Peugeot Citroen Automobiles Sa

Psa Automobiles Sa

Technoboost

Peugeot Citroën Automobiles

Armel Le Lievre

Ludovic Tomasseli

Emmanuel Boudard

Pierre Dumoulin

Julien Berger

Michael Wascheul

Marc Giannoni

Mathieu Bartoletti

William Perrard

The invention relates to a method of heating a motor vehicle cabin by means of a circuit () for circulating a cooling fluid for cooling an engine () and including a pump (), an air heater unit (), and a heat exchanger () disposed in an exhaust system () that is also provided with a depollution assembly (). The exhaust gas is directed towards the heat exchanger () or towards a bypass duct () downstream from the depollution assembly () as a function of engine operating conditions, of the outside temperature, of the heating temperature requested in the vehicle cabin, and of the temperature of the engine cooling fluid. The invention applies more particularly to direct injection diesel engines.

Method and device for heating a motor vehicle cabin

The invention relates to a control device (D) which is intended to control the temperature of first and second fluids formed by the lubricating oil of the heat engine () of the vehicle and the recirculated exhaust gases respectively. The inventive device (D) comprises a first heat transfer liquid/lubricating oil exchanger () and a second heat-transfer liquid/recirculated exhaust gases exchanger (), said first and second exchangers being connected to the same heat transfer liquid circuit (). Preferably, the heat-transfer liquid circuit () is connected to a heat source or a heat sink () comprising, for example, heat storage means () which can exchange heat with the heat-transfer liquid.

Device for controlling the temperature of fluids circulating in a heat engine vehicle and method used by said device

A method for cooling a motor vehicle engine consists in regulating the volume and the flow rate of a coolant fluid in a hydraulic circuit provided with a degassing bypass hose equipped with an electronically controlled proportional actuator and with means forming direct return of fluid or bypass. The method comprises a step of determining the temperature of the cooling liquid, a step of comparing the temperature of the cooling liquid with a first and second threshold temperature, and a step of controlling the opening of the actuator such that, when the fluid temperature is between the first and the second threshold temperatures, the degree at which the actuator is opened is at least temporarily proportional to the cooling fluid temperature. The invention also concerns a device for cooling a motor vehicle engine.

Method and device for cooling a motor vehicle engine

A method for cooling a motor vehicle engine which engine consists in regulating the volume and the flow rate of a coolant in a hydraulic circuit provided with a first bypass hose wherein is arranged a water/oil exchanger. The method comprises a first step of regulating the flow rate of the liquid in the first bypass hose to increase the speed of the increase in the temperature of the oil and a second step of regulating the flow rate of the liquid in the first bypass hose to maintain the temperature of the oil at about a reference temperature. The invention also concerns a device for cooling a motor vehicle engine.

A method for cooling a motor vehicle engine consists in regulating the volume and the flow rate of a coolant fluid in a hydraulic circuit provided with a branch equipped with an electronically controlled actuator and means forming radiator. The method comprises a step of determining the temperature of the cooling liquid, a step of comparing the temperature of the cooling liquid with a specified threshold temperature from which the engine is said to be hot, and, when the temperature of the fluid is higher than the threshold temperature, the flow rate in the radiator branch is regulated so as to maintain the temperature of the cooling fluid around a specified setpoint value. The curve representing the opening of the thermostat valve based on the temperature of the cooling fluid exhibits an hysteresis around the setpoint temperature. The invention also concerns a device for cooling a motor vehicle engine.

A method for cooling a motor vehicle engine consists in regulating the volume and the flow rate of a coolant fluid in a hydraulic circuit provided with a degassing bypass hose wherein is provided a degassing box. The method comprises a step of determining the temperature of the cooling liquid, a step of comparing the temperature of the cooling liquid with a first threshold temperature, and a step of regulating the fluid circulation in the degassing bypass hose such that, when the fluid temperature is higher than the first threshold, the amount of fluid circulating in the bypass hose is greater than the amount circulating in that same bypass hose when the fluid temperature is lower than the first threshold temperature. The invention also concerns a device for cooling a motor vehicle engine.

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Montesson, France

Armel Le Lievre