Abstract:
A cooling system has a diverter valve to selectively control the flow of coolant through an internal combustion engine having a cylinder block with a cooling jacket and a cylinder head mounted on the block with a cooling jacket. A controller, responsive to the temperature of the block and the head, controls the diverter valve and a water pump to provide adequate coolant flow through the head and the block as needed to maintain optimal operating temperatures. After the engine is shut off, the controller continues to operate the water pump and a cooling fan to continue to cool the engine for a period of time.
Abstract:
This invention is based on a method for monitoring a cooling fluid circuit (16) of an internal combustion engine (10), with at least one heat exchanger (18, 22), a regulating valve (26), a cooling fluid pump (32), and an electronic control unit (76). The invention proposes that the control unit (76) predetermine a permissible upper and lower deviation of a reference parameter from a desired value, based on operating parameters of the internal combustion engine (10) and with the aid of deviation characteristic fields (56, 58), and that it compare these permissible upper and lower deviations to a difference between a desired value and an actual value of the reference parameter, wherein the actual value is determined based on parameters of the volumetric flow of the cooling fluid, possibly with the aid of characteristic fields (42, 46, 74).
Abstract:
A cooling system for an internal combustion engine of a motor-vehicle has two separate cooling circuits for the cylinder head and the engine block. The cooling fluid which flows through the cylinder head circulates through a radiator in all operating conditions of the cooling system. The cooling fluid which flows through the engine block is instead de-routed so that it does not flow through the radiator and, when it comes out of the engine block, is fed into a conduit at the outlet from the head so that the engine block is kept at a temperature greater than that of the head. An electronic control unit controls the adjustment of a pump for activating the circulation of the cooling fluid, and a flow control valve which de-routes a portion of the cooling fluid at the outlet of the pump towards the engine block. The electronic control unit carries out the above regulations as a function of signals directed thereto from a plurality of sensors which are indicative of a number of engine operating parameters.
Abstract:
An apparatus is provided for controlling the temperature of an engine based on a temperature control signal generated by an electronic control module of the engine. The electronic control module is coupled to a plurality of sensors configured to detect a plurality of engine component parameters and is configured to generate the temperature control signal related to an optimum engine temperature calculated using at least one output signal from at least one of the plurality of sensors. The apparatus includes a controller coupled to the electronic control module and to an engine temperature sensor. The controller generates an output signal based on the temperature control signal received from the electronic control module and on a signal proportional to the actual engine temperature received from the engine temperature sensor. The apparatus also includes an electronically actuated thermostat including a valve located within a coolant flow passageway of the engine and a motor electrically coupled to the controller. The motor is configured to open and close the valve to control flow of a coolant fluid in the coolant flow passageway in response to the output signal from the controller.
Abstract:
An engine cooling system is provided. The system includes a cylinder block formed that has a block coolant chamber formed therein and a front insert that is inserted downward of an upper portion of a front side and receives coolant in the block coolant chamber to adjust a flow of the coolant. Additionally, a rear insert is inserted downward of an upper portion of a rear side and exhausts the coolant in the block coolant chamber to adjust the flow of the coolant.
Abstract:
A method is disclosed for improving fuel economy in an internal combustion engine. The method may involve sensing a temperature of an engine block and determining a block thermal energy representing an ability of the block to reject heat. An open loop control scheme may be used together with the block thermal energy to predict if a coolant in the block is about to enter a boiling condition and, when this is about to occur, to open a block valve to permit a flow of coolant through the block. A closed loop control scheme may be used together with the sensed temperature of the block to determine if a coolant boiling condition is about to occur, and to control the block valve to permit a flow of coolant through the block which is just sufficient to prevent the onset of coolant boiling in the block.
Abstract:
A method is disclosed for improving fuel economy in an internal combustion engine. The method may involve sensing a temperature of an engine block and determining a block thermal energy representing an ability of the block to reject heat. An open loop control scheme may be used together with the block thermal energy to predict if a coolant in the block is about to enter a boiling condition and, when this is about to occur, to open a block valve to permit a flow of coolant through the block. A closed loop control scheme may be used together with the sensed temperature of the block to determine if a coolant boiling condition is about to occur, and to control the block valve to permit a flow of coolant through the block which is just sufficient to prevent the onset of coolant boiling in the block.
Abstract:
A cooling pump for an internal combustion engine and a cooling system including the pump. The pump is driven by an electrically-operated motor so as to rotate in a positive direction for supplying cooling water in a reservoir tank to the engine and in a reverse direction for returning the cooling water in the engine to the reservoir tank. The cooling system includes a controller that is coupled with the motor of the pump and generates a first control signal for operating the motor to rotate the pump in the reverse direction so as to return the cooling water in the engine to the reservoir tank and generates a second control signal for operating the motor to rotate the pump in the positive direction so as to supply the cooling water in the reservoir tank to the engine, on the basis of an operating condition of the engine.
Abstract:
A cooling system for a heat producing system includes a heat exchanger in fluid communication with the heat producing system. The heat exchanger is configured to receive a temperature control fluid therethrough. A first fan is operable in a first rotational direction to move air through the heat exchanger in a first direction. A second fan is disposed radially adjacent to the first fan, and is operable in a second rotational direction opposite the first rotational direction to move air through the heat exchanger in the first direction. A control system, including at least one controller, is provided for controlling operation of the fans.
Abstract:
A cooling system for an internal combustion engine 1 is disclosed in which an electronically controlled flow control valve 9 is used to control the flow of coolant exiting the engine 1. The electronically controlled flow control valve 9 is able to control the cooling of the engine 1 irrespective of the speed at which a pump 2 used to urge coolant to flow into the engine 1 is rotated by a drive belt 3 connected to an output 4 from the engine 1.