This disclosure provides a control device for a diesel engine. When the engine is within a particular operating range with a low engine speed and a partial engine load and in a low temperature state where a cylinder temperature at a compression stroke end is lower than a predetermined temperature, a forced induction system sets a forcibly inducting level higher than a predetermined level that is higher than that in a high temperature state where the cylinder temperature is above the predetermined temperature. At least within the particular operating range, an injection control module performs a main injection where a fuel injection starts at or before a top dead center of the compression stroke to cause main combustion mainly including diffusion combustion and performs a pre-stage injection where the fuel injection is performed at least once prior to the main injection to cause pre-stage combustion before the main combustion starts.

Method and device for controlling diesel engine with forced induction system

A method for determining a fuel mass of a single injection that has been injected into at least one combustion chamber of a combustion engine with at least one injection under high pressure. The method includes determining a correction variable for the single injection with the aid of a comparison of a measure for the actual amount of the injected fuel of at least one test injection, which takes place due to a measure for a default nominal amount of a desired single injection, and a measure for the nominal amount of the test injection. The method additionally includes executing a plurality of timely directly successive test injections.

Procedure for determining the injected fuel mass of a single injection and device for implementing the procedure

A controller for a common-rail injection system includes a plurality of fuel injectors, a common fuel supply line for the fuel injectors, a high-pressure pump for supplying the common fuel supply line with fuel, and a pressure sensor for determining the pressure in the common fuel supply line. A determination unit evaluates data of the pressure sensor and, from the pressure drop caused by an injection in the common fuel supply line, determines the fuel quantity actually injected during this injection or a value derived therefrom. An adaption unit uses the results of the determination unit in order to adapt the actuation of the fuel injectors. The determination unit carries out at least one test injection, and the actually injected fuel quantity or a value derived therefrom is effected by way of the test injection or injections.

Controller for a Common-Rail Injection System

A fuel injection control device is a control device controlling an injection of fuel by a fuel injector and includes: a setting part that sets a request injection quantity of an injection quantity requested of the fuel injector; a dividing part that divides the request injection quantity set by the setting part into a specified injection quantity and an adjusting injection quantity other than the specified injection quantity; an injection performing part that performs a dividing injection of an adjusting injection and a partial lift injection by the fuel injector, the adjusting injection injecting the adjusting injection quantity of fuel, the partial lift injection finishing a lift of a valve body of the fuel injector in a partial lift state before the valve body reaching a full lift position and injecting the specified injection quantity of fuel; and a learning part that learns an injection characteristic of the fuel injector at the time of the partial lift injection

Fuel injection control device

In an apparatus, an actual fuel spray characteristic obtaining unit obtains, based on an operation of a learning fuel injection instructing unit in a learning mode, an actual fuel spray characteristic of an injector relative to a variable of a target interval period within at least one section in a usable range therefor. A phase difference calculating unit calculates a phase difference between a reference fuel spray characteristic and the obtained actual fuel spray characteristic. A phase correcting unit shifts the reference fuel spray characteristic by the calculated phase difference such that the reference fuel spray characteristic is corrected to approach the obtained actual fuel spray characteristic.

Apparatus for controlling quantity of fuel to be actually sprayed from injector in multiple injection mode

A fuel injection control device for performing injection control of an injector has a program for performing fuel injection of a predetermined injection quantity (a small quantity) with an injector based on establishment of a first permission condition during fuel cut of the engine and for acquiring a fuel injection quantity indicating a fuel injection characteristic of the injector and a program for performing fuel injection of a predetermined injection quantity (a small quantity) with the injector based on establishment of a second permission condition during idling of the engine and for acquiring a fuel injection quantity indicating the fuel injection characteristic of the injector. Thus, the fuel injection control device and an engine control system including the fuel injection control device can suitably sense the fuel injection characteristic of the injector.

Fuel injection control device and engine control system

A fuel injection control device for performing injection control of an injector (20) has a program (S23, S24, S25) for performing fuel injection of a predetermined injection quantity (a small quantity) with an injector (20) based on establishment of a first permission condition during fuel cut of the engine and for acquiring a fuel injection quantity indicating a fuel injection characteristic of the injector (20) and a program (S23, S24, S25) for performing fuel injection of a predetermined injection quantity (a small quantity) with the injector (20) based on establishment of a second permission condition during idling of the engine and for acquiring a fuel injection quantity indicating the fuel injection characteristic of the injector (20). Thus, the fuel injection control device and an engine control system including the fuel injection control device can suitably sense the fuel injection characteristic of the injector (20).

Fuel injection quantity learning control device and engine control system

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Fuel injection control device and engine control system

Fuel injection quantity learning control device and engine control system