Abstract: The notification system that notifies the user of the transfer service that has boarded the vehicle that is able to travel autonomously and provides the transfer service is configured to notify the user when the travel route to the destination of the vehicle is different from the past travel route when the user has moved to the destination or the vicinity of the destination in the past.

Abstract: A mobile object is configured to transmit, in response to a gesture of a traffic participant existing in the vicinity of the mobile object being a stop request, an inquiry signal including position information of the traffic participant to a server in order to confirm whether the mobile object provides a specific service to which the traffic participant who has performed the gesture is subscribed. The server is configured to determine, in response to receiving the inquiry signal, whether the traffic participant who made the gesture is one of users subscribed to the specific service and transmit an answer signal including a result of the determination to the mobile object. The mobile object is further configured to perform, in response to receiving the answer signal, an action according to a result of the determination included in the answer signal.

Abstract: A fuel cell system includes a fuel cell stack, a fuel gas supply path, an injector, an ejector, a circulation path, a pressure difference detection unit that detects a pressure difference between an ejector inlet port pressure and an ejector outlet port pressure, and a control device. The control device calculates a required circulation flow rate that is required for a fuel off gas supplied from the fuel cell stack to the ejector, based on a required load for the fuel cell stack, calculates an estimated circulation flow rate that is an estimated flow rate of the fuel off gas supplied from the fuel cell stack to the ejector, based on the required load and the pressure difference, and increases the flow rate of a fuel gas supplied from the injector to the fuel cell stack when the estimated circulation flow rate is lower than the required circulation flow rate.

Abstract: A fuel cell system includes a fuel cell stack, a fuel gas supply path, an injector, an ejector, a circulation path, an outlet port pressure detection unit, and a control device. The control device stops driving the injector when an ejector outlet port pressure is equal to or more than a required upper limit value with the injector driven, and drives the injector when the ejector outlet port pressure is equal to or less than a required lower limit value with the injector stopped. The control device reduces the required upper limit value stepwise and reduces the required lower limit value stepwise in a range defined by a first target upper limit value and a second target upper limit value when a required load is varied from a first required load to a second required load and a load reduction amount is more than a first predetermined load.

Abstract: To provide a fuel cell system configured to, when fuel cell stacks are installed in a vehicle and an impurity is contained in fuel gas, minimize the number of fuel cell stacks to which the fuel gas containing the impurity is supplied. A fuel cell system wherein, after power generation by a first stack, a controller determines whether or not an impurity is contained in a fuel gas filled into a fuel tank; wherein, when the controller determines that an impurity is contained in the fuel gas filled into the fuel tank, the controller determines whether or not the impurity is a poisoning substance; and wherein, when the controller determines that the impurity is the poisoning substance, the controller prohibits the supply of the fuel gas to fuel cell stack(s) other than the first stack.

Abstract: A fuel cell system includes a fuel cell stack, a fuel gas supply path, an injector, an ejector, a circulation path, a pressure difference detection unit that detects a pressure difference between an ejector inlet port pressure and an ejector outlet port pressure, and a control device. The control device calculates a required circulation flow rate that is required for a fuel off gas supplied from the fuel cell stack to the ejector, based on a required load for the fuel cell stack, calculates an estimated circulation flow rate that is an estimated flow rate of the fuel off gas supplied from the fuel cell stack to the ejector, based on the required load and the pressure difference, and increases the flow rate of a fuel gas supplied from the injector to the fuel cell stack when the estimated circulation flow rate is lower than the required circulation flow rate.

Abstract: A fuel cell system includes a fuel cell stack, a fuel gas supply path, an injector, an ejector, a circulation path, an outlet port pressure detection unit, and a control device. The control device stops driving the injector when an ejector outlet port pressure is equal to or more than a required upper limit value with the injector driven, and drives the injector when the ejector outlet port pressure is equal to or less than a required lower limit value with the injector stopped. The control device reduces the required upper limit value stepwise and reduces the required lower limit value stepwise in a range defined by a first target upper limit value and a second target upper limit value when a required load is varied from a first required load to a second required load and a load reduction amount is more than a first predetermined load.