Abstract: Methods and systems are provided for accurately estimating an engine volumetric efficiency in a multi-fuel engine system operating with different fuels and different injection systems. The volumetric efficiency is revised based on the fraction of each fuel in the total fuel injection amount as well as based on the injection type for each fuel. The volumetric efficiency estimate compensates for the partial pressure effect and charge cooling effect of each fuel as well as each injection type.

Abstract: A fuel pump (14) pumps fuel in a method for operating an internal combustion engine (10). The fuel pump (14) is connected at its input end to a fuel tank (12). Fuel reaches at least one combustion chamber (22) of the engine (10) via at least one fuel-injection device (16). In order to be able to inject fuel with still greater accuracy into the combustion chamber (22) of the engine (10), the fuel quantity which arrives in the combustion chamber (22) is determined from the signal of a through-flow measuring device (18).

Abstract: Apparatuses and methods for delivering fuel to at least two combustion chambers of an engine. A fuel controller receives a first fuel quantity signal indicative of a first desired quantity of fuel to be delivered to each combustion chamber of the engine during a combustion cycle. The fuel controller transmits at least one second fuel quantity signal as a function of the first fuel quantity signal, and transmits at least one third fuel quantity signal as a function of the first fuel quantity signal. The second and third fuel quantity signals are indicative of a respective second and third desired quantities of fuel to be delivered during a combustion cycle. The sum of the fuel quantities corresponding to the second fuel quantity signals transmitted during a combustion cycle are less than the first desired fuel quantity.

Abstract: The present invention provides a system for running a diesel engine comprising an idle speedup switch, an uphill slope sensor, an accelerator pedal sensor, control means increasing an idle speed, when the idle speedup switch is on or the accelerator pedal is depressed on an uphill slope to start movement of a vehicle in an idle state, to a predetermined level greater than a given idle speed such that an amount of air supply increases and operating the engine in accordance with the increased amount of air supply, and a turbocharger providing air to the engine.

Abstract: The present invention provides a system for running a diesel engine comprising an idle speedup switch, an uphill slope sensor, an accelerator pedal sensor, control means increasing an idle speed, when the idle speedup switch is on or the accelerator pedal is depressed on an uphill slope to start movement of a vehicle in an idle state, to a predetermined level greater than a given idle speed such that an amount of air supply increases and operating the engine in accordance with the increased amount of air supply, and a turbocharger providing air to the engine.