Isuzu Motors Limited

Nikki Co., Ltd.

Shinichiro Kaneko

Koji Goto

Buso Takigawa

Misao Tanaka

Ryota Adachi

Takayuki Kiuchi

Provided are; a fuel supply control device capable of preventing damage on components caused by LNG fuel in a liquid state; and a vehicle. The fuel supply control device is for controlling selective supply, to an engine, of either LNG fuel or CNG fuel stored in separated tanks, and is provided with: a determination unit for determining whether warming up of the engine is completed after start of the engine; and a control unit that performs CNG fuel supply control for supplying CNG fuel to the engine when the warming up of the engine is not yet completed, and performs LNG fuel supply control for supplying vaporized LNG fuel to the engine when the warming up of the engine is completed.

Fuel supply control device and vehicle

This fuel property determination device determines components of liquefied natural gas stored in a tank as a fuel for an engine. The fuel property determination device has: an estimation unit that estimates the methane number of the liquefied natural gas using a first estimation method when the engine is being driven, and estimates the methane number of the liquefied natural gas using a second estimation method different from the first estimation method when the engine is to be restarted from a stopped state; and a control unit that controls a notification device so as to provide a notification indicating that a property change has occurred in the liquefied natural gas, if the methane number of the liquefied natural gas estimated by the first or second estimation method is less than a threshold.

Fuel property determination device and vehicle

Provided are an engine control device and a vehicle with which the methane number of LNG fuel can be estimated. The engine control device is capable of using liquefied natural gas as fuel, and is provided with an acquisition unit that acquires an ignition retard control amount for avoiding engine knocking, and an estimating unit that estimates the methane number of the liquefied natural gas on the basis of an index value indicating the acquired ignition retard control amount.

Engine control device and vehicle

A variable valve timing and lift mechanism consists of low and high speed cams provided in phase on the camshaft of an overhead camshaft engine, the high speed cam having larger lift than the low speed cam although the base circle diameter of the two is the same. The low speed cam is coupled to port opening/closing valve(s) via a direct-driven tappet and the high speed cam is coupled to the same valve via a piston-type tappet consisting of a pair of pistons sealed in a support with an oil chamber interposed in between. The oil chamber is connected to the lubricating oil circuit of the engine by an oil passage provided with a control valve. This variable valve timing and lift device with the so-called direct attack-type dynamic valve mechanism, where the cam drives the valves directly without using any rocker arm and connecting mechanism, solves the problems created by the inability of the rocker arm, etc. to keep pace with the valve at high speed because of inadequate rigidity of the dynamic valve system; it yields high output at both low and high speeds; it does not suffer from lift loss; it can correctly select valve timing and valve lift in conformity with the high or low speed of the engine; and it has small valve acceleration.

Growing community of inventors

Fujisawa, Japan

Shinichiro Kaneko