Mazda Motor Corporation

Mazda Motor Corporat Ion

Kouji Miyamoto

Eiji Nishimura

Takeatsu Ito

Youichi Sato

Kouji Tabata

Norihito Iwao

Kota Maekawa

Yasuhiko Nishida

Takahisa Ishihara

Noriyoshi Sahasi

An engine control device is provided, which includes an ignition plug configured to ignite mixture gas inside a cylinder of the engine, an injector configured to change an air-fuel ratio inside the cylinder, a NOsensor, and a controller including a processor. The controller performs a first control to control the ignition plug so that ignition is performed at a basic ignition timing or an ignition timing after the basic timing is corrected based on a combustion state of the mixture gas, and a second control to control the injector so that a NOconcentration approaches a given target value. When the ignition timing is corrected by the first control to a retarding side, the controller suspends a correction to a richer side even if the NOconcentration is a concentration at which the air-fuel ratio is corrected to the richer side by the second control.

Engine control device

A cowl panel comprises an upper face portion, a protrusion portion, a vertical wall portion, and a lower face portion. A front end of the protrusion portion is configured in a curve shape in a plan view such that a central portion, in the vehicle width direction, of the front end is positioned forward the most. A lower end of the vertical wall portion is configured such that at least a central portion, in the vehicle width direction, of the lower end extends substantially straightly in the vehicle width direction. Accordingly, the flexibility of interior design can be improved, and also both the NVH performance and the pedestrian protection performance can be ensured.

Front vehicle-body structure of vehicle

Wheel for motor vehicle

An engine control device has an idle speed control of an engine by an ignition timing control and an idle speed control by air-by-fuel ratio feedback. This engine control device detects roughness caused by a torque change on the basis of a change in angular velocity of a crank shaft, sets a control gain depending on the roughness, reflects the control gain on the idle speed control by the ignition timing control, thereby harmonizing the idle speed control of the engine by the ignition timing control with the idle speed control by the air-by-fuel ratio feedback.

Idle speed control device for engine

Growing community of inventors

Higashihiroshima, Japan

Kouji Miyamoto