摘要:
The invention relates to an intercooler for a motor vehicle with an internal combustion engine that is supercharged in steps. In this case, the intercooler has an air outlet opening as well as two air inlet openings, a heat exchanger module being associated with each air inlet opening. Air channels of the two heat exchanger modules are ultimately brought together in an air box of the intercooler, which is connected to the air outlet opening. It is thus made possible to bring together compressed charging air from two supercharging assemblies only in the area of the intercooler. To improve the pressure ratios during operation of only one supercharging assembly, a non-return valve is provided in an air channel. Thus, a module for separately bringing the airways together can be eliminated, thereby reducing the installation space requirement.
摘要:
The invention relates to an intercooler for a motor vehicle with an internal combustion engine that is supercharged in steps. In this case, the intercooler has an air outlet opening as well as two air inlet openings, a heat exchanger module being associated with each air inlet opening. Air channels of the two heat exchanger modules are ultimately brought together in an air box of the intercooler, which is connected to the air outlet opening. It is thus made possible to bring together compressed charging air from two supercharging assemblies only in the area of the intercooler. To improve the pressure ratios during operation of only one supercharging assembly, a non-return valve is provided in an air channel. Thus, a module for separately bringing the airways together can be eliminated, thereby reducing the installation space requirement.
摘要:
In order to reduce fuel consumption and exhaust gas emissions in an internal combustion engine, diesel as well as spark-ignition engines, on the one hand by means of exhaust gas recirculation, but on the other to be able to use temperature-sensitive intake manifolds of economical plastics, a temperature sensor (12) measures the temperature at a definable point in the intake area, preferably in the intake manifold (9) where the highest temperature occurs. The amount of recirculated exhaust gas (1) is set by a control means (8) such that the temperature measured at a definable point does not exceed a definable maximum value, the boundary temperature of the material from which the intake manifold (9) is made, or is adjusted to this maximum value. Alternatively, instead of the temperature being measured in the intake manifold (9) the temperature prevailing there can be computed in a control device (10) or the like which by design is necessary for an internal combustion engine with exhaust gas recirculation by means of a computational model from the n measured values for temperature, pressure and/or speed or the like delivered from the n sensors (11) which by design are necessary for exhaust gas recirculation.
摘要:
A method of diminishing the thermal effects of the exhaust gas recirculation in an internal combustion engine of a motor vehicle generally consisting of sensing the temperature of the gas at a selected point along the flow thereof, comparing the sensed temperature with a selected temperature and adjusting the supply of the gas responsive to a selected deviation of the sensed temperature from the selected temperature.
摘要:
The invention relates to a method for operating an internal combustion engine comprising at least two cylinders respectively provided with admission valves and exhaust valves. According to the invention, in order to fill the cylinders with a larger amount of unburned gas during a gas exchange, the exhaust interval is reduced and the crossover phase of admission and exhaust intervals is extended, for at least one cylinder (3). The invention also relates to an internal combustion engine for carrying out said method.
摘要:
The invention relates to a method for operating an internal combustion engine comprising at least two cylinders respectively provided with admission valves and exhaust valves. According to the invention, in order to fill the cylinders with a larger amount of unburned gas during a gas exchange, the exhaust interval is reduced and the crossover phase of admission and exhaust intervals is extended, for at least one cylinder (3). The invention also relates to an internal combustion engine for carrying out said method.