Nissan Motor Company Limited

Aichi Machine Industry Co., Ltd.

Valeo Systemes Thermiques

Takayoshi Ichihara

Norio Ito

Masatoshi Hada

Kakuzou Kaneko

Hiroaki Hoshikawa

Kazuo Muraki

Aiko Kawamoto

Tomohiro Kawata

Yoshimi Oko

Stephane Peyrazat

A control method and a control device are provided for an internal combustion engine structured to vary a mechanical compression ratio by varying a range of slide of a piston with respect to a cylinder bore, and structured to control a flow of cooling water in a water jacket formed around the cylinder bore, wherein variation of the mechanical compression ratio causes the piston to slide on a corroded portion formed in the cylinder bore. A control process includes: acquiring a temperature correlating with a cylinder bore wall temperature; and stopping the flow of cooling water in the water jacket, in response to a condition that the acquired temperature is lower than a preset temperature point.

Control method for internal combustion engine and control device for internal combustion engine

A cooling control device for an internal combustion engine has an internal coolant passage formed in the internal combustion engine, external coolant passages formed outside the internal combustion engine and connected to the internal coolant passage, the cooling control device performing coolant passage switching in which the internal coolant passage and a certain one of the external coolant passages are connected to or disconnected from each other by a circuit switching mechanism, a branching passage that sends coolant in the internal coolant passage to one of the external coolant passages which passes through a radiator, when the circuit switching mechanism has a failure and fails in circuit switching of connecting the internal coolant passage and the external coolant passage passing through the radiator to each other, and a wax-type thermostat provided in the branching passage that opens the branching passage when the internal combustion engine is excessively heated.

Cooling control device and cooling control method for internal combustion engine

A control unit stores a correlation between a temperature difference &#x394;T between an inlet temperature and an outlet temperature of a heat exchanger for cooling of cooling water, and the amount of thermal deformation occurring in the heat exchanger. At the time when the cooling water is supplied to the heat-exchanging flow path having the heat exchanger, the control unit refers to the temperature difference &#x394;T and the correlation to obtain the volume of flow of the cooling water supplied to the heat-exchanging flow path so that the amount of thermal deformation is less than or equal to a threshold amount of thermal deformation set in advance.

Cooling device for internal combustion engine, and cooling method for internal combustion engine

An air conditioning system for automobile having a heater core capable of heating the interior in good efficiency is to be provided. Such a heater core is supplied with the coolant having bubbles removed, and thereby the efficiency of heat exchange is enhanced and the noise is reduced. On the internal combustion engine is mounted a water outlet (bubble separating means)having a receiving chamberthat the coolant after cooling the engine flows in. In the downstream position of the chamberis formed a communicating portionof narrowed sectional area and a feeding chamberof increased sectional area in turn. The flowing velocity of the coolant is increased in the communicating portionand decreased in the feeding chamberand thereby it is possible to make bubbles in the coolant float up and separate out. As a result, the coolant without bubbles may be fed to the heater corethrough a feeding portion

Vehicle air conditioning system and automobile having the vehicle air conditioning system

A cooling system for an internal combustion engine in which bubbles are not transferred to the water pump, and thereby the efficiency of the water pump is maintained. The interior of a water outlet mounted on a cylinder head is divided by a partition wall to form a feeding chamber to feed the coolant introduced from the cylinder head to a first path provided with a radiator, and a receiving chamber forming a second path to receive the coolant returned from a heater core. Between the receiving chamber and the feeding chamber is a channel making one or both chambers communicate with the other. As a result, bubbles in the coolant running through the second path are introduced into the feeding chamber through the channel and removed from the radiator.

Coolant distributing means for an internal combustion engine

An internal combustion engine performing its cooling by means of coolant and being capable of detecting a temperature of the coolant accurately is to be provided. In this engine, there is mounted a water outletprovided with a temperature detecting meansfor detecting a temperature of the coolant after cooling the engine, and with a riband an upslope surfaceboth of which are capable of guiding the coolant to a temperature detecting portionof the temperature detecting means

Internal combustion engine thermostat guide

A water pump of an engine includes a pump housing adapted to be fixed to the engine; a pump body joined to the pump housing to define a fluid chamber of the water pump between the pump body and the pump housing; and a rotational pump shaft member extending through the pump body into the fluid chamber. A fastener set for fastening the pump housing and the pump body together includes a housing-side fastener or bolt extending in a direction along the rotational pump shaft member from the pump housing's side to the pump body's side.

Growing community of inventors

Kanagawa, Japan

Takayoshi Ichihara