METHOD AT FUEL INJECTION

A method is disclosed to determine the opening degree of injectors in cylinders in a combustion engine with at least three cylinders, wherein the injectors are connected to a fuel accumulator in a common rail fuel injection system, the fuel supply to the fuel accumulator is interrupted, and subsequently a test injection of fuel is carried out into at least two and at most all except one cylinder at a time, in different combinations, at such a time that the injection does not cause any combustion in the cylinders. The pressure decreases caused in connection with the different test injections are measured, and the pressure decrease which is attributable to at least one specific injector is calculated based thereupon, which is used in the determination of the injector's opening degree. 1. Method to determine the opening degree of injectors in cylinders in a combustion engine with at least three cylinders , wherein said injectors are connected to a fuel accumulator in a common rail fuel injection system and wherein the method starts when the fuel accumulator is pressurized , wherein the method comprises:a) interrupting the fuel supply to the fuel accumulator;b) controlling at least two, and at most all except one of the injectors, to simultaneously open at a specified time and to carry out a test injection of fuel into the associated cylinders, wherein the test injection is carried out at such point in time that the injection does not cause any combustion in such cylinders;c) measuring the pressure decrease in the fuel in the fuel accumulator resulting from the test injection;d) repeating operations b) and c) for a number of divergent combinations of injectors participating in the test injection, so that a subsequent operation e) may be carried out;e) calculating, based on measured pressure decreases during the test injections, the pressure decrease which is attributable to at least one specific injector; andf) comparing the pressure decrease calculated for said at ...

Method at fuel injection

Förfarande vid bränsleinsprutning

537 28 SAMMANDRAG Vid ett forfarande for att faststalla oppningsgraden hos injektorer (7) has cylindrar i en forbranningsmotor (2) med atminstone tre cylindrar, varvid injektorerna är anslutna till en bransleackumula- tor (8) has ett common-rail-bransleinsprutningssystem, avbryts branslematningen till bransleackumulatorn (8) och sedan utfors en testinsprutning av bransle i atminstone tva och hogst alla utom en cylinder at gangen i olika kombinationer vid sadan tid- punkt att insprutningen inte fororsakar flagon forbranning i cy- lindrarna. Tryckminskningarna fororsakade vid de olika testinsprutningarna mats och darur beraknas den tryckminskning som är hanforlig till atminstone en specifik injektor for att anvandas for faststallande av injektorns oppningsgrad.

Método para determinar o grau de abertura de injetores de cilindros de um motor de combustão, dispositivo de controle eletrônico para um motor de combustão, motor de combustão e veículo motorizado

método de injeção de combustível em um método para determinar o grau de abertura de injetores (7) em cilindros de um motor de combustão (2) com pelo menos três cilindros, em que os injetores são conectados em um acumulador de combustível (8) de um sistema de injeção de combustível common rail, o suprimento de combustível para o acumulador de combustível (8) é interrompido e, subsequentemente, uma injeção de teste de combustível é realizada em pelo menos dois e no máximo todos, exceto um cilindro ao mesmo tempo, em diferentes combinações, em tal tempo que a injeção não causa qualquer combustão nos cilindros. as diminuições de pressão causadas em conexão com as diferentes injeções de teste são medidas e a diminuição de pressão, que é atribuível a pelo menos um injetor específico, é calculada com base nisso, para uso na determinação do grau de abertura do injetor.

Method at fuel injection

In a method to determine the opening degree of injectors (7) in cylinders in a combustion engine (2) with at least three cylinders, wherein the injectors are connected to a fuel accumulator (8) in a common rail fuel injection system, the fuel supply to the fuel accumulator (8) is interrupted, and subsequently a test injection of fuel is carried out into at least two and at most all except one cylinder at a time, in different combinations, at such a time that the injection does not cause any combustion in the cylinders. The pressure decreases caused in connection with the different test injections are measured, and the pressure decrease which is attributable to at least one specific injector is calculated based thereupon, for use in the determination of the injector's opening degree.

Method at fuel injection

In a method to determine the opening degree of injectors (7) in cylinders in a combustion engine (2) with at least three cylinders, wherein the injectors are connected to a fuel accumulator (8) in a common rail fuel injection system, the fuel supply to the fuel accumulator (8) is interrupted, and subsequently a test injection of fuel is carried out into at least two and at most all except one cylinder at a time, in different combinations, at such a time that the injection does not cause any combustion in the cylinders. The pressure decreases caused in connection with the different test injections are measured, and the pressure decrease which is attributable to at least one specific injector is calculated based thereupon, for use in the determination of the injector's opening degree.

Skyddshylsa för kabelanslutning till en startmotor

Method of determining fuel injector opening degree

A method is disclosed to determine the opening degree of injectors in cylinders of a combustion engine, where the combustion engine has at least three cylinders. The injectors are connected to a fuel accumulator in a common rail fuel injection system; the fuel supply to the fuel accumulator is interrupted; and subsequently a test injection of fuel is carried out into at least two and, at most, all but for one cylinder at a time, in different combinations, at such a time that the injection does not cause any combustion in the cylinders. The pressure decreases caused in connection with the different test injections are measured, and the pressure decrease that is attributable to at least one specific injector is calculated based thereupon, which is, in turn, used in the determination of the injector's opening degree.