Ngk Spark Plug Company, Limited

Manabu Okinaka

Toshiyuki Nakamura

Hiroyuki Suzuki

Masato Taniguchi

Takaya Yoshikawa

Nobuyuki Hotta

Yoshihiro Yamamoto

Akimitsu Sassa

Takafumi Tanaka

Tetsuhara Honma

A control apparatus () controls a diesel engine (). A glow plug () which can detect cylinder pressure is provided on the engine (). An ECU () computes a parameter related to a change in cylinder pressure obtained from the glow plug (). The ECU () controls fuel injection timing such that the parameter falls within a target range when combustion in the engine () is switched from premixed combustion to diffusion combustion.

Control apparatus for diesel engine and control method for diesel engine

A ceramic glow plug equipped with a pressure sensor including a ceramic heater, a holding device, a housing sleeve, a housing, a movable member and a pressure sensor. A heat-generating main portion P whose resistance is 75% of the total resistance of the ceramic heater is located forward of the forward end of the holding sleeve.

Ceramic glow plug equipped with pressure sensor

An electric current supply control apparatus for a glow plug, and glow plug and the electric current supply control apparatus connected to the glow plug. In a transition state in which the load acting on an engine increases such as at the time of acceleration (S: YES), an instruction signal which instructs increasing of an EGR amount is transmitted to an ECU (S). Further, electric current is supplied to a heat generation resistor of a glow plug through resistance PI control (S), whereby the temperature of the heat generation resistor is stably maintained at a target temperature, and stability of combustion is enhanced. Thus, even at the time of acceleration, generation of NOcan be suppressed effectively by increasing the EGR amount without lowering the engine output.

Electric current supply control apparatus for glow plug, and glow plug and electric current supply apparatus connected to the glow plug

A joint structure which does not exhibit impaired joining strength induced by exposure to heat cycles and the occurrence of migration, in a ceramic heater for a glow plug or like device. A heating element is embedded in a silicon nitride ceramic substrate . Lead wires are joined to corresponding lead wire connection terminals , which are connected to the heating element while electrical continuity is established therebetween, by use of a brazing metal which contains a predominant amount of copper. The brazing metal used for joining assumes the form of a brazing metal layer having a thickness of 30-400 &mgr;m.

Ceramic heater with lead wire connection having brazing material containing a predominant amount of copper

To provide a ceramic heater which is better in the durability of an ion current detecting electrode portion and which can be manufactured at a low cost. A ceramic heater is provided with: an insulating ceramic substrate a resistance heating element buried in the insulating ceramic substrate; and an ion current detecting electrode portion formed integrally with the resistance heating element in the insulating ceramic substrate and having its own surface portion exposed as an ion current detecting face to the surface of the insulating ceramic substrate. The ion current detecting electrode portion is constructed, at its portion including at least a portion of the ion current detecting face of a conductive ceramic phase which is composed mainly of non-metallic conductive ceramic having a cation component made of a nonmetallic element, such as silicon carbide.

Growing community of inventors

Kani, Japan

Manabu Okinaka