

Your file is being prepared and should be ready in a few minutes. If it's a large file, it might take a bit longer. You can close this window, and we'll email you the file when it's done.

You have reached a maximum limit of <strong>{limit}</strong> columns in the table. Remove at least <strong>1</strong> column to add or create another one.

Wolfgang Tiebel

Author Tools

Chat about Author