A motor vehicle may include an internal combustion engine, a radiator, a heat exchanger, a coolant pump, and a valve device arranged separately therefrom, which is controlled at an intake side by pressure. The valve device may include at least one first coolant inlet, at least one second coolant inlet, and a coolant outlet connected to an inlet of the coolant pump. The valve device may be configured to, based on a selected operating point of the coolant pump and a pressure in a coolant, at least one of open and close at least one of the at least one first coolant inlet and the at least one second coolant inlet. The at least one first coolant inlet and a coolant outlet of the coolant pump may be connected to the internal combustion engine, and the at least one second coolant inlet may be connected to the radiator.

An electric coolant pump may include at least one first coolant inlet, at least one second coolant inlet, a coolant outlet, and a valve device. The valve device may be configured to, based on a selected operating point and a pressure in a coolant, at least one of open and close at least one of the at least one first coolant inlet and the at least one second coolant inlet. The valve device may be integrated in a body of the coolant pump.

A water cooling device capable of switching a pump loop is provided. The water cooling device sends a liquid coolant through a first pump or a second pump and moves a shuttle valve to a first position or a second position, so that the liquid coolant can flow into the shuttle valve from different directions and then flow out from an output hole. The shuttle check does not consume power, but also can achieve the non-return function. Then, the liquid coolant flows into a water block to cool a load. After that, the liquid coolant flows to a radiator fan for heat dissipation and then flows to the water tank for circulation, achieving the effect of bidirectionally switching the pump loop. The water cooling device can continue to operate without stopping.

A cooling apparatus of an engine of the invention has a circulation passage for supplying cooling water to head and block passages through a heat exchanger. The apparatus circulates the cooling water through the circulation passage when a second condition is satisfied and then, a first condition is satisfied. The first condition includes a water supply condition that a supply of the cooling water to the exchanger is requested. The second condition includes the water supply condition and a condition that a cooling water temperature is lower than an engine completely-warmed water temperature.

An electric coolant pump may include a valve device controlled at a discharge side by pressure. The valve device may include a coolant inlet, a first coolant outlet, and a second coolant outlet. The valve device may be configured to at least one of open and close at least one of the first coolant outlet and the second coolant outlet based on a selected operating point and a pressure in a coolant.

In an internal combustion engine, a thermostat valve for changing over between coolant circulation through a radiator-routing passage to coolant circulation through a bypass passage, is provided with a first valve for opening and closing the radiator-routing passage, and a second valve for opening and closing the bypass passage. The first and second valves and are operable concurrently. A cylinder coolant jacket around cylinder bores of a cylinder portion is partitioned into two in a cylinder axis direction to thereby form a main cylinder coolant jacket on a side of a cylinder head portion and a sub-cylinder coolant jacket on a side of a crankcase portion. The bypass passage is formed partly by the sub-cylinder coolant jacket. The above arrangement expedites warming-up during the engine start and achieves favorable appearance by a simplified structure.

A coolant circulation system includes a coolant circuit including a water jacket, a motor-driven pump, an outlet liquid temperature sensor, and a controller. The controller executes variation determination control for driving the motor-driven pump to determine whether a variation in the temperature of the coolant in a diesel engine is equal to or less than a predetermined value based on an outlet temperature detected by the outlet liquid temperature sensor. The controller executes circulation stop control on condition that it is determined that the variation in the temperature of the coolant is equal to or less than the predetermined value. The controller changes the period during which the circulation stop control is executed in accordance with the outlet liquid temperature detected at the start of the circulation stop control.

A surgical stapler including an anvil, a staple cartridge, and a buttress material removably retained to the anvil and/or staple cartridge. In various embodiments, the staple cartridge can include at least one staple removably stored therein which can, when deployed, or fired, therefrom, contact the buttress material and remove the buttress material from the anvil and/or staple cartridge. In at least one embodiment, the anvil can include at least one lip and/or groove configured to removably retain the buttress material to the anvil until deformable members extending from the surgical staple are bent by the anvil and are directed toward and contact the buttress material.

A control system reduces the amount of fuel injected from a second fuel injector in one cycle to an amount smaller than a second basic injection amount according to operating conditions of an internal combustion engine, and increases the amount of fuel injected from a first fuel injector in one cycle to an amount larger than a first basic injection amount according to operating conditions of the engine, during a predetermined period after a flow restricting operation is finished, so as to reduce fluctuations in the air-fuel ratio due to fluctuations in the wall temperature.

An internal combustion engine including a cooling liquid circuit, which is connected to a cylinder head and an engine block of the internal combustion engine and which includes a cooling liquid pump. The cooling liquid pump includes a drive shaft and is capable of conveying cooling liquid in the cooling liquid circuit. Further, the internal combustion engine includes a Visco clutch. The Visco clutch is arranged for the drive by the internal combustion engine. The Visco clutch includes a clutch fluid for torque transmission. At the output side, the Visco clutch is connected to the drive shaft of the cooling liquid pump. The drive shaft of the cooling liquid pump include at least one heat pipe. The heat pipe is in heat exchange with the clutch fluid as a heat source and the cooling liquid as a heat sink.